This paper introduces a high-resolution dual-channel A/D converter AD7711, which can meet the requirements of dual-channel A/D sampling. The content includes the characteristics of AD7711, internal register structure and external interface, and elaborates on the interface technology between AD7711 and single-chip microcomputer AT89S8252 in the data acquisition system, including hardware interface circuit and software program design and precautions. Keywords A/D converter AD7711 single-chip microcomputer AT89S8252 multiplexer switch ADG609 AD7711 is a high-resolution dual-channel analog-to-digital converter device launched by AD Company in the United States. It uses sigma-delta technology to achieve 24-bit non-missing code operation. It has the advantages of strong anti-interference ability and little influence by noise environment, making it an ideal choice for industrial and process control applications.
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