能直接输入小信号的高性能、低成本A/D转换线路

A Low Cost A/D Converter Accepts Low Level Signal Directly

本文介绍的A/D转换线路具有转换精度高、性能稳定可靠、抗干扰能力强、成本低等优点,并能直接接受10mV的小信号及热电偶、热电阻信号。文中较详细地阐述了该线路的工作原理、逻辑方块图和实现A/D转换的软件流程。

The A/D converter introduced here features high converting accuracy, stability, reliability and anti-interference as well as low cost. It accepts directly low level signal of 10mV and the signal from RTD and thermocouples. The operational prinicple of the circuit, logic diagarm and soft-ware flow chart of A/D converting are described in detail.