Medical Applications Guide Amplifiers, Clocks, Data Converters, D
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Medical Applications Guide
Amplifiers, Clocks, Data Converters, Digital Signal Processors, Digital Temperature Sensors, Interface, Logic, Microcontrollers, Power Management,
2007
Inside
Consumer Portable Medical
Blood Pressure Monitors Heart Rate Monitors Blood Analyzer Digital Thermometers Pulse Oximetry Products Portable Medical 8-16 System Support Products Wireless Interface, RFID Tag-it12 Low-Power Products, ZigBee14 Power Management Products
Diagnostic, Patient Monitoring, Therapy
Electrocardiogram (ECG) Electroencephalogram (EEG) Blood Oxygen (Pulse Oximetry) Ventilation/Respiration Defibrillators Power Management Products
Medical Imaging
Ultrasound Computed Tomography (CT) Magnetic Resonance Imaging (MRI) Digital X-Ray Scanners Power Management Products
Medical Instruments Resources
Enhanced Products Analog eLabDesign Center Design Tools
Medical Applications Guide
Table Contents
IMPORTANT NOTICE: products authorized safety-critical applications (such Class applications) where failure product would reasonably expected cause severe personal injury death, unless officers parties have executed agreement specifically governing such use. Systems equipment manufacturers designers incorporate products into their products represent that they have necessary expertise safety regulatory ramifications application, they acknowledge agree that they solely responsible legal, regulatory safety-related requirements concerning their products products such safety-critical applications, notwithstanding applications-related information support that provided Further, systems equipment manufacturers designers incorporate products into their products agree fully indemnify representatives against damages arising products such safety-critical applications.
Consumer Portable Medical
Blood Pressure Monitors Heart Rate Monitors Blood Analyzer Digital Thermometers Pulse Oximetry Products Portable Medical .8-16 System Support Products Wireless Interface, RFID Tag-it. Low-Power Products, ZigBee. Power Management Products Portable Applications
Diagnostic, Patient Monitoring Therapy
Electrocardiogram (ECG) Electroencephalogram (EEG) Blood Oxygen (Pulse Oximetry) Ventilation/Respiration Defibrillators Power Management Products Diagnostic Applications
Medical Imaging
Ultrasound Computed Tomography (CT) Magnetic Resonance Imaging (MRI) Digital X-Ray Scanners Power Management Products Imaging Applications
Medical Instruments
Medical Instrumentation
Resources
Enhanced Products Analog eLabDesign Center Design Tools
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
Consumer Portable Medical Applications Discussion
This Section
Portable Medical Applications Blood Pressure Heart Rate Monitors Blood Analyzer Digital Thermometers Pulse Oximetry System Support Products Wireless Interface, RFID Tag-itLow-Power Products Low-Power Products, ZigBeePower Management Portable Devices Products Portable Medical
Data Processing, Amplification Conversion sensor input, some type display sensor element(s) itself. general, these battery-operated, microcontroller-controlled handheld devices that take measurements using various bio-sensors. Obviously, actual implementation topology these blocks will differ greatly with sensing, processing information display demands meter type feature set. design considerations ultra-low power consumption high efficiency driven need extended battery life, high precision with fast response time driven user's need quickly know their health status. Additional requirements drive needs additional memory allow historical profiling, cabled wireless interfaces data upload computer home doctor's office even access sensor, possibly audio feedback simple good/not good indication more complex step-by-step utilization instructions. Adding these features without increasing power consumption significant challenge. Texas Instruments offers broad portfolio high-performance Microcontrollers, Digital Signal Processors (DSPs), Instrumentation, Operational Buffer Amplifiers, Data Converters, Power Battery Management, Audio Amplifiers, both Wired Wireless Interface components.
Portable Medical Applications
Whether developing blood glucose meter, digital blood pressure meter, blood meter, digital pulse/heart rate monitor even digital thermometer, there five system level blocks that common each one: Power/Battery Management, Control
Core Portable Medical System (Processor, Memory, Display, Keypad, Power, Battery Management)
System Based Operational Functional Blocks Portable Medical Systems
Display Bio-Sensor Precision Reference Instrumentation
Backlight ZigBeeWireless Data Transmission Sensor Access
MSP430 Controller
Bluetooth® Power Wireless
Buffer
Flash MSP430 µController
Controller
Transient Protection
Wired Data Transmission
Power Driver
Clock Current Limit Switch Card Slot System Calibration
Keypad
µController Memory Power
Fuel Gauge
Lithium Battery Protection
Battery Charger
Audio Feedback Instructions
Battery Management Plug Optional Adapter Line
General block diagram typical portable medical devices.
Texas Instruments 2007
www.ti.com/medical
Medical Applications Guide
Consumer Portable Medical Devices
Blood Pressure Heart Rate Monitors
Microcontroller Power Management Keypad Digital I/Os Audio Output (PWM/DAC) Speech/Sound EEPROM Memory (Flash) Motor Control Motor Control (LCD Driver, SPI, I2C) Display
Blood Pressure Monitor
system uses either Korotkoff, Oscillometry, Pulse Transit Time methods measure blood pressure. employs pressure cuff pump, plus transducer measure blood pressure heart rate three phases: Inflation, Measurement, Deflation. includes LCD, selection buttons, memory recall, power management interface. core subsystems include: Processor/Memory digital pressure measurement heart rate performed microprocessor. Measurement results stored Flash memory data that uploaded USB. User Interface Allows user control pressure measurement process read results display. Sensor Interface Allows processor control cuff inflation/deflation sense blood pressure which amplified instrumentation amplifiers digitized ADC. Power Conversion Converts input power from alkaline battery various functional blocks.
Pressure Sensor
Amplifier
16-Bit Reference
Interface (RS232, USB, Wireless)
Example application block diagram blood pressure monitor.
Heart Rate Monitor
Input Signals
OPA2333
MSP430F1222
heart generates electroHeart Bandpass Amplifier chemical impulse that spreads Signal Filter heart such fashion cause cells contract relax Digital Skin timely order thus give heart User Input Signal Thermistor Amplifier Temperature Processing pumping characteristic. This sequence initiated group nerve cells called sinoatrial (SA) node resultDisplay polarization depolarization cells heart. Because this action electrical nature because body conductive with graphics illustrates multifunction system measure heart rate skin temperature using OPA2333 fluid content, this electrochemical MSP430. action measured surface body.
Note:
"Heart Rate Monitor using MSP430FG439" (slaa280) www-s.ti.com/sc/techlit/slaa280
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
Blood Analyzer
Blood Analyzer
innovations blood analyzers making easier than ever test quickly number critical care assays blood such blood gases, glucose, electrolytes, coagulation, chemistries, hematology cardiac markers (cTnI). Also with advent digital technologies, invasive blood analyzers have become portable used measure major assays metabolic disorders blood system: glucose cholesterol. methods used blood measurement color reflectance method electromechanical sensor technology (amperometric method). analog front-end reflectance method uses optical sensors (LED, photo transistors) transimpedance amplifier. Measurements made using color reflectance method based upon intensity reaction color reaction layer test strip reflectance photometry. analyzer quantifies color change generates numerical value representative concentration cholesterol/glucose level blood. amperometric method, biosensor (test strip) directly connected with transimpedance amplifier. Cholesterol/glucose present blood while undergoing chemical reaction with test strip generates charge, which measured amperometric method. Especially amperometric method, ambient temperature measurement also necessary compensation test strip characteristics. measurement sequence usually controlled microcontroller (MCU). also takes care processing conversion results, storing measurements EEPROM Flash memory, controlling other functions such keypad, real-time clock, sound/speech compression serial communication connected audio output provided either circuit from DAC. Both used generate beeping sounds signal when measurement results available well generate voice instructions from speech-synthesizer software using, example, ADPCM compression algorithms. Measurement results stored together with measurement time date EEPROM Flash memory data that uploaded RS-232 interface.
MSP430 Microcontroller Control (LCD Driver, SPI, I2C) Audio Output (PWM/DAC) Digital I/Os Memory Transimpedance Amplifier Biosensor Speech/Sound
Keypad
Reference
Interface (RS232, USB, Wireless)
Example application block diagram blood analyzer.
Texas Instruments 2007
Medical Applications Guide
Consumer Portable Medical Devices
Digital Thermometers
MSP430 Microcontroller Digital I/Os Digital I/Os Comparator Keypad Memory
Digital Thermometers
Digital thermometers quickly replacing traditional mercury thermometers. Digital thermometers fast, accurate effective. With newer technologies, different types digital fever thermometers classified basis location where they used such oral, rectal, underarm, ear, etc. thermometer measures infrared heat eardrum, which reflects temperature hypothalamus temperature-controlling system brain. Infrared sensors used thermometers measurement, while thermopiles thermistors used other types. Depending cost considerations, different types digital thermometers available. High-end thermometers have number thermopiles thermistors, whose resistance changes with temperature. change resistance measured change voltage. This analog voltage converted digitally analog-to-digital converter (ADC). speed resolution this depends accuracy time which information needed. However, module available, then possible digitize analog signal using comparator timer, using slope conversion. This method generally used low-cost versions digital thermometers. single slope conversion simple method measuring temperature. Capacitance, supply voltage frequency changes caused aging temperature drift compensated using ratio metric measurement principle. Detailed information about slope conversion principle found application note "Implementing Ultra-Low-Power Thermostat with Slope Conversion" (SLAA129). block diagrams right show both low-end general-purpose high-end versions digital thermometers. Typical resolution used general-purpose digital thermometers 12-bit above depending accuracy level required. good reference also required better accuracy. microcontroller used control purposes. Low-cost solutions employ low-cost, low-power microcontroller like MSP430, which integrated comparator timer digitize analog signal using slope conversion technique. Other additional features like high temperature alarm, beep after measurement, auto shut-off data previous temperatures also featured thermometers. Most thermometers have easy-to-read displays, usually display low-battery indicator. Other peripherals include digital I/Os drivers.
Timer Control (LCD Driver I2C)
general block diagram low-cost digital thermometer.
MSP430 Microcontroller Thermopile Thermistor (>12 Bits) Digital I/Os Keypad Reference Memory
Control (LCD Driver I2C)
general block diagram digital thermometer with high accuracy.
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
Pulse Oximetry
Pulse Oximetry
pulseoximeter medical instrument monitoring blood oxygenation patient. measuring oxygen level heart rate, instrument sound alarm these drop below pre-determined level. This type monitoring especially useful newborn infants during surgery.
RS232 Pukse Rate LoBatt Heart Rate Circulation
SaO2 RMS(ir)/RSM (vr)]
MSP430
Zero Crossing InfraRed/ Samples Only InfraRed/ Normal Band Pass Filter DAC12_1 DAC12_0 Tracking Brightness Range Control InfraRed/ Normal
DeMUX
Probe Connector Gain
Select
Psuedo InfraRED Gain design non-invasive optical Analog Ground Cable ON/OFF pulseoximeter using MSP430FG437 Diode InfraRED ON/OFF microcontroller (MCU) consists Trans2nd Impedance IPin Diode Stage Amplifier peripheral probe combined with InfraRed displaying oxygen saturation pulse rate glass. same sensor used both heart-rate detection pulseoximetering this application. probe placed Apart from four transistors, only passive components needed this design. peripheral point body such finger tip, lobe nose. probe includes light emitting diodes (LEDs), visible spectrum (660nm) other infrared spectrum (940nm). percentage oxygen body determined measuring intensity from each P2.2 frequency light after transmitted through body then ratio between these intensities calculated.
ADC12
MS430FG437 DAC0
diagram right demonstrates implementation single-chip, portable pulseoximeter using ultra-low-power capability MSP430 MCU. Because high level analog integration, external components kept minimum. Furthermore, keeping time minimum power cycling light sources, power consumption reduced.
Probe Integrated LEDs
Infrared
Visible
P2.2
drive circuit.
More Information About Single-Chip Pulseoximeter Design Using MSP430, Visit:
www-s.ti.com/sc/techlit/slaa274
Texas Instruments 2007
Medical Applications Guide
Consumer Portable Medical Devices
Portable Medical
Features 120kB Flash/8kB Ultra-low-power operation Zero-power brown-out reset Complete system-on-chip: UART, SPI, I2C, IrDA OPA-ADC-MDA-DAC-OPA Voltage-programmable driver Trace buffer chip Easy Applications High-precision, battery-powered applications such Portable medical Portable industrial Low-power
MSP430FG461x Offers Complete System-on-Chip High-Precision, Portable Instrumentation
MSP430FG4616, MSP430FG4617, MSP430FG4618, MSP430FG4619
samples, datasheets, evaluation modules reports www.ti.com/sc/device/PARTnumber (Replace PARTnumber with MSP430FG4616, MSP430FG4617, MSP430FG4618 MSP430FG4619)
MSP430FG461x microcontroller (MCU) series designed high-precision, real-time portable applications that require highly integrated intelligent peripherals larger memory options single chip. MCU's extended memory model enables faster code execution that results reduction cycles full context store when addressing peripherals, Flash RAM. configurations complete with 16-bit timers, high-performance 12-bit converter, dual 12-bit converters, three configurable operational amplifiers, universal serial communication interface (USCI), universal synchronous/ asynchronous communication interface (USART), DMA, pins liquid crystal display (LCD) driver with regulated charge pump.
XIN/ XIN/ XT21n XT21n
DVCC1/2 DVSS1/2
AVCC
AVSS
P1.x/P2.x
P3.x/P4.x P5.x/P6.x
P7.x/P8.x P9.x/P10.x 4x8/2x16
Oscillators FLL+ MCLK
Flash (FG) (CG) 120kB SMCLK 116kB 93kB 92kB Copy
ADC12 12-Bit Channels
DAC12 12-Bit Channels Voltage
OA0, OA1, Amps
Ports P1/P2 Comparator Interrupt Capability
Ports P3/P4 P5/P6
Ports P7/P8 P9/P10 2x16
8MHz CPUX Incl. Registers
Controller Channels
Enahnced Emulation Only) JTAG Interface
Brownout Protection SVS/SVM
Hardware Multiplier MPY, MPYS, MAC, MACS
Timer_B7 Watchdog WDT+ 15/16-Bit Timer_A3 Registers Registers Shadow Basic Timer Real-Time Clock
LCD_A Segments
USCI_A0: UART, IrDA, USCI_B0: SPI,
USART1 UART,
RST/NMI
MPS430FG461x functional block diagram.
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
Portable Medical
15ppm/°C (max), 100µA, SOT23-3 Series Voltage References
REF3112, REF3120, REF3125, REF3130, REF3133, REF3140
samples, datasheets, evaluation modules reports www.ti.com/sc/device/PARTnumber (Replace PARTnumber with REF3112, REF3120, REF3125, REF3130, REF3133 REF3140)
1.8V, microPower CMOS Operational Amplifier Series
OPA333, OPA2333
samples, datasheets, evaluation modules reports www.ti.com/sc/device/OPA333 www.ti.com/sc/device/OPA2333
REF31xx family precision, low-power, low-dropout series voltage references. REF31xx does require load capacitor, stable with capacitive load sink/source 10mA output current. Unloaded, REF31xx operated supplies down above output voltage.
Product Voltage
REF3112 REF3120 REF3125 REF3130 REF3133 REF3140
1.25 2.048 4.096
OPA333 series CMOS operational amplifiers uses proprietary auto-calibration technique simultaneously provide very offset voltage (10µV max) near-zero drift over time temperature. These miniature, high-precision, quiescent current amplifiers offer high-impedance inputs that have common-mode range 100mV beyond rails rail-to-rail output that swings within 50mV rails. Single dual supplies +1.8V (±0.9V) +5.5V (±2.75V) used. OPA333 family offers excellent CMRR without crossover associated with traditional complementary input stages. This design results superior performance driving analog-to-digital converters (ADCs) without degradation differential linearity. Features offset voltage: 10µV (max) Zero drift: 0.05µV/°C (max) 0.01Hz 10Hz noise: 1.1µVPP Quiescent current: 17µA Supply voltage: 1.8V 5.5V Rail-to-rail input/output Packaging: SC70, SOT23 Applications Medical instrumentation Temperature measurements Battery-powered instruments Electronic scales Handheld equipment
4.096V REF3140 6.04k 150k 31.6k
Features dropout: High output current: ±10mA High accuracy: 0.2% (max) 115µA (max) Excellent specified drift performance: 15ppm/°C (max) from +70°C 20ppm/°C (max) from -40°C +125°C Applications Medical equipment Data acquisition systems Portable, battery-powered equipment Handheld test equipment
2.5V Supply
0.1mF
2.5V VOUT 1.25V REF3112 0.1µF 1.25V ADS8324 VREF DOUT 10µF Microcontroller 10µF
0.1mF
2.94k 6.04k 60.4
OPA333 Zero Adj.
DCLOCK
Type Thermocouple 40.7mV/°C
OPA333 temperature measurement circuit. Basic data acquisition system.
Texas Instruments 2007
Medical Applications Guide
Consumer Portable Medical Devices
System Support Products
Expansion
Often there enough GPIOs available microcontroller control desired peripherals, such controlling LEDs interfacing keypad. expander increase number GPIOs while taking minimal board space with 8-pin WCSP. Features Processor savings Improved board routing Reduced board space Applications Keypad control control Temperature sensing
Smallest Footprint Pins/Packages
Voltage Level Translation
operating voltage levels microcontrollers continue drop, void created between peripheral devices processors that disrupts interfacing between devices. TI's translators enable communication between incompatible I/Os with level translation between 1.2V, 1.5V, 1.8V, 2.5V nodes. MSP430 microcontroller shown many applications within this guide, 3.6V (max) tolerance: thus, translators used protect inputs interface higher voltage peripherals. Applications interface Interface devices with different supply voltages
Suggested Components
Component Description Range Power (µA)
Suggested Components
Component Frequency (Max) (kHz) Address Range -bit Width
SN74AVC1T45* Single-bit Dual-Supply Transceiver SN74LVC1T45 Single-bit Dual-Supply Transceiver SN74AVC2T45* Dual-bit Dual-Supply Transceiver SN74LVC2T45 Dual-bit Dual-Supply Transceiver SN74AUP1T57 Single-Supply Voltage Translator SN74AUP1T58 Single-Supply Voltage Translator SN74AUP1T97 Single-Supply Voltage Translator SN74AUP1T98 Single-Supply Voltage Translator PCA9306 Dual Bidirectional I2C-bus SMBus Voltage-Level Translator Bus-hold option available.
1.8V
1.65 1.65
6/WCSP (NanoStarTM) 6/WCSP (NanoStar) 8/WCSP (NanoStar) 8/WCSP (NanoStar) 6/WCSP (NanoStar) 6/WCSP (NanoStar) 6/WCSP (NanoStar) 6/WCSP (NanoStar) 8/US, WCSP
PCA9536 PCF8574 PCF8574A PCA9554 PCA9557 PCA6107 PCF8575 PCF8575C PCA9535 PCA9539 PCA9555
1000 0100 0111 0011 0011 0011 0100 0100 0100 1110 0100
Optional
RS-232
IrDA
Keypad
Pressure Sensor Silicon Pressure Load Cell 3.3V
LPV324 VREF TLV431B
Microcontroller with Integrated 12-/16-Bit Driver 2.5V Power Management Regulator
EEPROM Display
Level Translator VCCA VCCB VCCB 3.0V
Power Management Charge Pump Switching Regulator
3.3V
Motor
Example application block diagram.
1.8V
3.3V Peripheral
Example application block diagram.
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
System Support Products
Audio Signal Routing
most common applications analog switches signal routing. This routing from source multiple destinations from several sources single destination. single-pole, doublethrow analog switch used either situation. example, switch could used reroute output audio power amplifier different speakers. Another common application switching from audio amplifier baseband mobile audio power amplifier higher power output. Applications DeMUX internal/external speakers audio power amplifier Low-power routing (<100mA) Amplifier gain adjustment
USB-to-Serial Bridge
TUSB3410
samples, datasheets, reports evaluation modules www.ti.com/sc/device/TUSB3410
TUSB3410 TUSBWINVCP Software provide easy move your serial-based legacy device fast, flexible interface bridging between port enhanced UART serial port. TUSB3410 contains necessary logic communicate with host computer using bus. TUSBWINVCP software package enables TUSB3410 Virtual Port appear like legacy ports back your PCs. This enables your existing devices application software without changes either them. Features full-speed (12Mbps) compliant Integrated 8052 microcontroller with 16Kbytes that loaded from host from external onboard memory Integrated, enhanced UART features including: Programmable software/hardware flow control Automatic RS-485 transceiver control, with without echo Software-selectable baud rate from 921.6 kbaud Built-in, 2-channel controller USB/UART bulk TUSB3410UARTPDK product development jump-start your USB-to-serial development Applications Handheld meters Health metrics/monitors Legacy-free port replacement
3.6V
Suggested Components
Component Configuration Smallest Footprint Pins/Packages
TS5A3159A TS5A3166 TS5A23166 TS5A3153 TS5A6542 TS5A23159 TS5A26542 TS5A3359
SPDT SPST SPST SPDT SPDT SPDT SPDT SP3T
1.65 1.65 1.65 1.65 1.65 1.65 1.65 1.65
0.75 0.75
6/WCSP 6/WCSP 6/WCSP 8/WCSP 8/WCSP 10/Micro 12/WCSP 8/WCSP
TS5A3159A
External
Audio Power Internal
V-REG
Example application block diagram.
EEPROM Parameter Stroage
Host
TUSB3410 Controller
MSP430
12MHz
3728MHz
TUSB3410/MSP430 implementation block diagram.
Texas Instruments 2007
Medical Applications Guide
Consumer Portable Medical Devices
Wireless Interface, RFID Tag-itTag-it HF-I Family Product Specifications
Supported Standards Recommended Operating Frequency Factory Programmed Read Only Numbers Typical Programming Cycles +25°C) Data Retention Time +55°C) ISO/IEC 15693-2, ISO/IEC18000-3 13.56MHz 64-bits 100,000 years
Radio Frequency Identification (RFID)
TI's high frequency RFID product family consists 13.56MHz highfrequency (HF) transponders low-power RFID readers, which compliant with ISO/IEC 15693 ISO/IEC 18000-3 global open standards. Typical RFID implementations include applications such asset tracking, access control, blood tracking, medical supply tracking, patient/staff authentication, pharmaceutical authentication, medical imaging, product authentication, remote digital healthcare management well many non-medical related applications.
Features ISO/IEC 15693-2, ISO/IEC18000-3 User factory lock block Application Family Identifier (AFI) Standard 256-bit user memory, 32-bit FastSID 256-bit user memory, 32-bit Password-protected write command Command disable functionality FastSID Plus 2k-bit user memory, 6-bit Data Storage Format Identifier (DSFID) Combined inventory read block
RI-I03-112A RI-I15-112B RI-I16-112A RI-I17-112A
Tag-it HF-I Transponder Inlays
TI's Tag-it HF-I family transponder inlays consist 13.56MHz high-frequency (HF) transponders that compliant with ISO/IEC 15693 ISO/IEC 18000-3 global open standards. These products available different antenna shapes with frequency offset integration into paper, other substrates manufactured with TI's patented laser-tuning process provide consistent read performance. Prior delivery, transponders undergo complete functional parametric testing order provide high quality customers have come expect.
Tag-itHF-I Plus Inlay Shapes Part Number RI-I11-112A
RI-I11-112B
RI-I02-112A
RI-I02-112B
Available Memory Antenna size (mm) Foil Pitch (mm) Frequency Offset Lamination Material Delivery
2k-bits organized 32-bit blocks 50.8 0.1/ 50.8 0.1/ -0.4 -0.4 Paper
0.1/ -0.4 (~3.78 Paper
0.1/ -0.4 (~3.78
22.5 +0.1/ -0.4 (~1.89 Paper/PVC
101.6 +0.1/ -0.4
24.2 50.8 +0.1/ -0.4 Paper/PVC
32.5 50.8 +0.1/ -0.4 Paper/PVC
Single tape with 48mm foil width wound cardboard reel
Tag-itHF-I Transponder Inlays Part Number RI-I11-114A-S1
RI-I11-114B-S1
RI-I02-114A-S1
RI-I02-114B-S1
RI-I03-114-S1
RI-I16-114-S1
RI-I17-114-S1
Available Memory Foil Width (mm) Antenna size (mm) Foil Pitch (mm) Frequency Offset Lamination Material Delivery
256-bits organized 32-bit blocks 48mm ±0.5mm 50.8 +0.1/-0.4 50.8 +0.1/-0.4 Paper Single tape Wound cardboard reel
+0.1/-0.4 (~3.78 Paper
22.5 +0.1/-0.4 (~3.78 +0.1/-0.4 (~1.89 Paper/PVC
24.2 50.8 +0.1/-0.4 Paper/PVC
32.5 50.8 +0.1/-0.4 Paper/PVC
Tag-itHF-I Standard Transponder Inlays Part Number RI-I11-114A-01 RI-I11-114B-01
RI-I02-114A-01
RI-I02-114B-01
RI-I03-114-01
RI-I16-114-01
RI-I17-114-01
Available Memory Foil Width (mm) Antenna size (mm) Foil Pitch (mm) Frequency Offset Lamination Material Delivery
256-bits organized 32-bit blocks 48mm ±0.5mm 50.8 +0.1/-0.4 50.8 +0.1/-0.4 Paper Single tape wound cardboard reel
+0.1/-0.4 (~3.78 Paper
22.5 +0.1/-0.4 (~3.78 +0.1/-0.4 (~1.89 Paper/PVC
24.2 50.8 +0.1/-0.4 Paper/PVC
32.5 50.8 +0.1/-0.4 Paper/PVC
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
Wireless Interface, RFID Tag-itLow-Power, Multi-Standard RFID Readers
TRF7960,TRF7961
samples datasheets www.ti.com/sc/device/TRF7960 www.ti.com/sc/device/TRF7961
Complementing Tag-itHF-I family transponder inlays, TRF7960; highly integrated analog front data framing system 13.56MHz RFID reader system. Built-in programming options make useful wide range applications both proximity vicinity RFID systems. high level integration, excellent performance, miniature size multiple power modes allows TRF7960 used battery power-constrained medical applications. Features Supports ISO14443A/B, ISO15693 Tag-it Completely integrated protocol handling (OSI Model Layer below) Programmable output power: (100mW 200mW) Wide operating voltage range: 2.7V Separate, internal high-PSRR LDOs analog, digital sections provide noise isolation superior read range reliability Parallel 8-bit Serial 4-pin interface with 12-byte FIFO Seven, user selectable, ultra-low power modes Power down: <1mA Standby: 120mA Active:10mA only) High integration reduces total board area Integrated supply regulator Single Xtal system with available output clock MSP430 software libraries with Software Licensing Agreement available cost user-accessible programmable registers Package: Ultra-small 32-pin (5mm 5mm)
Applications Asset tracking Access control Blood tracking Medical supply tracking Patient staff authentication Pharmaceutical authentication Medical imaging data tracking Product authentication calibration Remote digital healthcare management many other non-medical related applications
Antenna
13.56
TRF796x
Control Registers Supply Regulators Dual Network Timing System Protocol Decoders/ Encoders Framing Gain Filters Digitizer
VDD_X
MSP430
Parallel Interface
SPI/Parallel
Interface
CLK_SYS
DVCC
Byte FIFO
Functional block diagram.
TRF7960 TRF7961 Evaluation Modules (EVMs)
TRF7960 TRF7961 EVMs evaluate performance TRF7960 TRF7961 multiple-protocol RFID transceivers. component incorporates analog front end, protocol handling, framing, error checking, multiple integrated voltage regulators with other features that allow reader customized/configurable application. TRF7961 features include: Supports 15693 standard Supports Texas Instruments Tag-itstandard Self contained on-board 13.56MHz loop antenna interface Communicates with host software Windows®-based through standard cable TRF7960 features TRF7961 EVM, adds: Support both 14443A standard 14443B standard (layer Protocol indication LEDs computer required indicate detection tag.
Texas Instruments 2007
Medical Applications Guide
Consumer Portable Medical Devices
Low-Power Products
Sub-1GHz System-on-Chip Solution
CC1110/F8/F16/F32
samples datasheets www.ti.com/sc/device/CC1110
Low-Power Multi-Channel Sub-1GHz Transceiver
CC1100
samples datasheets www.ti.com/sc/device/CC1100
CC1100 low-cost, single-chip transceiver designed very low-power wireless applications. small size, power consumption excellent radio performance, CC1100 used small, battery-operated medical applications sub-1GHz (Industrial, Scientific Medical) bands. Features current consumption: 14.5mA 1.2kbps, 433MHz, 15.5mA 0dBm, 433MHz High sensitivity: -110dBm 1.2kbps, packet error rate Frequency bands: 348MHz, 464MHz 928MHz Supply voltage: 1.8V 3.6V Excellent receiver selectivity blocking performance Many powerful digital features allow high-performance system made using inexpensive microcontroller Packaging: small QLP-20 (4mm 4mm) Applications Personal portable measurement products Handheld medical diagnostics Battery-powered instruments Medical equipment
32kHz 26MHz
CC1110 low-cost system-on-chip (SoC) designed low-power low-voltage wireless communication applications. CC1110 combines excellent performance CC1100 transceiver with industry-standard enhanced MCU, 8/16/32kB in-system programmable Flash memory, 1/2/4kB many other useful peripherals. Because several advanced low-power operating modes, CC1110 designed systems where very power consumption required. Features current consumption High-performance transceiver core (same CC1100) to14-bit with eight inputs general pins Real-time clock several timers 8/16/32kB in-system programmable Flash 1/2/4kB Packaging: QLP-36
128-Bit Encryption Engine
Timers: 8-Bit, 16-Bit with Mode
Antenna
MSP430
Chemical Sensors Self-Test Bias
USART/ USC/
CC1100/ CC2500
Network
Intl
GDOn
Keypad, Analog Sensor, Display with UART Interface, Compatible Audio Codec Other Peripherals Controlled
8-14 Bits Channel Temp. Sensor USART
8051 Core with Integrated Memory Management
Front-End Identical C1100
Digital (Including ADC)
1/2/4kb 8/16/32kb FLASH
Example application block diagram wireless blood analyzer.
also CC2500 low-power, 2.4GHz transceiver.
General-purpose medical device using CC1110. Supports secure link with embedded 128-bit hardware encryption.
also CC2510 CC2511 2.4GHz, system-on-a-chip solutions.
*Product release scheduled 2007.
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
Low-Power Products, ZigBeeZigBee Medical Applications
world going wireless medical applications exception. More more medical devices, especially patient monitoring, benefit from wireless ZigBee technology. With wireless sensors, patients move around hospital, even their homes, sensors will still monitor send critical health data hospital doctor. Being independent patient's exact geographical location positive impact both patient hospital. ZigBee standard enables companies have simple, reliable, low-cost low-power standard-based wireless platform their application development. TI's low-power portfolio highperformance offers robust cost-effective solutions variety medical devices.
Digital Analog Mixed
RESET_ XOSC_Q2 XOSC_Q1 P2_4 P2_3 P2_2 P2_1 P2_0 P1_7 P1_6 P1_5 P1_4 P1_3 P1_2 P1_1 P1_0 P0_7 P0_6
CC2430
RESET 32MHz Crystal 32.768kHz Crystal Debug Interface Watchdog Timer High Speed RC-OSC 3:2kHz RC-OSC Clock Calibration On-Chip Voltage Regulator Power Reset Brown Sleep Timer Sleep Mode Controller
(2.0 3.6V) DCOUPL
8051 Core
Memory Arbitrator
32/64/128kB Flash
Controller
Audio/DC Channels
Encryption Decryption
Control
Flash Write
Radio Registers CSMA/CS Strobe Processor
USART1 USART2 Timer (16-Bit) Timer IEEE 802.15.4 Timer Timer (8-Bit) Timer (8-Bit)
Radio Data Interface FIFO Frame Control
RF-ICs Compliant with IEEE 802.15.4/ZigBee Specifications
CC2420: Industry-leading transceiver provides maximum flexibility combined with microcontroller CC2430: True System-on-Chip (SoC) with integrated microcontroller CC2431: with integrated location capabilities Hardware development kits High-performance robust reference designs Free Z-Stack ZigBee 2006 compliant stack Free IEEE 802.15.4 software
P0_5 P0_4 P0_3 P0_2 P0_1 P0_0
Demodulator
Modulator
Receive Chain
Frequency Synthesizer
Transmit Chani
RF_P
RF_N
CC2430 functional block diagram.
ZigBee Software Development Suite
Z-Stack: Industry-leading ZigBee protocol stack from Z-Stack: Protocol stack extensions Z-Tool (debug tool)
Applications
Patient monitoring Hospital equipment tracking
more information visit: www.ti.com/zigbee
Texas Instruments 2007
Medical Applications Guide
Consumer Portable Medical Devices
Power Management Portable Devices
600mA Switch, Boost DC/DC TSOT-23
TPS61070
samples datasheets www.ti.com/sc/device/TPS61070
High PSRR LDOs Ultra-Small Packages
TPS71710
samples datasheets www.ti.com/sc/device/TPS71710
TPS717xx family low-dropout (LDO), low-power linear regulators offer very high power supply rejection (PSRR) while maintaining very 50µA ground current ultra-small 5-pin SC70 package. family achieves fast start-up, very noise, excellent transient response. TPS717xx stable with 1.0µF ceramic output capacitor uses precision voltage reference feedback loop achieve worst-case overall accuracy Features Input voltage range: 2.5V 6.5V Fixed output voltages: 0.9V 3.3V Adjustable output voltages: 0.9V 5.0V Rated output current: 150mA quiescent current: 50µA Stable with ceramic output capacitor 30µVRMS output noise, 100Hz 100kHz accuracy over load/line/temp Very high PSRR: 70dB 100Hz, 1kHz 67dB 10kHz, 100kHz 45dB 1MHz Package: SC70-5 6-pin SON, 1.5mm 1.5mm Applications applications noise applications Camera modules power supplies power supplies
Component IOUT (mA) (mV) (µA) PSRR 1MHz (dB)
TPS6107x synchronous DC/DC converter with integrated FETs providing peak power conversion efficiency >90% over very wide load range quiescent current 19µA. 1-cell 3-cell Alkaline/NiMH 1-cell Li-Ion battery-powered equipment benefit from 0.9V 5.5V input voltage range. 600mA switch current limit allows output current 75mA 3.3V from 0.9V input. Features Input voltage range: 0.9V 5.5V 75mA 3.3V VOUT 0.9V Switch current limit: 600mA efficient over wide load range Quiescent current: 19µA (typ) Shutdown current: 0.05µA (typ) Load disconnect during shutdown Adjustable output voltage 5.5V 1.2MHz switching frequency, synchronous Package: 1mm2 TSOT-23 Applications Portable medical devices needing higher voltage than supplied battery Simple backlighting
Small Inductor
VBAT VOUT 10µF 10µF 3.3V 100mA
0.9V 6.5V Input
TPS717xx
TPS61070
Synchronous Design
TSOT-23
Ceramic VOUT Ceramic
TPS717xx
Functional block diagram.
0.01µF (Optional)
Typical application circuit fixed voltage variations.
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
Power Management Portable Devices
Low-Cost, 1-Cell Li-Ion Charger with Current Sense QFN-10
bq24081 bqTINYGet samples datasheets www.ti.com/sc/device/bq24081
Li-Ion Li-Pol Battery Gauge Portable Applications
bq27010
samples, datasheets, evaluation modules reports www.ti.com/sc/device/bq27010
bq2408x highly integrated linear Li-Ion charge management optimized wall adapter charging single-cell Li-Ion Li-Polymer batteries. These highly integrated, single-cell Li-Ion battery charge management used low-dropout charger designs space-limited, portable applications. They require minimal external components integrating charge FET, reverseblocking circuitry current sense along with other battery management features. Features Integration: FET, reverse-current protection, current sense, thermal shutdown, 3mm2 QFN-10 Battery management: 4.2V, ±0.5% voltage regulation, charge termination, safety timer, optional temperature monitoring Autonomous power-source selection Battery pre-conditioning with safety timer bq24080 offers Charge Enable (CE) Power Good (PG) functions, bq24081 offers Timer Enable (TE) Temp Sense (TS) functions Applications portable medical device powered 1-cell Li-Ion charged from port
bq27010 (bqJUNIORTM) series highly accurate, stand-alone, single-cell, Li-Ion Li-Pol battery capacity monitoring reporting components targeted space-limited, portable applications. Compensation battery age, temperature, self-discharge discharge rate applied capacity measurements provide available time-to empty information across wide range operating conditions. component operate directly from single-cell communicates system over one-wire (bq27010) serial interface (bq27210). Features Reports accurate time-to-empty both measured host-requested load values Automatic capacity reduction with Reports temperature, voltage current Requires user calibration Programmable input/output port Dynamic end-of-discharge detection delay allow high-dynamic load environment Applications Portable medical Handheld devices
bq24081
Input Power STAT1 STAT2 ISET RSET Timer Enable
Li-Ion Li-Pol Battery Pack Pack+ Pack- bq27010 Temp 0.1µF PACK+ 0.1µF Li-Ion Li-Pd
0.1µF
GPIO
Functional block diagram.
0.020
0.1µF
0.1µF
Protection Li-Ion Protector PACK-
Functional block diagram.
Texas Instruments 2007
Medical Applications Guide
Consumer Portable Medical Devices
Component Recommendations Portable Medical Applications
Description Instrumentation Instrumentation Instrumentation Instrumentation Precision CMOS Amplifier microPower Class-AB Audio Class-AB Audio Class-AB Audio ADC, Serial ADC, Serial ADC, Serial VOUT VOUT VOUT VOUT Series Voltage Series Voltage Voltage Reference Drift, Bandgap microPower Bandgap Precision Reference Features ±50µV (max) input offset, 83dB CMRR, 0.06mA (typ) ±250µV (max) input offset, 83dB CMRR, 0.175mA (typ) ±500µV (max) input offset, 90dB CMRR, 0.04mA (typ) ±500µV (max) input offset, 90dB CMRR, 0.415mA (typ) 1.8V (min) 0.017mA (max)/ch 1.8V, 7MHz, 90dB CMRR, 5V/µs slew rate, 750µA/ch 1.8V, RRIO, 500µV input offset voltage, 500kHz 2.5V 5.5V supply, 1.25W output, 1.17mA/ch (min) load 2.5V 5.5V supply, 0.7mW output, 1.35mA/ch (min) load 2.5V 5.5V supply, 0.7mW output, 1.25mA/ch (min) load 1.2V, 12-bit, 200kSPS (max), 85dB SFDR 1.2V, 10-bit, 240kSPS (max), 80dB SFDR 1.2V, 8-bit, 280kSPS (max), 67dB SFDR 12-bit, 500kSPS, ±0.5LSB DNL, ±1LSB INL, 0.27mW power 16-bit, 0.093MSPS, ±1LSB DNL, ±64LSB INL, 2.7mW power 16-bit, 0.2MSPS, ±1LSB DNL, ±8LSB INL, power 16-bit, 0.15nV-s glitch, ±10µs 0.003%FSR settling time 100ppm/°C (max) temp coeff, 50µA accuracy 50ppm/°C (max) temp coeff, 50µA 0.2% accuracy 15ppm/°C (max) drift, dropout, 115µA (max) 0.2% (max) accuracy 0.2% (max) accuracy, 7ppm/°C (max) drift, 0.1mA (max) 0.1% (max) accuracy, 30ppm/°C (max) drift, 0.005mA (max) 0.05% accuracy, 3ppm/°C (max) drift, 6µVPP noise Flash, RAM, SPI+I2C Flash, RAM, UART/LIN IrDA Flash, RAM, UART/LIN IrDA Flash, RAM, UART, DMA, Flash, RAM, UART, DMA, Flash, RAM, UART, DMA, Flash, RAM, SVS, segment Flash, RAM, segment Flash, RAM, UART, SVS, segment Flash, RAM, UART, SVS, segment Flash, RAM, UART, SVS, segment Benefits Other Solutions
Component Recommendations
Component
Amplifiers
INA122 INA126 INA321 INA331 OPA333 OPA364 TLV276x TPA6203A TPA741 TPA751 ADS7866 ADS7867 ADS7868 DAC7551 DAC8534 DAC8551 DAC8560
References
Sensor amplification battery-powered systems Available 20µA/ch Speaker amplifier, mono, fully differential Speaker amplifier, mono, active high shutdown, depop Speaker amplifier, mono, active shutdown Very small, power Very small, power Very small, power Ultra-low glitch Quad Small with internal 2ppm/°C reference
OPA363, OPA2363, OPA2364, OPA4364
Data Converters
ADS7886 ADS7887 ADS7888 DAC7554 DAC8554 DAC8554, DAC8551, DAC8552 REF29xx REF30xx REF3130, REF3120 REF32xy, REF33xy
REF2912 REF3012 REF3140 REF32xx REF33xx REF50xx
Processors
load capacitor required Multiple output voltages, SOT23-6 Multiple output voltages, MSOP-8, SO-8 Multiple output voltages, SC71 12-bit 16-bit ADC, package 10-bit ADC, op.amps Analog comparator, multiplier 12-bit ADC, ch.12-bit DAC, analog comparator 12-bit ADC, ch.12-bit DAC, analog comp, multiplier 12-bit ADC, ch.12-bit DAC, analog comp, multiplier Analog comparator 16-bit ADC, 12-bit 16-bit 12-bit ADC, analog comparator 12-bit ADC, 12-bit DAC, DMA, amps
MSP430F20xx Ultra Power 16-bit MSP430F22x4 Ultra Power 16-bit MSP430F23x0 Ultra Power 16-bit MSP430F15x Ultra Power 16-bit MSP430F16x Ultra Power 16-bit MSP430F16xx Ultra Power 16-bit MSP430F41x Ultra Power 16-bit MSP430F42x0 Ultra Power 16-bit MSP430F42x Ultra Power 16-bit MSP430F43x Ultra Power 16-bit MSP430FG43x Ultra Power 16-bit
Preview components listed bold blue. products listed bold red.
Medical Applications Guide
Texas Instruments 2007
Consumer Portable Medical Devices
Component Recommendations Portable Medical Applications
Component Recommendations (Continued)
Component Description Features Flash, RAM, UART, SVS, segment Flash, RAM, UART/LIN IrDA, port, 3.3V supply, -40°C +85°C temp range ±15kV protection, 11pF capacitance, 6.1V (min) breakdown voltage compliance, enhanced UART port High protection level, high integration TPD4E001 Benefits 12-bit ADC, multiplier ch.12-bit ADC, ch.12-bit DAC, A-comp, amp, multiplier Other Solutions
Processors (Continued)
MSP430F44x Ultra Power 16-bit MSP430FG461x Ultra Power 16-bit
Interface
SN65220 TPD4E002 TUSB3410
Transient Suppressor Capacitance Array Full-Speed Enhanced Serial Port Bridge Battery Charger Battery Fuel Gauge Power Switches Boost Converter Dual Boost Converter Boost Converter Step-Down Converter Buck Boost Converter Low-Noise SingleChannel Controller
Power Management Products
bq2406x bq27010 TPS2041B TPS61081 TPS61100 TPS61200 TPS62300 TPS63000 TPS71710 UCC3804
Linear 1-Cell Li-Ion charger with thermal regulation, 6.5V OVP, temp sense Li-Ion Li-Pol battery gauge compliant power source, short circuit protection Input output isolation High efficient, dual boost converter High efficient, operates down 0.3V 500mA, 3MHz synchronous step-down converter Automatic transition between step down boost mode High bandwidth, very high rejection power source noise 12.5/8.3V on/off UVLO thresholds, 1MHz (max) frequency
Good space-limited designs with need battery safety Reports accurate time-to-empty battery Single chip power source solution memory cards Protection from short between pins between ground Long battery life, space savings, works over entire battery range Supper efficient boost that works over entire battery range Very small inductor high efficiency Produce mid-range voltage over entire range battery Low-noise power rails sensitive analog components Buck, boost, flyback, forward, current mode control
bq2410x bq27200, bq27500 TPS2051B, TPS2061 TPS61042 TPS61020 TPS61010 TPS62040 TPS621130 TPS759xx, TPS739xx UCC3809
Preview products listed bold blue. products listed bold red.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
ECG/Portable
This Section
Signal Acquisition Challenges
action potential created heart wall contraction spreads electrical currents from heart throughout body. spreading electrical currents create different potentials different points body, which sensed electrodes skin surface using biological transducers made metals salts. This electrical potential signal with bandwidth 0.05Hz 100Hz, sometimes 1kHz. generally around peak-to-peak presence much larger external high frequency noise plus 50/60Hz interference normal-mode (mixed with electrode signal) common-mode voltages (common electrode signals). common-mode comprised parts: 60Hz interference electrode offset potential. Other noise higher frequencies within biophysical bandwidth come from movement artifacts that change skin-electrode interface, muscle contraction electromyographic spikes, respiration (which rhythmic sporadic), electromagnetic interference (EMI), noise from other electronic components that couple into input. Some noise cancelled with high-input-impedance instrumentation amplifier (INA), like INA326 INA118, which removes line noise common both inputs amplifies remaining unequal signals present inputs; higher common-mode rejection (CMR) will result greater rejection. Because they originate different points body, left-arm right-arm signals different voltage levels amplified INA. further reject 60Hz noise, operational amplifier deriving common-mode voltage used invert common-mode signal drive back into patient through right using amplifier Only microamps less required achieve significant improvement stay within UL544 limit.
0.0015µF INA326 390k OPA2335 200k 750pF OPA2335 OPA2335 39pF Integrator (High-Pass Filter Path) 390k +2.5V Pedestal Voltage REF3125 OPA335 0.1µF 10µF 3.2M 0.1µF ADS8321 TMS320DSP MSP430
ECG/Portable Pulse Oximetry Ventilation Component Recommendations Ventilation Applications Automatic External Defibrillator (AED) Component Recommendations Applications Power Management Diagnostics
Component Recommendations ECG/Portable Component Recommendations Pulse Oximeter Applications
Biophysical Monitoring Overview
human medical data acquisition system, particular patient monitoring system, presents challenge designers measuring very small electrical signals presence much larger commonmode voltages noise. Front-end amplifiers perform essential conditioning that complements downstream digital processing, which turn refines measurement communicates with other systems. Biophysical measurements include electrical mechanical signals general monitoring, diagnostic scientific purposes both clinic non-clinic environments. Successfully meeting signal acquisition challenge requires system designers have knowledge signal source, good design practice with appropriate characteristics, features performance.
VIN- (Right Arm)
VIN+ VIN- 0.15 2mVPP
VIN+ (Left Arm)
VREF 2.5V
Possible Omit Depending Resistances.
390k Power Supply
Inverted Common-Mode VIN- Voltage (Right Drive)
OPA2335
Analog Circuit Common (Isolated from Earth Ground)
Three electrodes connected patient using CMOS components with single supply. This circuit will operate 3.3V supply.
Medical Applications Guide
www.ti.com/medical
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
ECG/Portable
Supply Voltage
most other applications, system supply voltage biophysical monitoring continues trend toward low, single-supply levels. While bipolar supplies still used, systems common trending single 3.3V supplies. This trend presents significant challenge designer faced with least 300mV electrode potential emphasizes need precision signal-conditioning solution. While following discussion concentrates single supply design, principles involved apply bipolar designs well. list recommended single bipolar supply components found below. left offset +300mV right electrode differential input voltage 300mV. Because instrumentation gain 1.5V appears output instrumentation amp. With gain more, output amplifier would drive signal never does because feedback integrator applies equal negative voltage reference point. Using this linear summing effect, electrode offset cancelled. result this restorator turn original DC-coupled amplifier into AC-coupled amplifier. With normal-mode voltage removed, output stage amplify signal without becoming saturated.
Frequency Response
Standard -3dB frequency bandwidth patient monitoring 0.05Hz 30Hz, while diagnostic grade monitoring requires 0.05Hz 100Hz more. analog front must coupled remove artifacts from electrode offset potential.
Instrumentation Amplifier Requirements
Stability gain (Gain High common-mode rejection input bias current (IB) Good swing output rail Very offset drift
Electrode Potential
Because electrode potential practice reach ±500mV, eliminating effects electrode potential coupling essential. restorator amplifier feedback configuration nulls offset.
Operational Amplifier Requirements
noise high gain (Gain 1000) Rail-to-rail output Very offset drift
DC/DC AC/DC 12-24V Step Down 5-10V DC/DC TPS54x0 REF32xx REF31xx DCH01xx
Digital
Analog
TPS799xx TPS795xx
TMS320F28xx
INA128 INA118 INA121 INA326 INA122 INA126 G=10 G=10
ADS834x ADS1258
TLC2254 OPA4348 TLV2434 OPA434x TLV2264
MSP430Fxx
Digital Signal Isolation ISO72X
SN65HVDxx
CH32/64 G=10 G=10
ECG/EEG block diagram.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
ECG/Portable
TMS320C28xController Generation, FixedPoint Control, Performance
TMS320C28x
samples, datasheets, tools reports
24-Bit, Fast Channel Cycling
ADS1258
samples, datasheets, evaluation modules reports www.ti.com/sc/device/ADS1258
TI's ADS1258 components have been used high-precision, multichannel applications such patient monitoring systems. sequentially cycle through 16-channels less than 675µs. Even though this low-noise, delta-sigma architecture, single-cycle (zero-latency) high-speed conversion programmed from 1.8k 23.7kSPS channel with loss performance. flexible input multiplexer accepts combinations differential single-ended inputs with full-scale differential range true-bipolar input range ±2.5V. differential output multiplexer accessible allow common input signal conditioning, such scaling filtering, prior input ADC. Additional internal system monitor registers provide supply voltage, temperature, reference voltage, gain offset measurement. Features 24-bits, missing codes Fixed automatic channel scan Fixed-channel data rate: 125kSPS Auto-scan data rate: 23.7kSPS 16-channel data <675µs Single-conversion settled data single-ended differential inputs 2.8µVRMS noise 1.8kSPS Excellent performance 0.0003% 0.02µV/°C offset drift 0.4ppm/°C gain drift GPIOs 32.768kHz crystal oscillator external clock Packaging: QFN-48 Applications Patient monitoring Test measurement systems Fast scan multi-channel instrumentation
AVDD Internal Monitoring Analog Inputs 16:1 Analog Input VREF DVDD GPIO[7:0]
TMS320C28x digital signal processor (DSP) 32-bit, fixedpoint C28xDSP core 150MIPS operation. features 1.8/1.9V core, 3.3V peripherals easy-to-use software development tools that speed time-to-market. Features Ultra-fast 20-40ns service time interrupts Powerful 20Mbit/s data logging debug capability 32-/64-bit saturation, single-cycle read-modify-write instructions, 64-/32-bit 32-/32-bit modulus division Enhanced tool suites with support Unique real-time debugging capabilities 32-bit single-cycle fixed-point Compatible with TMS320C24xDSP TMS320C2xLP source code Peripherals 128Kwords sectored Flash factory programmed (with code security) 12-bit A/D, fast 12.5MSPS throughput with 80ns (min) conversion time Flexible QEP, CAP, timers generation High-res mode resolution 16-bits 100kHz over 12-bits 1.5MHz ePWM frequency serial communication interfaces (SCI/UART) four serial peripheral interfaces (SPI) enhanced 2.0B modules McBSP interface
Code Security 256KBytes Sectored Flash/ROM XINTF* Memory 40KBytes 8KBytes Boot C281x
Watchdog Event Manager Event Manager 12-bit eDEP eCAP ePWM 12-bit Watchdog GPIO McBSP 2.0B SCI-A 2.0B
C280x
Interrupt Management
GPIO
150MIPS C28x32-bit 32-bit Multiplier 32-bit Timers Real-Time JTAG 32-bit Register File R-M-W Atomic
ADS1258
GPIO DRDY SCLK DOUT START RESET PWDN
SCI-B
24-Bit
Digital Filter
Interface
AINCOM AVSS Extclk In/Out
Oscillator
Control
*Available x2812 controller only.
32.768kHz DGND
ADS1258 functional block diagram.
TMS320C28x digital signal controller block diagram. C28xcontrollers 32-bit control-based DSPs with onboard reprogrammable Flash, factory programmed ROM, cost effective RAM-only memory options performance from 150MIPS.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
ECG/Portable
3.3V High-Speed Digital Isolators
ISO721, ISO722
samples, datasheets, evaluation modules reports www.ti.com/ISO721 www.ti.com/sc/device/ISO722
Low-Offset, Single-Supply Amps
OPA334, OPA335
samples, datasheets, evaluation modules reports www.ti.com/sc/device/OPA334 www.ti.com/sc/device/OPA335
ISO721 digital isolator logic input output buffer separated silicon oxide (SiO2) insulation barrier that provides galvanic isolation 4000V. Used conjunction with isolated power supplies, prevents noise currents data other circuits from entering local ground interfering with damaging sensitive circuitry. binary input signal conditioned, translated balanced signal, then differentiated capacitive isolation barrier. Across isolation barrier, differential comparator receives logic transition information, then sets resets flip-flop output circuit accordingly. periodic update pulse sent across barrier ensure proper level output. this DC-refresh pulse received more than 4µs, input assumed unpowered functional, fail-safe circuit drives output logic high state. Features 4000V isolation Fail-safe output Signaling rate 100Mbps 1577, 60747-5-2 (VDE 0884, Rev. 61010-1 Approved 25kV/µs transient immunity
Isolation Barrier Filter Pulse Width Demodulation VREF Carrier Detect BIAS (722 Only) Input Filter Channel Data Detect 3-State Output Buffer
OPA334 OPA335 CMOS amps auto-zeroing techniques simultaneously provide very offset voltage near-zero drift over time temperature. These high-precision amps offer high input impedance rail-to-rail output swing. Features offset voltage: (max) Zero drift: 0.05µV/°C (max) Quiescent current: 285µA Packaging: SOT23-5, SOT23-6, SO-8, MSOP-10 (dual) Applications Transducer applications Electronic scales Temperature measurement
OPA335
VOUT
VREF
Channel
OPA335 supply bridge amplifier.
VREF
ISO721 functional block diagram.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
ECG/Portable
4-/8-Channel, 16-Bit, Serial Output Portable Applications
ADS8341, ADS8342, ADS8343, ADS8344, ADS8345
www.ti.com/sc/device/PARTnumber (Replace PARTnumber with ADS8341, ADS8342, ADS8343, ADS8344 ADS8345)
Precision, Rail-to-Rail Instrumentation Amplifier
INA326
samples, datasheets, evaluation modules reports www.ti.com/sc/device/INA326
INA326 precision instrumentation amplifier with rail-to-rail input output with true single-supply operation offers very errors input common-mode ranges that extend beyond positive negative rails. Excellent long-term stability very noise assure offset voltage drift throughout life product. Features offset: 100µV (max) offset drift: 0.4µV/°C (max) Excellent long-term stability Very noise Input common-mode range: 200mV below negative rail 100mV above positive rail Wide output swing: within 10mV rails Single supply: +2.7V +5.5V Packaging: MSOP-8, MSOP-10 Applications Medical instrumentation Multi-channel data acquisition systems Low-level transducer amplifier bridges, load cells, thermocouples Wide dynamic range sensor measurements
ADS8341 4-channel, 16-bit with synchronous serial interface. Typical power dissipation 100kHz throughput rate supply. reference voltage varied between 500mV VCC, providing corresponding input voltage range VREF. tested down 2.7V operation. serial interface also provides low-cost isolation remote data acquisition. Features Conversion rate: 100kHz 4-/8-channel single-ended 2-channel differential input SINAD: 86dB Serial interface Single supply: 2.7V Packaging: SSOP-16 Applications Test measurement Data acquisition Battery-powered devices
DCLK
VIN-
VCH0 Comparator Four Channel Multiplexer Serial Interface Control SHDN DOUT BUSY
INA326 2(R2/R1)
CDAC
VREF
VIN+
ADS8341 functional block diagram.
INA326 functional block diagram.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Component Recommendations ECG/Portable
Component Recommendations
Component
Amplifiers
Description Instrumentation Instrumentation Instrumentation Instrumentation Right Drive Instrumentation Instrumentation FET-Input Amplifier Precision Delta-Sigma Delta-Sigma Delta-Sigma Delta-Sigma µPower Quad Charge-Digitizing
Features 110dB CMRR, (max) bias current, 50µV (max) offset 106dB CMRR, (max) bias current, 200µV (max) offset 175µA/ch supply, 3µV/°C (max) drift, 250µV (max) offset 120dB CMRR, (max) bias current, 50µV (max) offset 10µV offset, ±0.1µV/°C drift, 134dB open-loop gain 94dB CMRR 100), 500µV (max) offset, 7µV/°C (max) drift 120dB CMRR (G=100), 100µV (max) offset, 0.4µV/°C (max) drift 20pA (max) bias current, 90dB (min) CMRR, 1MHz 1.8V 17µA/ch 0.05µV/°C zero drift (max) (max) offset, 0.05µV/°C (max) drift, 40µA supply, 125µV (max) offset, 1.5µV/°C (max) drift, 32µA supply 24-bit, 40kSPS, ±0.0015% (max) nonlinearity, supply 24-bit, 30kSPS, ±0.0010% (max), input buffer, 1:64, supply 16-channel, 24-bit, 125k/23,7kSPS 24-bit, 105kSPS data rate, 109dB SNR, -108dB 16-bit, 100kSPS, 2.7V 5.5V supply 8-channel, 16-bit, 250kSPS, ±2.5V input range, parallel interface 16-bit, 250kSPS, 100dB SFDR, ±10V input range, interface Dual current input, 20-bit ADC, ±0.005% reading ±0.5ppm 0.2% (max) initial accuracy, 10ppm/°C (max) drift, 1.4mA (max) 0.05% (max) initial accuracy, 2.5ppm/°C (max) drift, 1.4mA (max) 0.2% (max) initial accuracy, 15ppm/°C (max) drift, 100µA 0.2% (max) accuracy, 7ppm/°C (max) drift, 0.1mA (max) 0.1% (max) accuracy, 30ppm/°C (max) drift, 0.005mA (max) 0.05% accuracy, 3ppm/°C (max) drift, 6µVPP noise Power efficient, high performance 32-bit fixed point code, 150MIPs operation 200MHz, dual MAC, very stand-by power 0.12mW
Benefits Bipolar supplies Bipolar supplies Bipolar supplies Bipolar supplies
Other Solutions
INA118 INA121 INA126 INA128 OPA277 INA321 INA326 OPA130 OPA333 OPA335 OPA336 ADS1252 ADS1255 ADS1258 ADS1271 ADS8325 ADS8342 ADS8509 DDC112
References
INA2126 (dual) OPA2277 (dual) OPA4277 (quad)
CMOS, zero-drift series, SC70, SOT23 SOT23 SOT23 power, fast conversion Complete measurement system Fastest multi-channel, delta-sigma ADC, measures inputs <675µs Designed multichannel systems power, small size Easy Single supply, high voltage High precision, true integrating function
OPA2333 (dual) OPA735, OPA333 OPA379 ADS1251, ADS1253, ADS1254 ADS1256 ADS1256, ADS1255, ADS8344 ADS1274, ADS1278 ADS8320, ADS8341
Data Converters
ADS8505, ADS8507, ADS8508 DDC114, DDC118, DDC232
REF02 REF102 REF3112 REF32xx REF33xx REF50xx
Processors
Precision VREF 10V, Ultra Precision Series Voltage Drift, Bandgap microPower Bandgap Precision Reference
Excellent line/load regulation, noise Excellent stability line/load regulation power consumption portable applications Multiple output voltages, SOT23-6 Multiple output voltages, MSOP-8, SO-8 Multiple output voltages, SC71 REF3120, REF3125, REF3133
TMS320C5000DSP TMS320F28xDSP TMS320VC5506
Combination performance integration Supported eXpressDSPand many other software packages tools
TMS320V5509A TMS320V5502
Preview products listed bold blue. products listed bold red.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Component Recommendations ECG/Portable
Description Features Flash, RAM, SPI+I2C Flash, RAM, UART/LIN IrDA Flash, RAM, UART/LIN IrDA Flash, RAM, UART, DMA, Flash, RAM, UART, DMA, Flash, RAM, UART, DMA, Flash, RAM, SVS, segment Flash, RAM, segment Flash, RAM, UART, SVS, segment Flash, RAM, UART, SVS, segment Flash, RAM, UART, SVS, segment Benefits 12-bit 16-bit ADC, package 10-bit ADC, op.amps Analog comparator, multiplier 12-bit ADC, ch.12-bit DAC, analog comparator 12-bit ADC, ch.12-bit DAC, analog comp, multiplier 12-bit ADC, ch.12-bit DAC, analog comp, multiplier Analog comparator 16-bit ADC, 12-bit 16-bit 12-bit ADC, analog comparator 12-bit ADC, 12-bit DAC, DMA, amps Other Solutions
Component Recommendations (Continued)
Component MSP430F20xx
Processors (Continued)
Ultra Power 16-bit MSP430F22x4 Ultra Power 16-bit MSP430F23x0 Ultra Power 16-bit MSP430F15x Ultra Power 16-bit MSP430F16x Ultra Power 16-bit MSP430F16xx Ultra Power 16-bit MSP430F41x Ultra Power 16-bit MSP430F42x0 Ultra Power 16-bit MSP430F42x Ultra Power 16-bit MSP430F43x Ultra Power 16-bit MSP430FG43x Ultra Power 16-bit MSP430F44x Ultra Power 16-bit MSP430FG461x Ultra Power 16-bit
Power Management Products
Flash, RAM, UART, SVS, segment 12-bit ADC, multiplier Flash, RAM, UART/LIN IrDA, Instant accuracy better than error over lifetime battery operation, ±0.4% charge voltage accuracy, integrated Multi-chemistry multi-cell sync switch-mode charger Battery pack full-protection analog front isolation, minimal external components quiescent current, programmable-delay 20VIN DC/DC with integrated switch FET, sync pin, enable 800mA switch, adjustable, dual output, positive negative boost Very high rejection power source noise ch.12-bit ADC, ch.12-bit DAC, A-comp, amp, multiplier Automatically adjusts battery aging, battery self discharge temperature inefficiencies Dynamic power management, multichemistry High efficiency, pack system protection functions Provides individual cell voltages battery voltage battery management host Safety isolation, removal ground loops Circuit initialization timing supervision Eliminate beat noise/ceramic caps/FPGA/integration supplies from switcher Low-noise power rails sensitive analog components TPS79501 bq20z70, bq20z80 bq24702
bq20z90 bq24703 bq24721C bq29330 DCH010505 TPS3808 TPS54350 TPS65130 TPS79901
Battery Fuel Gauge Battery Charger Battery Charge Management Battery Safety Galvanic Isolated, DC/DC Converters Voltage Supervisor DC/DC Converter Boost Converter Single Channel
DCH010512, DCH010515 DCR021205 TPS310x TPS54550
Preview products listed bold blue. products listed bold red.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Pulse Oximetry
Overview
pulse oximeter measures blood oxygenation sensing infrared light absorption properties deoxygenated oxygenated hemoglobin. comprised sensing probe attached patient's earlobe, finger that connected data acquisition system calculation display oxygen saturation level, heart rate blood flow. Light sources, typically light-emitting diodes, shine visible infrared light. Deoxygenated hemoglobin allows more infrared light pass through absorbs more light; highly oxygenated hemoglobin allows more light pass through absorbs more infrared light. oximeter senses calculates amount light those wavelengths proportional oxygen saturation desaturation) hemoglobin. Because light absorbance measurement, designer needs true "light-to-voltage" conversion using current input signal. classes photodiode amplifiers suitable pulse oximetry applications classical resistor-feedback transimpedance amplifier capacitor-feedback switched integrator. either amplifier configuration, resulting output voltage read analog-to-digital converter serialized MSP430 microcontroller TMS320DSP processing.
Signal Acquisition Challenges
resistor-feedback amplifier circuit shown right most common bioelectric transimpedance circuit. With amplifier used inverting configuration, light shining OPA353 photodiode produces small current Photodiode that flows amplifier summing junction through feedback resistor. Given very large feedback resistor value, this circuit extremely sensitive changes light intensity. example, input light signal just 0.001µW produce full-swing output.
Depending design requirements, very useful achieve output swing down below ground. auto-zero transimpedance amplifier configurations shown next page will allow swing ground Figure very close ground Figure pull-down resistor tied will allow swing slightly below ground minimize errors output gets very close zero volts.
Dual Supply
REF3140 +2.5V
Absorption
660nm 940nm
Photodiode
ADS8320 OPA340 OPA350
-2.5V
I940nm I660nm
Ratio Light Absorbance different wavelengths. HbO2
+2.5V OPA335 -2.5V
Wavelength [nm] 1000
Single Supply
REF3140
With that, oxygen saturation human blood:
Photodiode OPA340 OPA350
OPA335
ADS8320
SaO2
[O2-Hb] [O2-Hb] [Hb]
(Usually between 98%) calculated based Lambert Beer.
That shows resulting light dependency light source (Io), coefficient extinction that results from pic) "amount" each types either oxygenated deoxigenated.
40k*
*Optional pull-down resistor allow below ground output swing.
diagram shows different absorption spectra unloaded hemoglobin (Hb) oxygen loaded hemoglobin (HbO2).
Texas Instruments 2007
www.ti.com/medical
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Pulse Oximetry
IVC102 4.9V Photodiode CDIODE
TI's OPA380 monolithic combination high-speed OPA355 auto-zero OPA335 amps. offers 90MHz gain bandwidth product performs well 1MHz transimpedance amplifier with extremely high precision (25µV maximum offset maximum drift).
60pF
10pF
30pF
OPA380
Photodiode 20mV
(Optional Pulldown Resistor)
Digital Ground
Analog Ground
67pF 75pF
Logic Closes Switches Positive Negative Signal Integration CINT IIN(t)dt
Hold
Integrate
Hold
Reset
Depending design requirements, switched integrator very effective solution. TI's IVC102 does have thermal noise feedback resistor does suffer from stability problems commonly found transimpedance amps with large feedback resistor. Using photodiode with IVC102s will eliminate dark current ambient light errors, errors common both subtracted. Additionally, IVC102 allows synchronized sampling integer multiple line frequency, giving extremely high noise rejection. Transimpedance gain easily changed extending shortening integration time with switch Transimpedance Amplifier Requirements input bias current over temperature range interest input capacitance relative photodiode capacitance High gain bandwidth product voltage noise maximum precision, offset drift over temperature single-supply systems: Rail-to-rail input (including output operating photodiode photovoltaic (zero bias) mode Rail-to-rail output only operating photodiode photoconductive mode (biased) Shutdown and/or supply current battery-powered system
Design Hints small 1pF) capacitor feedback loop (CF) will control gainpeaking caused diode capacitance. Noise (voltage-output fluctuation) caused resistor noise, amplifier current noise, environmental noise pickup (e.g., 60Hz line noise). minimize noise circuit, designer should choose low-noise amplifier, select largest practical feedback resistor, shield amplifier inputs, include low-pass filtering good layout technique. photodiode shunt resistance much larger than that feedback resistor, offset voltage significant. offset voltage stability paramount, auto-zero solution including OPA335 best. achieve highest levels precision, system designers should choose OPA380. Designed meet exacting transimpedance application requirements, OPA380 provides unbeatable combination speed (85MHz over 1MHz transimpedance bandwidth) precision (25µV offset, drift, noise). discrete alternative OPA350 OPA355, adding OPA335 integrators-stabilized transimpedance configuration circuits requiring offset drift. Note that addition OPA335 integrator basic transimpedance amplifier will also reduce very frequency noise.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Pulse Oximetry
Mid-Range Solution Advantages:
Single-chip solution High resolution noise Wide input range adjustable integration time need correction diode current
AVDD CAP1A CAP1A CAP1B CAP1B CAP2A CAP2A CAP2B CAP2B Dual Switched Integrator TEST CONV Dual Switched Integrator Modulator Digital Input/ Output AGND VREF DVDD DGND
Precision Switched Integrator Transimpedance Amplifier
IVC102
samples, datasheets, evaluation modules reports www.ti.com/sc/device/IVC102
CHANNEL
DDC112
DCLK DVALID DXMIT DOUT RANGE2 RANGE1 RANGE0
Digital Filter
IVC102 precision integrating amplifier with amp, integrating capacitors low-leakage switches. integrates low-level input current user-determined period, storing resulting voltage integrating capacitor. IVC102 offers precise, lower-noise alternative conventional transimpedence circuits requiring very high-value feedback resistor, amplify low-level sensor currents from photodiodes ionization chambers. input signal current positive negative. Features On-chip integrating capacitors Gain programmed timing input bias current: 750fA (max) nonlinearity: 0.005% (typ) switch charge injection Fast pulse integration Applications Precision current measurement Photodiode measurements Ionization chamber measurements Current/charge-output sensors Leakage current measurement
IVC102 Ionized Chamber Photodiode Digital Ground 10pF 30pF 60pF
CHANNEL
Control
Mid-range solution block diagram.
High-End Solution Advantages:
Very high resolution High noise immunity differential input High noise immunity synchronization supply possible High noise immunity free access integration reset switches need correction diode currents Huge input range covered (>24-bit) free programmable integration times
IVC102a
VREF
ADS1255
MSP430
VREF
IVC102b
Analog Ground
High-end solution block diagram. IVC102 functional block diagram.
Logic Closes Switches
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Pulse Oximetry
1.1nV/ Noise, Low-Power, Precision
OPA211
samples, datasheets, evaluation modules reports www.ti.com/OPA211
Dual, Current-Input, 20-Bit Charge Digitizing
DDC112
samples, datasheets, evaluation modules reports www.ti.com/sc/device/DDC112
DDC112 dual input, wide dynamic range, charge-digitizing which allows low-level current output connected directly inputs. Charge integration continuous each input uses integrators; while being digitized, other integrating. addition internal programmable full-scale ranges, external integrating capacitors allow additional usersettable, full-scale range 1000pC. high-speed serial shift register, which holds result last conversion, configured allow multiple, cascaded DDC112s, minimizing interconnections. Features Single-chip solution measuring photodiodes High precision, true integrating function noise: 3.2ppm, Outstanding linearity: ±0.005% reading ±0.5ppm Programmable full-scale: 1000pc Single supply: supply Packaging: SO-28, TQFP-32 Applications Blood analysis Liquid/gas chromatography Direct photosensor digitization Infrared pyrometry
OPA211 series achieves very 1.1nV/ noise density with supply current only 3.6mA. offers rail-to-rail output swing maximize dynamic range. precision data acquisition systems, OPA211 provides <1µs settling time 16-bit accuracy even output swings. combining performance with only 100µV offset drift over temperature, OPA211 able drive fast, high-precision ADCs buffer outputs high-resolution DACs. Features Input voltage noise: 100nVPP, 0.1Hz 10Hz offset voltage: 100µV (max) offset voltage drift: 0.2µV/°C (typ) Supply current: 3.6mA/ch Gain bandwidth product: 80MHz 100) Slew rate: 27V/µs Supply range: ±2.25V ±18V, +4.5V +36V Output current: 30mA Unity gain stable Packaging: Tiny DFN-8, MSOP-8, SO-8 Applications Medical instruments Portable medical devices Ultrasound amplifiers Low-noise, low-power signal processing
AVDD CAP1A CAP1A CAP1B CAP1B CAP2A CAP2A CAP2B CAP2B
AGND
VREF
DVDD
DGND
CHANNEL
OPA2211
DDC112
DCLK Dual Switched Integrator DVALID DXMIT DOUT RANGE2 RANGE1 RANGE0
Modulator
Digital Filter
Digital Input/ Output
CHANNEL
Control Dual Switched Integrator TEST CONV
MSOP-8 OPA211
Enable
DDC112 functional block diagram.
MSOP-8
configurations. *Product release scheduled 2007.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Component Recommendations Pulse Oximeter Applications
Component Recommendations
Component
Amplifiers
Description Transimpedance Precision MicroAmplifierSeries Transimpedance High Speed Dual Current Input Voltage Reference Drift, Bandgap microPower Bandgap Precision Reference
Features Precision switched integrator 1.1nV/ noise 1kHz, 3.6mA/ch supply, 80MHz offset, drift, 350µA supply current 125µV offset, drift, 32µA supply current 500µV VOS, 38MHz, 2.5V supply High speed, single supply, rail-to-rail 1.8V, high CMR, RRIO, shutdown 90MHz GBW, over 1MHz transimpedance 25µV offset (max), drift (max) CMOS, rail-to-rail Very noise, high speed, CMOS 16-bit, 100kHz sample rate, 2.7V supply Wide dynamic range, charge digitizing, 20-bit 0.2% voltage accuracy 0.2% (max) accuracy, 7ppm/°C (max) drift, 0.1mA (max) 0.1% (max) accuracy, 30ppm/°C (max) drift, 0.005mA (max) 0.05% accuracy, 3ppm/°C (max) drift, 6µVPP noise Power efficient, high performance 32-bit fixed point code, 150MIPs operation 200MHz, dual MAC, very stand-by power 0.12mW Flash, RAM, SPI+I2C Flash, RAM, UART/LIN IrDA Flash, RAM, UART/LIN IrDA Flash, RAM, UART, DMA, Flash, RAM, UART, DMA, Flash, RAM, UART, DMA, Flash, RAM, SVS, segment Flash, RAM, segment Flash, RAM, UART, SVS, segment Flash, RAM, UART, SVS, segment Flash, RAM, UART, SVS, segment
Benefits
Other Solutions
IVC102 OPA211 OPA335 OPA336 OPA350 OPA353 OPA363 OPA380 OPA703 OPA725 ADS8320 DDC112
References
Unity gain stable, RRO, shutdown
OPA227 OPA735
OPA364
OPA727 microPower operation: 1.8mW 100kHz 2.7V Single-chip solution Precise trigger voltage Multiple output voltages, SOT23-6 Multiple output voltages, MSOP-8, SO-8 Multiple output voltages, SC71 ADS8321, ADS8325DDC101
Data Converters
REF31xy REF32xx REF33xx REF50xx
Processors
REF32xy, REF33xy
TMS320C5000DSP TMS320F28x Generation TMS320VC5506 MSP430F20xx Ultra Power 16-bit MSP430F22x4 Ultra Power 16-bit MSP430F23x0 Ultra Power 16-bit MSP430F15x Ultra Power 16-bit MSP430F16x Ultra Power 16-bit MSP430F16xx Ultra Power 16-bit MSP430F41x Ultra Power 16-bit MSP430F42x0 Ultra Power 16-bit MSP430F42x Ultra Power 16-bit MSP430F43x Ultra Power 16-bit MSP430FG43x Ultra Power 16-bit
Combination performance integration Supported eXpressDSPand many other software packages tools 12-bit 16-bit ADC, package 10-bit ADC, op.amps Analog comparator, multiplier 12-bit ADC, ch.12-bit DAC, analog comparator 12-bit ADC, ch.12-bit DAC, analog comp, multiplier 12-bit ADC, ch.12-bit DAC, analog comp, multiplier Analog comparator 16-bit ADC, 12-bit 16-bit 12-bit ADC, analog comparator 12-bit ADC, 12-bit DAC, DMA, amps
Preview products listed bold blue. products listed bold red.
TMS320V5509A TMS320V5502
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Component Recommendations Pulse Oximeter Applications
Description Features Flash, RAM, UART, SVS, segment Flash, RAM, UART/LIN IrDA, Linear 1-cell Li-Ion charger with thermal regulation, 6.5V OVP, temp sense Input output isolation High bandwidth, very high rejection power source noise Benefits 12-bit ADC, multiplier ch.12-bit ADC, ch.12-bit DAC, A-comp, amp, multiplier Good space-limited designs with need battery safety Protection from short between pins between ground Low-noise power rails sensitive analog components bq2410x TPS61042 TPS759xx, TPS739xx Other Solutions
Component Recommendations (Continued)
Component
Processors (Continued)
MSP430F44x Ultra Power 16-bit MSP430FG461x Ultra Power 16-bit
Power Management Products
bq2406x TPS61081 TPS71710
Battery Charger Boost Converter Low-Noise SingleChannel
Preview products listed bold blue. products listed bold red.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Ventilation
Portable Respiration Device
portable respiration device supports patient with correct dose oxygen. pressure sensor front valve measures breathe-in another after valve measures breathout pressure. microprocessor uses data from pressure sensors single flow sensor calculate output valve that regulating airflow. medical staff right flow touch screen pad. portable device, used ambulance example, sophisticated power management circuitry support mains battery operation. Future designs will likely equipped with wireless data transmission module.
Further Information
Pressure sensors play important role respiration equipment. page short tutorial pressure sensing techniques considerations.
Other Components Consider
DRV103 valve driver Power amplifier family OPA54x, OPA56x valve driver power management battery charging fuel gauge drivers Low-power wireless future designs RS-485 (SN65HVD3082), (SN65HVD251) other interface communication between sensor controller board
Adapter
Charger Mask Power Supply Pressure Sensor
Li-Ion Cell
Fuel Gauge
Valve Driver
Watchdog
Flow Sensor
Signal Conditioning
Display
Pressure Sensor
Backlight
Keypad
Portable Respiration Device
Bottle with Pressure Reducer
Portable respiratory device block diagram.
Texas Instruments 2007
www.ti.com/medical
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Ventilation/Pressure Discussion
Nonlinaerity (%FSR) Corrected Bridge Output Uncorrected Bridge Output
Pressure sensors convert physical value-weight, tire pressure, level, force, flow-into differential signal mV/V range referred metal thick-film, ceramic piezo-resistive. majority designers cost-effective piezo-sensors (25mbar 25bar). However, these very nonlinear, temperature dependent have large offset offset drift. Plus, they require attention electronic calibration compensation. block diagram (below) shows functional block diagram pressure signal conditioning system. Sensor Signal Conditioning performs necessary functions calibrate, compensate temperature variance, scale, linearize sensor signal. Analog/Digital Processing there ways convert linearize sensor signal. analog technique results analog solution provides analog output. This technique inexpensive fast, limited maximum 16-bit resolution. Digital more precise, 24-bits, provides digital output moderate speed. bridge excitation linearization circuit optimized bridge pressure nonlinearities with parabolic shape right). linearization circuit digitally programmable, pure analog signal conditioning side handled same process TI's well-known 4-20mA transmitters, such XTR105, XTR106 XTR108. heart PGA309 precision, low-drift programmable gain instrumentation amplifier using auto-zero technique includes programmable fault monitor over/underscale limiter. also offers digital temperature compensation circuit. Calibration carried either one-wire digital serial interface through two-wire industry-standard connection.
Power Supply
-0.3
Bridge Output (mV)
PGA309 bridge pressure nonlinearity correction.
Calibration parameters stored external nonvolatile memory eliminate manual trimming achieve long-term stability. evaluation module, PGA309EVM (see below) includes software calibration sheet easy evaluation your sensor PGA309 combination. highly integrated, CMOS PGA309, available TSSOP-16, tailored bridge pressure sensors adds TI's portfolio highly flexible, lowest noise amplifier instrumentation amplifier solutions that also include OPAx227, OPAx132, OPA335, OPA735, INA326, INA327, INA118 INA122.
RS232
VOUT 10nF
PGA309
Customer Sensor
PGA309 Interface Board Temperature Chamber
EEPROM
PGA309 Sensor Interface Board -40°C Temperature +125°C Pressure Input
Block diagram PGA390EVM module.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Ventilation
Continuous Positive Airway Pressure Machines TMS320C2000Get samples, datasheets, evaluation modules reports www.ti.com/c2000
Code Security 256KB Flash 36KB Boot TMS320C2000DSC Timers Watchdog GPIO
Continuous Positive Airway Pressure Machines (CPAP) effective means preventing intubation, decreasing mortality patients with acute respiratory failure, helping patients with sleep apnea reducing chronic respiratory failure. Designers CPAP machines concerned with efficiency running motor that drives continuous airflow patient, reducing many components system board lower cost easy development quicker time market. CPAP systems designers value TMS320C2000 Digital Signal Controller exceptional capabilities, including: TMS320C2000 digital signal controllers high-performance, low-cost that control motor speed, position torque real time. necessary these controllers even provide processing power executing high-sophisticated position speed estimation algorithms control motor using data from resolver, encoder halleffect sensor. These high-performance controllers only provide accurate control motor also provide additional MIPS peripheral integration host MCU. These perform 150MIPS have high level peripheral integration with on-chip flash, 12-bit, 16-channel with 12.5MSPS performance multiple GPIO pins designers single controller lower cost. C2000platform extensive motor control library (www.ti.com/c2000appsw) that help developer software framework necessary control either BLDC motor. addition, C-compiler efficiency eliminates need most assembly coding. Features MIPS reducing system cost On-chip programmable flash C-compiler efficiency eliminates need most assembly coding 12-bit ADCs with channels 12.5MSPS Independent complementary with deadband Independent duty-cycle phase control 150ps high-resolution Encoder interfaces event capture inputs 2.0B, SCI, SPI, port interfaces Long product life cycle assures supply continuity
Memory
Interrupt Management
C28x32-bit Multiplier Timers Real-Time JTAG Register File R-M-W Atomic
TMS320C2000digital signal controller block diagram.
Host Store Patient Data
Speed Control Back Sometimes Sensored
Patient Monitoring
Driver Inverter
Compressor: Brushless Motor
C2000Digital Signal Controller
TMS320C2000digital signal controller simplified patient monitoring system.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Ventilation/Pressure Discussion
Low-Side Driver Valves, Solenoids Coils
DRV103
samples, datasheets, evaluation modules reports www.ti.com/sc/device/DRV103
Complete Voltage-Output, Programmable Bridge Sensor Signal Conditioner
PGA309
samples, datasheets, evaluation modules reports www.ti.com/sc/device/PGA309
PGA309 programmable analog signal conditioner designed bridge sensors. analog signal path amplifies sensor signal provides digital calibration zero, span, zero drift, span drift, sensor linearization errors with applied stress (pressure, strain, etc.). calibration done one-wire digital serial interface through two-wire industry-standard connection. calibration parameters stored external nonvolatile memory (typically SOT23-5) eliminate manual trimming achieve long-term stability. Features Ratiometric absolute voltage output Digitally calibrated single-wire two-wire interface Eliminates potentiometer trimming Low, time-stable total adjusted error +2.7V +5.5V operation Packaging: Small TSSOP-16 Applications Bridge sensors Remote 4-20mA transmitters Strain, load, weight scales Automotive sensors
DRV103 low-side DMOS power switch employing pulsewidth modulated (PWM) output. rugged design optimized driving electromechanical devices such valves, solenoid, relays, actuators, motors positioners. operation conserves power reduces heat rise, resulting higher reliability adjustable allows fine control power delivered load. DC-toPWM output delay time oscillator frequency also externally adjustable. Features High output drive: 1.5A versions Wide supply range: +32V Complete function: Digitally controlled input output Adjustable internal oscillator: 500Hz 100kHz Adjustable delay duty cycle Fully protected: Thermal current limit shutdown with status indicator flag Packaging: SO-8, SO-8 PowerPADApplications Electromechanical driver: Solenoids, valves, positioners, actuators, relays, power contactor coils Hydraulic pneumatic systems Medical scientific analyzers Chemical processing Environment monitoring HVAC
VEXC
Linearization Circuit
Linearization
Non-Linear Bridge Transducer
Analog Sensor Linearization
Fault Monitor
Auto-Zero
Over/Under Scale Limiter Analog Signal Conditioning
Linear VOUT
Status Flag
DIGITAL
Digital Temperature Compensation Temp
Temp Temp Control Register Interface Circuitry EEPROM (SOT23-5)
Temp
DRV103
Thermal Shutdown Over Current 1.3V VREF Oscillator
DMOS
Flyback Diode
Load
PGA309 functional block diagram.
Input Delay IREF Delay Freq RFREQ
DMOS
2.75 IREF Duty Cycle RPWM
DRV103 functional block diagram.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Ventilation
High-Voltage, High-Current Operational Amplifier
OPA549
samples, datasheets, evaluation modules reports www.ti.com/sc/device/OPA549
High-Side Measurement Current-Shunt Monitor with Dual Comparators
INA206, INA207, INA208
www.ti.com/sc/device/PARTnumber (Replace PARTnumber with INA206, INA207 INA208)
OPA549 high-voltage, high current designed driving wide variety loads. provides low-level signal accuracy high output voltage current. internally protected against overtemperature conditions current overloads. addition, OPA549 provides accurate, user-selected current limit. Unlike other designs which "power" resistor series with output current path, OPA549 senses load indirectly. This allows current limit adjusted from with resistor/potentiometer, controlled digitally with voltage-out current-out DAC. Features High output current: continuous, peak Wide power supply range: Single supply: +60V Dual supply: ±30V Wide output voltage swing High slew rate: 9V/µs Control reference Fully protected: thermal shutdown, adjustable current limit Output disable control Package: 11-pin power package Applications Valve, actuator drivers Synchro, servo drivers Test equipment Transducer excitation Power supplies
INA206, INA207 INA208 family high-side, currentshunt monitors with voltage output, dual comparators voltage reference. INA206, INA207 INA208 sense drops across shunts common-mode voltages from -16V +80V. They also available with three output voltage scales: 20V/V, 50V/V, 100V/V with 500kHz bandwidth. incorporate open-drain comparators with internal 0.6V references. Comparator includes latching capability, Comparator user-programmable delay 14-pin versions. 14-pin versions also provide 1.2V reference output. Features Complete current sense solution Common-mode range: -16V +80V High accuracy: 3.5% (max) over temp Bandwidth: 500kHz Quiescent current: 1.8mA Packaging: SO-14, TSSOP-14, MSOP-10 Applications Medical equipment Power management Battery chargers Notebook computers
INA206, INA207, INA208
CMP1 IN+0.6V OPA549
ILIM sets current limit value from 10A. (Very power dissipation)
1.2V
VIN+ VIN- 1.2V CMP1 CMP2 CMP2 DELAY CMP1 RESET
CMP2 CMP2 IN+0.6V
Forced Low: Output disabled. Indicates Low: Thermal shutdown.
SO-14, TSSOP-14
INA206 functional block diagram.
OPA549 functional block diagram.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Component Recommendations Ventilation Applications
Description Features Benefits Wide supply range, thermal protection Thermal protection, adj. current limit Complete bridge sensor conditioner Fastest multi-channel, delta-sigma ADC, measures inputs <675µs Designed multi-channel systems Small size, power Zero latency, power Combination performance integration I2C, SPI, SCI, McBSP, SPI, SCI, I2C, SPI, 12-bit 16-bit ADC, package 10-bit ADC, op.amps Analog comparator, multiplier 12-bit ADC, ch.12-bit DAC, analog comparator 12-bit ADC, ch.12-bit DAC, analog comp, multiplier 12-bit ADC, ch.12-bit DAC, analog comp, multiplier Analog comparator 16-bit ADC, 12-bit 16-bit 12-bit ADC, analog comparator 12-bit ADC, 12-bit DAC, DMA, amps 12-bit ADC, multiplier ch.12-bit ADC, ch.12-bit DAC, A-comp, amp, multiplier High EMI, Glitch-free power-up/down inputs outputs
Preview products listed bold blue. products listed bold red.
Component Recommendations
Component
Amplifiers
Other Solutions OPA547, OPA548 OPA569
OPA549 OPA567 PGA309 ADS1258 ADS1271 ADS8325 ADS8472
Processors
Power Amplifier continuous, peak output current, slew rate Power Amplifier output, 150mV rails with output swing Prog. Sensor Conditioner Sensor error compensation: span, offset, temp drifts Delta-Sigma Delta-Sigma µPower 16-channel, 24-bit, 125k/23.7kSPS 24-bit, 105kSPS, serial interface, w/FSYNC 16-bit, 100kSPS, 2.7V 5.5V supply 16-bit, 1MSPS, ±0.4LSB (typ) 32-bit fixed point code, 150MIPs operation 100MIPS, ROM, 36KB RAM, 128KB Flash, 12-bit 150MIPS, ROM, 36KB RAM, 256KB Flash, 12-bit 60MIPS, ROM, 12KB RAM, 32KB Flash, 12-bit Flash, 128B RAM, SPI+I2C 32KB Flash, RAM, UART/LIN IrDA 32KB Flash, RAM, UART/LIN IrDA 32KB Flash, RAM, UART, DMA, 60KB Flash, RAM, UART, DMA, 55KB Flash, 10KB RAM, UART, DMA, Flash, 256B RAM, SVS, segment 32KB Flash, 256B RAM, segment 32KB Flash, RAM, UART, SVS, segment 32KB Flash, RAM, UART, SVS, segment 60KB Flash, RAM, UART, SVS, segment 60KB Flash, RAM, UART, SVS, segment 120KB Flash, RAM, UART/LIN IrDA, -27V bus-fault protection, meets exceeds ISO11898-2 unit load nodes bus, 15kV protection
Data Converters
ADS1251, ADS1253, ADS1212 ADS1274, ADS1278, ADS1284 ADS8320, ADS8341, ADS8344
TMS320F28xDSP Digital Signal Controller Digital Signal Controller Digital Signal Controller Ultra Power 16-bit MSP430F22x4 Ultra Power 16-bit MSP430F23x0 Ultra Power 16-bit MSP430F15x Ultra Power 16-bit MSP430F16x Ultra Power 16-bit MSP430F16xx Ultra Power 16-bit MSP430F41x Ultra Power 16-bit MSP430F42x0 Ultra Power 16-bit MSP430F42x Ultra Power 16-bit MSP430F43x Ultra Power 16-bit MSP430FG43x Ultra Power 16-bit MSP430F44x Ultra Power 16-bit MSP430FG461x Ultra Power 16-bit
Interface
TMS320F2808 TMS320F2812 TMS320F28015 MSP430F20xx
SN65HVD1050 Transceiver SN65HVD3082 RS-485 Transceiver
HVD234 3.3V version
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Component Recommendations Ventilation Applications
Component Recommendations (Continued)
Component bq2406x bq27010 TPS2041B TPS23750 TPS61042 TPS63000 TPS62300 TPS79901 Description Battery Charger Battery Fuel Gauge Power Switches Power-over-Ethernet Boost Converter Buck Boost Converter Step-Down Converter Low-Noise-SingleChannel Features Linear 1-cell Li-Ion charger with thermal regulation, 6.5V OVP, temp sense Li-Ion Li-Pol battery gauge compliant power source, short-circuit protection interface DC/DC controller Current source with overvoltage protection Automatic transition between step down boost mode 500mA, 3MHz synchronous step-down converter Very high rejection power source noise Benefits Good space-limited designs with need battery safety Reports accurate time-to-empty battery Single-chip power-source solution memory cards Transmit power data remote devices over ethernet cable Simple backlight boost improved visibility Produce mid-range voltage over entire range battery Very small inductor high efficiency Low-noise power rails sensitive analog components Other Solutions bq2410x bq27200 TPS2051B, TPS2061 TPS2384 TPS61140 TPS621130 TPS62040 TPS793xx, TPS795xx
Power Management Products
Preview products listed bold blue. products listed bold red.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Automatic External Defibrillator (AED)
body depolarize most heart cells, which often re-establishes coordinated contractions normal rhythm. amount flowing current determined capacitor body impedance. accompanying graph shows level current length time current flows through body. Many jurisdictions medical directors also require that record audio from scene cardiac arrest post-event analysis. AEDs include means store retrieve patient patterns. front-end signals come from electrodes placed patient, which requires instrumentation amplifier amplify very small amplitude (<10mV). instrumentation amplifiers INA118/INA128/INA326 designed have: Capability sense low-amplitude signals from 0.1mV 10mV, Very high input impedance (>5M), Very input leakage current (<1µA), Flat frequency response 0.1Hz 100Hz High common-mode rejection ratio (CMRR) (>100dB).
automated external defibrillator (AED) highly sophisticated microprocessor-based device that monitors, assesses automatically treats patients with life-threatening heart rhythms. captures signals from therapy electrodes, runs ECG-analysis algorithm identify shockable rhythms, then advises operator about whether defibrillation necessary. basic defibrillator contains high-voltage power supply, storage capacitor, optional inductor patient electrodes (see block diagram). develops electrical charge capacitor certain voltage, creating potential current flow. higher voltage, more current potentially flow. outputs audio instructions visual prompts guide operator through defibrillation procedure. typical defibrillation sequence, provides voice prompts instruct user attach patient electrodes starts acquiring data. analyzes patient's detects shockable rhythm, capacitor charged according energy stored capacitor, 1/2CV2; capacitor voltage, Vc(t) Vc(0)e-t/RC, where R(lead) <<R(chest). Then, following instructions, operator presses shock button deliver high-voltage pulse; current begins flowing through
Voice
MSP430 Microcontroller
MOSFET Output Stage
Generator
Power Management 3.3V, 1.8V
Charger
Fuel Gauge Battery
Pads
Switch
Diagnostic TMS320DSP
System diagram.
Medical Applications Guide
www.ti.com/medical
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Automatic External Defibrillator (AED)
other front-end signal microphone input recording audio from scene cardiac arrest. Both microphone input digitized processed DSP. Most designs 16-bit processor therefore work well with 16-bit ADCs digitize voice input. amplified signal bandwidth 0.1Hz 100Hz requires minimum 50dB. audio recording/playback signal typically bandwidth 8kHz requires minimum 65dB. microphone input also needs amplified with maximum programmable gain 40dB. have synthesized audio instruction with volume control output either headphone speaker speaker. System designers will find that TLV320AIC20 makes front-end digitization very easy simple because integrates ADCs, DACs, microphone amplifier, headphone driver driver with volume control; gluelessly interfaced DSP.
200J Monophasic 200J Biphasic Current 130J Biphasic
Time (ms)
Typical drive current. AEDs deliver either monophasic biphasic defibrillation waveforms heart. Monophasic delivers current that travels direction throughout shock. Newer biphasic technology allows current reversed partway through shock thus potentially lessening risk burns myocardial damage.
Display Compact Flash Memory Card RS232/ Interface
Keypad
OMAP59xx Processor 1.8V/3.3V ARM® Memory TPS61042 Driver ADS8321 TLV320AIC12/20 Serial Port Input TPA2005D1 Serial Port McBSP
Memory
TPS61045 Bias
TPS3836 Supervisor
H-Bridge Timing/Capacitor Charge Control 1-Wire Battery Pack Protection Charger UCC38C42 Current Controller 2000V Transformer Circuit TPS5130 Buck Controller
INA326 INA118
OPA335 OPA130
Fuel Gauge
Instrumentation/ Operational Amplifiers
Components
block diagram.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Automatic External Defibrillator (AED)
Embedded Applications Processor
OMAP5912
samples, datasheets, evaluation modules reports www.ti.com/sc/device/OMAP5912
Single-Supply, microPower, RRO, CMOS Instrumentation Amplifier
INA321
samples, datasheets, evaluation modules reports www.ti.com/sc/device/INA321
INA321 rail-to-rail output, CMOS instrumentation that provides amplification differential signals with microPower current consumption 40µA. features <1µA current consumption standby mode returns normal operation microseconds making good choice low-power battery multiplexing applications. Configured internally 5V/V gain, INA321 offers exceptional flexibility with user-programmable external gain resistors. reduces common-mode error over frequency with CMRR remaining high 3kHz, line noise line harmonics rejected. Features quiescent current: 40µA/ch High gain accuracy: 2ppm/°C, 0.02%, offset voltage: ±200µV High CMRR: 94dB bias current: 10pA Bandwidth: 500kHz, 5V/V Gain with external resistors Packaging: MSOP-8 (single); TSSOP-14 (dual) Applications Physiological amplifier: ECG, EEG, Test equipment Differential line receivers with gain Industrial sensor amplifier: bridge, RTD, thermistor, position
160k 160k
dual-core OMAP59xx processor integrates TMS320C55xDSP core with ARM9 core single chip optimal combination application performance power consumption. This unique architecture offers attractive solution both ARM® developers, providing low-power, real-time signal processing capabilities coupled with command control functionality ARM. Features Extensive peripheral supporting glueless interface multiple radio technologies (GSM/GPRS, WLAN, Industry-leading C55xDSP core offering portable data terminalcentric algorithms Third Party Network Multibus architecture system-level optimization On-chip frame buffer supporting multiple display variations Hardware encryption engine enabling industry-standard security applications Robust man/machine interface ARM9 core multiple operations Applications Video imaging processing Graphics video acceleration Data processing Mobile communications
OMAPProcessors
C56x 16-Channel SDRAM Mobile Flash SRAM NAND 96MHz 48MHz Traffic Controller/ Memory
Ctrl McBSP (x2) MCSI (x2) UART (x2) UART/IrDA NAND Flash Mailbox Timer (x2) (Master) GPIO (>50) McBSP2 32k-Sync Timer Timer MMGS0102 Timer (x2) (x2) PWU/PWT SO/MMC (x2) Ctrl µwire ARMIO/ Camera
926EJ
VIN- VIN+ Gain 5(R2/R1) VOUT (VIN+ VIN-) Gain
Ctrl
(18b Multi Std: e.g., TFT, STN, etc.)
256kB ISRAM
(Frame Buffer)
Hardware Encryption Engine
OMAP5912 peripheral block diagram.
Shutdown
INA321 functional block diagram.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Power Management Diagnostics
Single- Dual-Output, Isolation DC/DC Converter Family
DCH010505
samples datasheets www.ti.com/sc/device/DCH010505
High-Voltage Boost Converter with 0.5A/1.3A Current Switch Power Diode
TPS61080, TPS61081
samples, datasheets, evaluation modules reports www.ti.com/sc/device/TPS61080 www.ti.com/TPS61081
DCH01 series miniature DC/DC converters with isolation UL60950 certified. These unregulated converters accept input deliver single dual outputs 15V. Offering high performance cost, DCH01 converters operate efficiency. units have industry standard SIP-7 footprint. They only their product space with open-frame package, contributing excellent thermal performance high reliability. signal chain applications such PLC, Fieldbus data acquisition, including those using TI's ISO721 high-speed digital isolator, DCH01 used ground loop elimination. addition isolated applications, DCH01 converters also used non-isolated applications that require low-cost generation split-supply. Features Output power: Unregulated DC/DC converter input (4.5V 5.5V range) 12V, single dual output models UL60950 recognized 3kVdc isolation Efficiency: Industry standard SIP-7 footprint Applications Medical instrumentation Ground loop elimination Industrial control instrumentation Test equipment Programmable logic controller
TPS60180 TPS60181 1.2MHz/600kHz fixedfrequency boost converters designed portable devices. highly integrated converters incorporate power switch, input/output isolation switch power diode. Under short-circuit conditions (detected measuring input current) isolation switch opens disconnect output from input. This protects converter, protects input source from output short, guards against shorts between single ground (except pin). converter also isolates output from input during shutdown prevent leakage current. Features Input voltage range: 2.5V Output voltage: 0.5A integrated switch (TPS61080) 1.3A integrated switch (TPS61081) 12V/400mA 24V/170mA from input (typ) Integrated power diode 1.2MHz/600kHz selectable fixed switching frequency Input-to-output isolation Short-circuit protection efficiency Applications 3.3V 12V, boost converter White backlight media form factor display TFT-LCD bias supply
4.7µH Strings 10.5V/200mA
TPS61081
4.7µH PGND
4.7µH
Power Controller
Signal
RSET
VLCF 5020 T-4R7N1R7-1 Murata J475 Murata C475
Power Controller
WLEDs driver with dimming display.
Single- dual-output block diagrams.
Texas Instruments 2007
Medical Applications Guide
Diagnostic, Patient Monitoring Therapy
Power Management Diagnostics
4.5V Input, Converters
TPS54350, TPS54550
samples, datasheets, evaluation modules, reports software tools www.ti.com/sc/device/TPS54350 www.ti.com/sc/device/TPS54550
1.6MHz, Input, DC/DC Synchronous Buck Converter
TPS54317
samples, datasheets, evaluation modules, reports software tools www.ti.com/sc/device/TPS54317
Features Input voltage range: (4.5A peak) integrated MOSFETs provide synchronous rectification Adjustable/synchronizable switching frequency 1.6MHz Output voltage adjustable down 0.9V Power good, enable, adjustable slow-start, current limit, thermal shutdown accuracy Supported free SwitcherProdesign software Applications* TMS320C64xDSPs Altera® Cyclone® Stratix® Stratix Stratix Xilinx® Spartan®-3 family, Virtex®-5 Core power supplies
TI's reference other companies' products does constitute TI's recommendation approval such products application.
Other Low-Voltage SWIFTComponents*
Features Input voltage range: 4.5V Synchronous buck high efficiency Adjustable output voltage down 0.9V Power good, enable, adjustable slow-start, current limit, thermal shutdown 180° out-of-phase switching TPS54350 TPS54550 footprint compatible Fixed 250kHz, 500kHz, adjustable switching frequency Applications* TMS320C64xDSPs Altera Cyclone Stratix Stratix Stratix Xilinx Spartan-3 family, Virtex-5 Core power supplies
TI's reference other companies' products does constitute TI's recommendation approval such products application.
Mid-Voltage SWIFTComponents
Range Part Number TPS54310 TPS54610 TPS54910 TPS54010 Same feature TPS54317
IOUT
Frequency 700kHz 700kHz 700kHz 700kHz
Package 20HTSSOP 28HTSSOP 28HTSSOP 28HTSSOP
Range IOUT Part Number Compensation TPS54350 External TPS5435x Internal* TPS54550 External Fixed output versions available (1.2, 1.5, 1.8, 3.3V)
Package 16HTSSOP 16HTSSOP 16HTSSOP
TPS54350 TPS54550*
SYNC Input Voltage BOOT Output Voltage
TPS54317
Input PWRGD SS/ENA SYNCH VBIAS AGND VSENSE BOOT PGND Output
PWRGD SS/ENA VBIAS COMP
VSENSE PWRPAD PGND
COMP
TPS54317 functional block diagram.
*Note: TPS54350 TPS54550 footprint compatible.
Functional block diagram.
Medical Applications Guide
Texas Instruments 2007
Diagnostic, Patient Monitoring Therapy
Component Recommendations Applications
Component Recommendations
Component
Amplifiers
Description Instrumentation Instrumentation Precision Class-D Audio Delta-Sigma ADC, Serial µPower Data Acquisition System Dual-Channel Codec Audio Codec Touch Screen Controller Touch Screen Controller
Features 110dB CMRR, (max) bias current, 50µV (max) offset 175µA/ch supply, 3µV/°C (max) drift, 250µV (max) offset 1.8V 17µA/ch 0.05µV/°C zero drift (max) 1.4W output power, 75dB PSRR, 2.8mA/ch load (min) 16-bit, 128SPS (max), ±8LSB (max), serial interface 20-bit, 25kSPS (max), 24-bit, 40kSPS, 0.0015% (max) 1.2V, 12-bit, 200kSPS (max), 85dB SFDR
Benefits Bipolar supplies Bipolar supplies CMOS, zero-drift series, SC70, SOT23
Other Solutions
INA118 INA126 OPA333 TPA2005D1 ADS1100 ADS1250 ADS1252 ADS7866 ADS8325 MSC1210 TLV320AIC20 TLV320AIC26 TSC2003 TSC2046
References
INA2126 (dual) OPA2333 (dual)
Data Converters
External reference, self-calibrating, delta-sigma Data acquisition system, delta-sigma 2-wire synchronous serial interface
ADS1251, ADS1252 ADS1251, ADS1253, ADS1254, ADS7866 ADS8320, ADS8841, ADS8344
Small size, power Enhanced 8051 core with Flash memory 24-bit 16-bit, 266kSPS, 81dB ADC, 78dB 24-bit, 53kSPS, 2.7V 3.6V supply, I2S, interfaces interface standard, fast, high-speed modes voltage I/O, touch pressure measurement, 2.2V 5.2V operation 0.2% (max) initial accuracy, 15ppm/°C (max) drift, 100µA 0.2% (max) accuracy, 7ppm/°C (max) drift, 0.1mA (max) 0.1% (max) accuracy, 30ppm/°C (max) drift, 0.005mA (max) 0.05% accuracy, 3ppm/°C (max) drift, 6µVPP noise Flash, 128B RAM, SPI+I2C 32KB Flash, RAM, UART/LIN IrDA 32KB Flash, RAM, UART/LIN IrDA 32KB Flash, RAM, UART, DMA, 60KB Flash, RAM, UART, DMA, 55KB Flash, 10KB RAM, UART, DMA, Flash, 256B RAM, SVS, segment 32KB Flash, 256B RAM, segment 32KB Flash, RAM, UART, SVS, segment 32KB Flash, RAM, UART, SVS, segment 60KB Flash, RAM, UART, SVS, segment 60KB Flash, RAM, UART, SVS, segment
Fully compatible with TMS320C54xDSP power supplies Low-power stereo DAC, mono with speaker Direct battery measurement ADS7845, TSC2000, TSC2007 QSPIand
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