TPIC83000-Q1,pdf(Pressure Sens

The TPIC83000 is a single-channel, signal conditioning device for pressure sensors used in low-pressure sensing applications such as passenger occupancy indication/detection and pedal pressure sensing. The pressure sensor can be based on either a strain gauge or piezo-resistive elements configured as a full Wheatstone bridge. This device provides an analog signal conditioning interface between the pressure sensor and a microcontroller. The analog front end (AFE) inside the device processes the sensed signals from the pressure sensor by amplifying the signal and cancelling offset. This processed signal is then converted into a 14-bit, digital word using a sigma-delta analog-to-digital converter (ADC). The device also has a built-in 12-bit ADC that is used to sense ambient temperature to compensate for the temperature coefficient of the sensor and related processing circuitry.