Sensor interface and sensor calibration technique

摘要

An apparatus and method for calibrating a sensor signal conditioner coupled to a bridge sensor disclosed. The signal conditioner sensor preferably includes a CMOS integrated circuit, which enables relatively easy and precise calibration of resistive bridge sensors via an EEPROM without the use of a microprocessor. When mated to a resistive bridge sensor, the sensor interface can digitally calibrate offset and gain with the option to calibrate offset and gain coefficients and linearity over temperature. A second order compensation can be enabled for temperature coefficients of gain or offset or bridge linearity.