Automotive Capacitive Pressure Sensor Interface Reference Design
TIDA-00149
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Key Document

Description

This TIDA-00149 reference design utilizes a fully integrated SOC (System on a Chip) as an interface device for piezoresistive, strain gauge and capacitive sense elements. The device incorporates the analog front end that directly connects to the sense element and has voltage regulators and oscillator. The device also includes sigma-delta analog-to-digital converter, 2 DAC outputs, 8051 WARP core microprocessor and OTP memory. Sensor compensation algorithms can be implemented in software which enables a fully configurable system that can be modified to support multiple sensor elememts. This design incorporates the PGA400Q1EVM board to create the solution.

Features
  • Single +12 VDC power-supply input for basic operation where 12V bucks down to 5V for the PGA400
  • On-board resistive and capactive sensor simulators  
  • PC Control with a GUI and USB Communication Board 
  • One-Wire-Interface (OWI) Activation and Communication circuitry

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Schematic/Block Diagram

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Test Data

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Design Files

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Technical documentation

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User guide (2)
Title Type Size (KB) Date
PDF 576 02 May 2014
PDF 239 02 May 2014
Design files (4)
Title Type Size (KB) Date
ZIP 1253 02 May 2014
ZIP 1331 02 May 2014
PDF 164 02 May 2014
PDF 345 02 May 2014

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