详细介绍了MAXIM 公司生产的串行A/D 转换器MAX1270，给出了其与单片机 AT89S52 的接口电路以及汇编语言A/D 转换程序。将其应用于毛细管电泳电导检测系统的数据采集，转换速度和转换精度完全满足要求。 关键词：MAX1270；A/D 转换；串行接口；汇编语言 Abstract：The A/D converter MAX1270 produced by MAXIM is firstly introduced in detail. The connection scheme of MAX1270 and AT89S52 is presented along with an assemble language based subroutine for A/D conversion. It has been successfully employed in a capillary electrophoresis system with conductivity detection for data acquisition. Satisfactory resolution and conversion rates are obtained. Keywords: MAX1270; A/D Conversion; Serial Port; Assemble Language
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