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本文介绍一种单片12位A/D转换器CH7109.它采用双积分方法进行数据转换,以CMOS工艺制造的.器件共有14个三态输出端,可与TTL电路相容,其中包括12个二进制数据输出端(B_1～B_(12)),一个极性判别端(POL)和一个过量程判别端(OR),分为低位字节(第1位到第8位)和高位字节(第9位到第12位以及极性判别位和过量程判别位)而受到控制.CH7109可以很方便地与微处理机对接,它还包含了微处理机接口所需要的所有有源电路.其外引线排列
This article describes a single 12-bit A / D converter CH7109. It uses double integration method for data conversion, CMOS technology to manufacture the device has a total of 14 three-state output, TTL compatible circuit, including 12 Binary data output (B_1 ~ B_ (12)), a polarity discrimination end (POL) and an overrange discrimination end (OR) are divided into low byte (1st to 8th) and high byte 9th to 12th, and polarity discrimination and overrange discrimination.) CH7109 can easily interface with the microprocessor, it also contains all the necessary microprocessor interface circuit, which External lead arrangement