[原创] TI PGA400－Q1汽车±500A精密电流检测参考设计TIDA－03040

TI公司的PGA400-Q1是用于压力传感器,应力表和电容检测元件的接口器件,集成了直接连接到检测元件的模拟前端(AFE)以及电压稳压器和振荡器,还包括有Sigma-Delta ADC,8051 WARP核微处理器和8KB OTP存储器,89B EEPROM和256B 数据SRAM.主要用在压力传感器信号调理,水平传感器信号调理和湿度传感器信号调理.本文介绍了PGA400-Q1主要特性,功能框图以及汽车±500A精密电流检测参考设计TIDA-03040主要特性,框图和系统指标,框图和电路图,材料清单.

The PGA400-Q1 device is an interface device forpiezoresistive, strain gauge, and capacitive-senseelements. The device incorporates the analog frontend (AFE) that directly connects to the sense elementand has voltage regulators and an oscillator. The device also includes a sigma-delta analog-to-digitalconverter (ADC), 8051 WARP core microprocessor,and OTP memory. Sensor compensation algorithmscan be implemented in software. The PGA400-Q1device also includes two digital-to-analog converter(DAC) outputs.

PGA400-Q1主要特性:

1• Analog Features
– Analog Front-End for Resistive Bridge Sensors
– Self-Oscillating Demodulator for CapacitiveSensors
– On-Chip Temperature Sensor
– Programmable Gain
– 16-Bit, 1-MHz Sigma-Delta Analog-to-DigitalConverter for Signal Channel
– 10-Bit Sigma-Delta Analog-to-Digital Converterfor Temperature Channel
– Two 12-Bit Digital-to-Analog Outputs..

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