onsemi NCV7192 - Sensor Signal Conditioning

NCV7192 is a Signal Conditioning Interface with Analog or SENT output, capable of Automotive Safety Applications. The IC receives a differential signal from the external sensing element, conditions gain and offset with a configurable amplification stage, compensates for sensor nonlinearity and temperature dependency, and delivers the result as digital SENT or ratio-metric analog output signal.

A separate measurement channel linearizes and measures the resistance of an external NTC to capture a medium temperature and communicate it over the SENT interface. The integrated EEPROM is programmable over the output pin for storage of configuration settings and compensation coefficients, as well as free format customer payload data. The NCV7192 includes failure diagnostics and internal protections against shorts, overvoltage, and reverse voltage to support Safety Applications.

Key features

• Resistive bridge impedance: from 1kΩ to 25 kΩ
• Integrated DSP to compensate bridge and temperature non-linearity using polynomes
• Differential input range from 2 mVpk/Vbdr to 125 mVpk/Vbdr
• Calibration interface over OUTX Pin
• Low-noise amplification stage with programmable gain/offset
• Temperature measurement with bridge impedance or internal junction diode
• Medium temperature measurement with external NTC
• SENT output according to the standard SAE J2716 (April 2016)
• Analog output buffer driven by a 14-bit DAC with programmable clip levels
• AEC-Q100 Qualified and PPAP capable

Applications

• Pressure sensors with Piezo-resistive bridge
• Force/torque sensors with resistive strain-gauge
• Overload detection
• Weight and pressure metering