嵌入式微控制器片内A/D转换器的应用研究

Application research on A/D converter inside of embedded micro-controller

介绍了微控制器片内A/D转换器的结构特点，深入分析了模拟输入信号源内阻对采样过程的影响、模拟输入信号源的大小与极性是否符合A/D转换器对输入信号的要求以及工作电源变化对转换精度的影响等方面问题，并提出解决方法。

This paper analyzes the A/D converter structure character inside of micro-controller. It especially gives deep analysis on the problems of the following aspects: the effect of the analogue input signal source inner resistance to the sampling process, whether the analogue input signal source value and polarity fit the requirement of A/D converter and the effect of the variation of working power to the converting precision. Then the paper brings up the solution.