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在生产过程控制和数据采集系统中,都必须把生产过程的被测量,利用检测元件转换成各种电的模拟信号,再通过模拟量输入通道变成数字量信息送给微型计算机进行数据处理。一般的微型机系统和单板机都不带有 A/D 和 D/A 转换装置。目前国内外已经生产了大量的各种类型的大规模集成电路的A/D 和 D/A 转换器以及过程控制通道,它们具有价格低、体积小、可靠性高,使用方便和转换速度快等特点。
In the production process control and data acquisition system, must be measured during the production process, the use of detection components into a variety of electrical analog signals, and then through the analog input channels into digital information to the microcomputer for data processing. A / D and D / A conversion devices are not included in typical microcomputer systems and single-board machines. At present, a large number of A / D and D / A converters and process control channels of various types of large scale integrated circuits have been produced at home and abroad, which have the advantages of low price, small size, high reliability, convenient use and fast conversion speed Features.