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本文介绍由TC534、831单片机和MAX7219构成的四通道精密数据采集系统及其转换速率、分辨力等参数的调整，它可对4路-4．2V~＋4．2V输入电压进行数据采集、A/D转换和数字显示，并在微机的配合下完成数据处理与过程控制。该系统适配各种传感器和变送器，广泛用于精密测量及工业自动控制领域。
This article describes the four-channel precision data acquisition system consisting of TC534, 831 and MAX7219 and its conversion rate, resolution and other parameters of the adjustment, it can 4-4.2V ~ 4.2V input voltage for data acquisition, A / D conversion and digital display, and in cooperation with the computer to complete data processing and process control. The system is suitable for a variety of sensors and transmitters, widely used in precision measurement and industrial automation.