本文介紹的數據采集系統應用低功耗、14 位逐次逼近以及兼容于I2C 串行接口的模/數轉換器MAX1069，可方便的與微控制器及其外圍設備進行連接。通過自行設計的數據采集系統，本文主要介紹了MAX1069 芯片的功能、時序，并通過I2C 軟件模擬的方法，實現
了MAX1069 與MCS-51 系列單片機間的數據采集。
關鍵詞：模/數轉換器；MAX1069；I2C 總線；單片機；數據采集
Abstract：The paper is proposed a system of data acqusition in which, a low-power, 14-bit successive approximation analog-to-digital converter (ADC) of MAX1069 is applyed. And with an I2C-compatible 2-wire serial interface，so MAX1069 is convenient to link with MCU. According to the data acqusiting system designed, the performance and clock cycles of MAX1069 is mainly introduced in this paper. In order to implement data acqusiting between MAX1069 and MCU of MCS-51 family, it is necessary to use software to simulate the operation of I2C.
Keywords：ADC；MAX1069；I2C Bus；MCU；Data Acqusition