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ＤＳ１８２０是Ｄａｌａｓ公司研制的一线式数字温度计，它以９ｂｉｔ的数字量来表示温度，它允许多个ＤＳ１８２０串在一根数据线上，可使连至微处理器的Ｉ／Ｏ数为最少。文中介绍了集成电路芯片ＤＳ１８２０功能特点及其工作方式，并给出应用实例。
The DS1820 is a one-wire digital thermometer developed by Dalas that provides a 9-bit digital representation of temperature. It allows multiple DS1820s to be wired in a single data line, minimizing the number of I / Os connected to the microprocessor. This article introduced the integrated circuit chip DS1820 function characteristic and its working method, and gives the application example.