Abstract: This paper introduces a system that includes two ADC0809 and one 51 SCM. This system adopts a method that connects ADC0809 with SCM only by circuits. Compared with the existing methods, it has a lot of advantages, such as simple circuit, low cost, easy programming, steady signal and so on. This method can realize the real-time data acquisition function of 16 channels and more channels. Experimental results show the system has a high collecting accuracy, and a wide acquisition frequency and a high gathering speed.

Key words: ADC0809, data gathering, quarter frequency

摘要： 介绍基于2片ADC0809与1片51单片机组成的一套16通道的数据采集系统。系统采用ADC0809与单片机之间电路相连接的方法，与现有方法相比，该方法具有电路简单、制作成本低、程序编写简易、信号稳定等优点，可以实现16通道及更多通道的实时数据采集。实验结果表明，该系统采集精度较高，采集频率范围广，采集速度较快。

关键词: ADC0809芯片, 数据采集, 四分频

CLC Number: 

• TP391