摘  要：针对AD7706芯片组成的A/D转换电路硬件、软件的设计方法进行阐述与论证。实践表明，基于AD7706高精度A /D转换电路组成的称重单片机测控系统，具有测量精度高、测量速度较快、性能稳定等特点。
关键词：AD7706；A/D转换电路；测控系统

Abstract: It analyzed the designing method of the A/D Circuit, which is composed of AD7706 chip in hardware and software. It is proved that this control system has the advantages of high precision, high speed and steady performance.
Key words: AD7706；A/D Circuit；testing and control system