針對51單片機系統中常用的A/D轉換器價格高、精度低的缺點，介紹TI公司的16 位的帶有I2C串行接口的A/D轉換器ads1110的工作原理，給出ads1110與AT89C51單片機系統的接口電路和軟件設計。實踐證明，ads1110具有高性價比和實用性。
Abstract:
According to the disadvantages of high expense and low accuracy of the general A/D converter used in MCS51 microchip system,the principle and working process of a high accuracy 16-bit A/D conversion ads1110 which has I2C bus and belongs to TI Company are proposed here as well as the interface of ads1110 to AT89C51 and software list.It is proved to be high performance index and practicability.
