ZMD31035

The Analog Mixed Signal Company ZMD31035 Automotive Sensor Signal Conditioner PRELIMINARY Features Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity Adjustable to nearly all piezo-resistive bridge sensors types Digital one-shot calibration: quick and precise Selectable temperature compensation reference: internal or external diode Output options: analog voltage (0 to 5V) or one-wire-interface (LIN compatible protocol) Digital sensor calibration via one-wire-interface Sampling rate typically 125Hz High voltage protection Reverse polarity and short circuit protection Operation temperature –40 to +125°C Supply voltage 4.5 to 5.5V Application Circuit TEMP. SENSING DIODE BRIDGE SENSOR VDDB VTN VBN VSSB VBP AOUT VSSE ZMD31035 VSSA VSSA VDDA DI CLK VDD VDDE VSS 100n 100n 100n GND OUT OWI 15n VSUPPLY 4.5...5.5V Benefits No external trimming components required PC-controlled configuration and calibration via one-wire interface – simple, low cost High accuracy (±0.1% FSO @ -25 to 85°C; ±0.25% FSO @ -40 to 125°C) Brief Description The ZMD31035 is a CMOS integrated circuit for highlyaccurate amplification and sensor-specific correction of bridge sensor signals. Digital compensation of sensor offset, sensitivity, temperature drift and non-linearity is accomplished via a 16-bit RISC micro-controller running a correction algorithm with calibration coefficients stored in a non-volatile EEPROM. The ZMD31035 is adjust...