Integrated Device Technology Automotive Sensor Signal Conditioner for Dual Voltage Source Sensor Inputs (e.g. Thermocouples) with SENT or I2C Output ZSSC4175BE2W

The ZSSC4175 is a member of IDT 's ZSSC417x family of CMOS integrated circuits for highly accurate amplification and sensor-specific correction of voltage source sensor signals; e.g., thermocouple signals. The ZSSC4171 offers dual inputs for thermocouple signals. Digital compensation of offset, sensitivity, temperature drift, and nonlinearity is accomplished with a 16-bit RISC microcontroller. Calibration coefficients and configuration data are stored in an integrated non-volatile memory ( NVM ), which is reliable in automotive applications. Measured values can be read via a digital SENT or I2C interface. The SENT interface enables transmission of sensor data via its fast channel as well as supplementary data via its Serial Data Message ("slow") channel using only one output pin. End-of-line calibration is supported via an I2C interface or via a One-Wire Interface ( OWI ) through the data output pin ( DOUT ). The ZSSC4175 and the calibration equipment communicate digitally, so the noise sensitivity is greatly reduced. Digital calibration helps keep assembly cost low as no trimming by external devices or lasers is needed. The ZSSC4175 is optimized for automotive environments by overvoltage and reverse polarity protection circuitry, excellent electromagnetic compatibility, and multiple diagnostic features.