TPIC83000-Q1

TPIC83000-Q1 www.ti.com SLDS171 – NOVEMBER 2009 PRESSURE SENSOR SIGNAL CONDITIONING INTERFACE Check for Samples: TPIC83000-Q1 FEATURES 1 Qualified for Automotive Applications 10-Bit Pressure and Temperature Output On-Board Temperature Sensor Programmable Gain / Gain TC1 Programmable Offset / Offset TC1 / TC2 On-Board EEPROM for System Calibration Operating Temperature Range: –40°C to 85°C 16-Pin TSSOP (PW) Package UART Interface APPLICATIONS Occupancy Weight Sensing Pedal-Pressure Sensing General Low-Pressure Sensing Vcc VccA Gnd REF1 GndA SIP Gnd SIN PW PACKAGE (TOP VIEW) 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 Vdd DGnd DI DO TST2 TST1 TST0 ProgV DESCRIPTION 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 temp...