一、概述本文介绍一种用单板机(TP801)控制的简易模数转换器。它采用双积分工作原理,逻辑控制部分均由软件代替,转换精度为0.03％,分辨率为11位半,完成两个模拟量的转换时间为80ms,输入通道数可以根据需要更改,是一台可用于一般仪表调整和工业控制的简易A/D转换器。该转换器全部选用国产元件,总费用在500元以内,已 I. Overview This article describes a simple board with a single-chip (TP801) control of a simple analog-to-digital converter. It uses the principle of double integration, the logic control part is replaced by software, the conversion accuracy of 0.03%, resolution of 11 and a half to complete the two analog conversion time is 80ms, the number of input channels can be changed as needed, is a Simple A / D converter for general meter adjustment and industrial control. The converter made of all domestic components, the total cost of less than 500 yuan, has