LMC8101
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LMC8101 - LMC8101
LMC8101 Rail-to-Rail Input Output, 2.7V micro package with Shutdown
LMC8101 Rail-to-Rail Input Output, 2.7V micro package with Shutdown
LMC8101 Rail-to-Rail Input Output high performance CMOS operational amplifier. LMC8101 ideal voltage (2.7V 10V) applications requiring Rail-to-Rail inputs output. LMC8101 supplied sized micro well MSOP packages. micro package requires less board space compared SOT23-5 package. LMC8101 upgrade industry standard LMC7101. LMC8101 incorporates simple user controlled methodology shutdown. This allows ease while reducing total supply current typical. This extends battery life where power saving mandated. shutdown input threshold relative either using (see Application Note section details). Other enhancements include improved offset voltage limit, three times output current drive lower noise when compared industry standard LMC7101 Amp. This makes LMC8101 ideal many battery powered, wireless communication Industrial applications.
Features
2.7V, 25°C, V+/2, Typical values unless specified. Rail-to-Rail Inputs Rail-to-Rail Output Swing Within 35mV Supplies Packages Offered: micro package 1.39mm 1.41mm MSOP package 3.0mm 4.9mm (max) Supply Current Shutdown Current (max) Versatile Shutdown feature 10µs turn-on Output Short Circuit Current 10mA (max) Offset Voltage Gain-Bandwidth 1MHz Supply Voltage Range 2.7V-10V 0.18% Voltage Noise
Applications
Portable Communication (voice, data) Cellular Phone Power Control Loop Buffer Active Filters Battery Sense Loop
Connection Diagrams
8-Pin MSOP micro
DS101240-79
View
DS101240-80
View
1999 National Semiconductor Corporation
DS101240
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Ordering Information
Package Ordering Information LMC8101BP LMC8101BPX LMC8101MM LMC8101MMX Drawing Number BPA08EFB MUA08A Package Marking Supplied Units Tape Reel Units Tape Reel Units Tape Reel 3.5k Units Tape Reel
micro 8-Pin MSOP
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Absolute Maximum Ratings (Note
Military/Aerospace specified devices required, please contact National Semiconductor Sales Office/ Distributors availability specifications. Tolerance differential Output Short Circuit Duration Supply Voltage Voltage Input/Output pins Current Input Current Output (Notes Current Power Supply pins (Note 200V (Note +/-Supply Voltage (Notes +0.8V, -0.8V +/-10mA +/-80mA +/-80mA
Storage Temperature Range Junction Temperature(Note Soldering Information Infrared Convection sec.) Wave Soldering sec.)
-65°C +150°C +150°C 235°C 260°C
Operating Ratings
(Note
Supply Voltage 2.7V Junction Temperature Range (Note -40°C +85°C Package Thermal Resistance (JA) (Note micro 220°C/W MSOP pkg. Surface Mount 230°C/W
2.7V Electrical Characteristics
Unless otherwise specified, limits guaranteed 25°C, 2.7V, V+/2 V+/2. Boldface limits apply temperature extremes. Symbol TCVOS CMRR Parameter Input Offset Voltage Input Offset Voltage Average Drift Input Bias Current Input Offset Current Input Common Mode Resistance Input Common Mode Capacitance Common Mode Rejection Ratio 2.7V 2.7V 2.7V CMRR 50dB (Note Conditions (Note Limit (Note Units µV/°C -0.1
0.70
PSRR CMVR
Power Supply Rejection Ratio Input Common-Mode Voltage Range
CMRR 50dB
-0.2
AVOL
Large Signal Voltage Gain
Sourcing V+/2 1.35V 2.45V Sinking V+/2 1.35V 0.25V Sourcing V+/2 1.35V 2.65V Sinking V+/2 1.35V 0.05V
3162
1000 1778 1000 1778 1000
3162
4000
4000
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2.7V Electrical Characteristics
Symbol Parameter Output Swing High
(Continued)
Unless otherwise specified, limits guaranteed 25°C, 2.7V, V+/2 V+/2. Boldface limits apply temperature extremes. Conditions V+/2 100mV V+/2 100mV V+/2 -100mV V+/2 -100mV Sourcing V+/2 100mV (Note Sinking V+/2 -100mV (Note Supply Current load, normal operation Shutdown mode Toff Shutdown Turn-on time Shutdown Turn-off time Input Current Slew Rate (Note Unity Gain-Bandwidth Gain Bandwidth Product Input-Referred Voltage Noise V+/2 1VPP 10mV, V+/2 100KHz 10KHz, 10KHz 1KHz, 2.2Vpp, V+/2 (Note (Note (Note 2.67 2.69 0.70 0.001 Limit (Note 2.64 2.62 2.68 2.67 Units V/µs
Output Swing
Output Short Circuit Current
Input-Referred Current Noise
Total Harmonic Distortion
0.18
+/-5V Electrical Characteristics
Unless otherwise specified, limits guaranteed 25°C, -5V, gnd. Boldface limits apply temperature extremes. Symbol TCVos CMRR Parameter Input Offset Voltage Input Offset Voltage Average Drift Input Bias Current Input Offset Current Input Common Mode Resistance Input Common Mode Capacitance Common-Mode Rejection Ratio (Note Conditions (Note Limit (Note Units µV/°C
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+/-5V Electrical Characteristics
Symbol PSRR CMVR Parameter Power Supply Rejection Ratio Input Common-Mode Voltage Range
(Continued)
Unless otherwise specified, limits guaranteed 25°C, -5V, gnd. Boldface limits apply temperature extremes. Conditions CMRR (Note -5.3 AVOL Large Signal Voltage Gain Sourcing Sinking Sourcing 4.6V Sinking -4.6V 100mV 100mV -100mV -100mV Sourcing, 100mV (Note 3),(Note Sinking, -100mV (Note 3),(Note load, normal operation Shutdown mode Toff Shutdown Turn-on time Shutdown Turn-off time Input Current Slew Rate (Note Unity Gain-Bandwidth Gain Bandwidth Product Input-Referred Voltage Noise +10, 10k, 10Vpp, 1000pF 10mV 10KHz 10KHz, 10KHz 10KHz, 8Vpp, (Note (Note Limit (Note -5.2 -5.0 17.8 17.8 3.16 31.6 17.8 31.6 4.60 4.54 4.85 4.83 -4.75 -4.65 4.90 -4.84 Units
34.5
V/mV
34.5
V/mV
4.73 4.90 -4.85 -4.95 0.001
Output Swing High
V/µs
Output Swing
Output Short Circuit Current
Supply Current
Input-Referred Current Noise
Total Harmonic Distortion
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+/-5V Electrical Characteristics
Note Human body model, 1.5k series with 100pF.
(Continued)
Note Absolute Maximum Ratings indicate limits beyond which damage device occur. Operating Ratings indicate conditions which device intended functional, specific performance guaranteed. guaranteed specifications test conditions, Electrical Characteristics. Note Applies both single-supply split-supply operation. Continuous short circuit operation elevated ambient temperature result exceeding maximum allowed junction temperature 150°C. Output currents excess 40mA over long term adversely affect reliability. Note maximum power dissipation function TJ(max), maximum allowable power dissipation ambient temperature (TJ(max) TA)/JA. numbers apply packages soldered directly onto board. Note Typical Values represent most likely parametric norm. Note limits guaranteed testing statistical analysis. Note Positive current corresponds current flowing into device. Note Slew rate slower rising falling slew rates. Note Shutdown Turn-on Turn-off times defined time required output reach 10%, respectively, final peak peak swing when Rail Rail output swing with 100KHz sine wave, load, +10. Note Limiting input current only necessary input voltages that exceed absolute maximum input voltage ratings. Note Short circuit test momentary test. Note Note Output short circuit duration infinite Otherwise, extended period output short circuit damage device. Note machine Model, series with 200pF.
Application Notes
Shutdown features: LMC8101 capable being turned order conserve power. Once shutdown, device supply current drastically reduced (1µA maximum) output will Tri-stated. shutdown feature LMC8101 designed flexibility. threshold level input referenced either setting level input. When input connected threshold level referenced vice versa. This threshold will about 1.5V from supply tied pin. this example, device will shutdown long voltage within order ensure that device would chatter between active shutdown states, hysteresis built into transition (see Figure illustration this feature). shutdown threshold hysteresis level independent supply voltage. Figure illustration applies equally well case when tied horizontal axis referenced instead. should within voltage range from 1.1V 1.9V selected supply voltage since this transition region device status will undetermined.
Table below, summarizes status device when pins connected directly
TABLE LMC8101 Status Summary LMC8101 Status Shutdown Active Shutdown Active
case shutdown operation needed, seen Table pins simply connected opposite supply nodes achieve Active operation. should always tied node; left unconnected, these high impedance inputs will float undetermined state device status will undetermined well. With device shutdown, once Active operation initiated, there will finite amount time required before device output settled final value. This time less than 15µs. addition, there some output spike during this time while device transitioning into fully operational state. Some applications sensitive this output spike proper precautions should taken order ensure proper operation times. Tiny Package: LMC8101 available micro package well MSOP package. micro package requires approximately board area SOT23. This package less than height allowing placed absolute minimum height clearance areas such cellular handsets, panels, PCMCIA cards, etc. More information about micro package found http://
DS101240-82
FIGURE Supply Current 'SD' Voltage
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Application Notes
Conversion Boards:
(Continued)
load drive capability increased from 8200pF 16000pF output load increased from +10, overshoot limit, supply). Isolation resistor between output load: This resistor will isolate feedback path (where excessive phase shift output capacitance cause instability) from capacitive load. With supply, isolation resistor allows unlimited capacitive load without oscillation compared only 300pF without this resistor +1). Higher supply voltage: Operating LMC8101 higher supply voltages allows higher load tolerance. 10V, LMC8101's supply voltage load limit 300pF improves about 600pF +1). Closed loop gain increase: with Amps, capacitive load tolerance LMC8101 increases with increasing closed loop gain. applications where load mostly capacitive resistive loading light, stability increases when LMC8101 operated closed loop gain larger than
order ease evaluation tiny packages such micro SMD, there conversion board (LMC8101CONV) available board designers. This board converts micro device into package (see Figure Conversion Board diagram) easier handling evaluation. This board ordered from National Semiconductor contacting http://www.national.com
DS101240-89
FIGURE micro Conversion Board pin-out Increased Output Current: Compared LMC7101, LMC8101 improved output stage capable three times larger output sourcing sinking current. This improvement would allow larger output voltage swing range compared LMC7101 when connected relatively heavy loads. lower supply voltages this added benefit since increases output swing range. example, LMC8101 typically swing 2.5Vpp with sourcing sinking output current 2.7V) whereas LMC7101 output swing would limited 1.9Vpp under same conditions. Also, compared LMC7101 SOT23 package, LMC8101 dissipate more power because both MSOP micro packages have better heat dissipation capability. Lower noise: dominant input referred noise term LMC8101 input noise voltage. Input noise current this device practical significance unless equivalent resistance looks into higher. LMC8101's frequency noise significantly lower than that LMC7101. example, 10Hz, input referred spot noise voltage density compared about 200nV LMC7101. Over frequency range 0.1Hz 100Hz, total noise LMC8101 will approximately less than that LMC7101. Lower THD: When connected heavier loads, LMC8101 lower compared LMC7101. example, with supply 10KHz 2Vpp swing -2), LMC8101 (0.2%) less than LMC7101's. LMC8101 kept below 0.1% with 3Vpp output 10KHz (refer Typical Characteristics Plots). Improving load drive capability: This accomplished several ways: Output resistive loading increase: Phase Margin increases with increasing load (refer Typical Characteristics Plots). When driving capacitive loads, stability generally improved allowing some output current flow through load. example,
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Typical Performance Characteristics
specified Gain/Phase Frequency 1.35V
2.7V, Single Supply, V+/2, 25°C unless
Gain/Phase Frequency
Gain/Phase Frequency open
DS101240-2
DS101240-1
DS101240-4
Gain Phase various 1.35V
Unity Gain Frequency Supply Voltage
Phase Margin Supply Voltage
DS101240-3
DS101240-5
DS101240-6
Unity Gain Frequency Phase Margin Load
Unity Gain Frequency Phase Margin Load
PSRR Frequency
DS101240-7
DS101240-8
DS101240-10
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Typical Performance Characteristics
specified (Continued) PSRR Frequency
2.7V, Single Supply, V+/2, 25°C unless
CMRR Frequency
Input Bias Current Common Mode Voltage 85°C
DS101240-9
DS101240-11
DS101240-13
Input Current Temperature
Vout
Vout
DS101240-23 DS101240-91
DS101240-83
Vout
Vout
Supply Current Supply Voltage
DS101240-28
DS101240-24 DS101240-29
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Typical Performance Characteristics
specified (Continued) Delta (Ref 1.35V)
2.7V, Single Supply, V+/2, 25°C unless
Delta (Ref
Offset Voltage Vsupply
DS101240-92
DS101240-93
DS101240-37
Output Positive Swing Supply Voltage, V+/2
Output Positive Swing Supply Voltage V+/2
Output Negative Swing Supply Voltage, V+/2
DS101240-25
DS101240-27
DS101240-35
Output Negative Swing Supply Voltage, V+/2
Short Circuit Sinking Current Supply Voltage
Short Circuit Sourcing Current Supply Voltage
DS101240-36
DS101240-26
DS101240-30
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Typical Performance Characteristics
specified (Continued) Undistorted Output Voltage Swing vs.Output Load Resistance
2.7V, Single Supply, V+/2, 25°C unless
Step Response settling time overshoot vs.Cap Load
Large Signal Step Response
DS101240-15
DS101240-46
DS101240-14
Small Signal Step Response
Large Signal Step Response
Small Signal Step Response
DS101240-16
DS101240-17
DS101240-18
Small Signal Step Response
Large Signal Step Response
Large Signal Step Response
DS101240-19
DS101240-20
DS101240-21
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Typical Performance Characteristics
specified (Continued) Small Signal Step Response
2.7V, Single Supply, V+/2, 25°C unless
Slew Rate Supply Voltage
Slew Rate Capacitive Load
DS101240-22 DS101240-38 DS101240-39
Slew Rate Capacitive Load
Slew Rate Capacitive Load
Slew Rate Capacitive Load
DS101240-41
DS101240-42
DS101240-43
Voltage Noise Frequency
Voltage Noise Various Frequencies
THD+N Amplitude
DS101240-40
DS101240-12 DS101240-44
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Typical Performance Characteristics
specified (Continued) THD+N Frequency
2.7V, Single Supply, V+/2, 25°C unless
Sourcing Current Output Voltage 2.7V)
Sinking Current Output Voltage 2.7V)
DS101240-45
DS101240-87
DS101240-85
Sourcing Current Output Voltage 10V)
Sinking Current Output Voltage 10V)
Load Iout
DS101240-86
DS101240-84
DS101240-88
Load Isolation Resistance
DS101240-90
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Physical Dimensions
inches (millimeters) unless otherwise noted
NOTES: UNLESS OTHERWISE SPECIFIED EPOXY COATING 63Sn/37Pb EUTECTIC BUMP RECOMMENDED NON-SOLDER MASK DEFINED LANDING PAD. ESTABLISHED LOWER LEFT CORNER WITH RESPECT TEXT ORIENTATION. REMAINING PINS NUMBERED COUNTERCLOCKWISE. DRAWING NUMBER REPRESENTS PACKAGE SIZE VARIATION WHERE PACKAGE WIDTH, PACKAGE LENGTH PACKAGE HEIGHT. REFERENCE JEDEC REGISTRATION MO-211, VARIATION micro Package Order Package Number LMC8101BP LMC8101BPX Package Number BPA08EFB 1.387 1.4127 0.850
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LMC8101 Rail-to-Rail Input Output, 2.7V micro package with Shutdown
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
8-Pin MSOP Package Order Package Number LMC8101MM LMC8101MMX Package Number MUA08A
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National does assume responsibility circuitry described, circuit patent licenses implied National reserves right time without notice change said circuitry specifications.
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