25-BIT NONIUS ENCODER WITH 3-CHANNEL SAMPLING 13-BIT SIN/D INTERPOLATI
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iC-MN
25-BIT NONIUS ENCODER WITH 3-CHANNEL SAMPLING 13-BIT SIN/D INTERPOLATION
Encoder device iC-MN 3-channel, simultaneous sampling sine-to-digital converter which interpolates sine/cosine sensor signals using high precision converter with selectable resolution bits. Each input separate sample-and-hold stage which halts track signal subsequent sequential digitization. Various 3-track Nonius scale computations (after Vernier) configured calculation high resolution angle positions; these computations permit angle resolutions bits. absolute angle position output serial BiSS Interface with clock rates Mbit/s. RS422 transceiver required this integrated chip.
3-Ch. simultaneous sampling sine-to-digital conversion 3-track Nonius scale computation (after Vernier) Reduced conversion times internal flash counter Synchronization multiturn sensors on-chip BiSS master Differential inputs, single-ended signal capable Selectable input resistance permits voltage current signals Signal conditioning offset, amplitude phase Short-circuit-proof RS422 drive Mbit/s BiSS data line data output formats selectable Short-circuit-proof sine/cosine output drivers Signal level controllers direct supply encoder LEDs bridges Configurable system monitoring alarm indication Position preset function Device setup from serial EEPROM BiSS Full reverse polarity protection including sub-system Immune against faulty output supply connections
Applications
Optical magnetic position sensors Singleturn multiturn absolute encoders Linear scales absolute position
48-pin package
44-pin MQFP package 13.2 13.2
Kuemmerling -55294 Bodenheim, Germany Tel. 92-30 92-19 http://www.ichaus.com
iC-MN 25-BIT NONIUS ENCODER WITH 3-CHANNEL SAMPLING 13-BIT SIN/D INTERPOLATION iC-MN
purpose input signal stabilization conditioned signals into level controllers featuring current source outputs (master channel). These ACOx source pins either power LEDs optical encoder magneto resistor bridges magnetic encoder. control thresholds reached this event released alarm messaging using BiSS Interface NERR output. Both major chip functions sensor errors also monitored enabled alarm indication. this manner typical sensor errors, such signal loss wire breakage, short circuiting, dirt aging, example, signaled alarms. device other digital encoder functions governing correction phase errors between tracks, example, zeroing default setting specific position offset data output. Using BiSS master also integrated chip position data from multiturn sensors, provided second iCMN, example, read synchronized.
25-BIT NONIUS ENCODER WITH 3-CHANNEL Analog Output SAMPLING 13-BIT SIN/D INTERPOLATION Output Amplitude
Output Short-Circuit Current Signal Level Controller Operating Modes Operating Ranges Source Saturation Voltage Control Alarm Thresholds Sub-System Power Switch Permissible Load Current Drop Voltage Other Operational Data Supply Voltage
pin-to-pin) typ.
Output Cutoff Frequency
constant current, sine square, master channel max. approx. range limit
typ.
Specifications
Operating Modes 3-Channel interpolation 3-track Vernier calculation Config. multiturn modes (e.g. gearbox 1:16, from data) Compatible Sensors Photodiode arrays, sensors, sensors Signal Conditioning Differential Input Signal Range mVpp Vpp, mVpp Input Current Range Input Resistance Permissible Input Frequency Input Gain Range Gain Ratio Calibration Range Gain Calibration Step Offset Calibration Range Offset Calibration Step Calibration Reference Phase Calibration Range Phase Calibration Step Sine-to-Digital Conversion Conversion Time Conversion Time Nonius Acceptable Nonius Scale Signal Angle Resolution Angle Accuracy Data Interface Interface Performance Differential RS422 Output Mbit/s BiSS, clock rate push-pull, >2.5 typ. with cyclic readouts initialisation) master signal periods turn (ie. 4096) bits signal period bits signal period Nonius calc. typ. 0.18° signal period (calibrated) typ. mode) typ. high impedance mode) 200x (sine cosine) 0.09 200, 400, 1200, 2400 based calibration ref. 0.25 VDC, V(ACOM) 10.4 degree (sine cosine) 0.02 degree
single typ. current draw with reversed polarity) MQFP44 (13.2 13.2mm), QFN48 (7x7 mm), bare BiSS interface from serial EEPROM
Temperature Range (extended range request) Package Device Configuration
Monitoring Alarms lack input signal (due wire breakage, short-circuit, loss magnet, etc), calculation error excessive input level phase, signal level controller range, thermal overload, power configuration error Other Operational Modes bias temperature sensor calibration mode, device test mode, digital calib. mode
Functions
Name VDD* GND* VDDA GNDA VACO* ACOx* PSINx, NSINx PCINx, NCINx PSOUT*, NSOUT* PCOUT*, NCSOUT* SLO*, NSLO* MA*, NMA* MTMA MTSLI PRES NERR* T0.T3 Function +4.5 Supply Voltage Ground Sub-System Positive Supply Output Sub-System Ground Output +4.5 Signal Level Controller Supply Signal Level Controller Output Pos./Neg. Sine Signal Input Pos./Neg. Cosine Signal Input Analog Pos./Neg. Sine Output Analog Pos./Neg. Cosine Output BiSS Interface, Pos./Neg. Data Output BiSS Interface, Pos./Neg. Clock Input BiSS Interface, Data Input BiSS Interface, Clock Repeater Output BiSS Master Interface, Clock Output BiSS Master Interface, Data Input Serial E2PROM Interface, Data Line Serial E2PROM Interface, Clock Line Sense Rotation Preselection Position Preset Trigger Input Alarm Message Output System Error Message Input Test Calibration Pins
Differential RS422 Receiver tolerant
(master), (nonius), (segment) Immune against faulty output supply connections
Kuemmerling -55294 Bodenheim, Germany Tel. 92-30 92-19 http://www.ichaus.com
Rev.
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