PGA400-Q1 - Texas Instruments

PGA400-Q1 Pressure-Sensor Signal Conditioner

The PGA400-Q1 is an interface device for piezoresistive, strain gauge, and capacitive-sense elements. The device incorporates the analog front end (AFE) that directly connects to the sense element and has voltage regulators and an oscillator. The device also includes a sigma-delta analog-to-digital converter (ADC), 8051 WARP core microprocessor, and OTP memo.

Features

•1 Analog features
  – Analog front-end for resistive bridge sensors
  – Self-oscillating demodulator for capacitive sensors
  – On-chip temperature sensor
  – Programmable gain
  – 16-bit, 1-MHz sigma-delta analog-to-digital converter for signal channel
  – 10-bit sigma-delta analog-to-digital converter for temperature channel
  – Two 12-bit digital-to-analog outputs
• Digital features
  – Microcontroller core
  – 10-MHz 8051 WARP core
  – 2 clocks per instruction cycle
  – On-chip oscillator
  – Memory
  – 8KB of OTP memory
  – 89 bytes of EEPROM
  – 256 bytes data SRAM
• Peripheral features
  – Serial peripheral interface.