一种多通道自动扫描A/D转换模块的设计

摘要

A/D conversion board is used for expanding CompactPCI computer system' s data collection function. The module exchanges data with host through CompactPCI bus, and achieve simulated&digital conversion of 750ksps、16Bit through the AD7612 , and completed data collection function. In the designing used the CPLD FIFO and RAM to implement multi channels of the Automatically scan . Improved data collection of intelligent design module; Use the isolation device to separate A/D conversion of the data and control signals isolation , improved data collection precision . The module has been in product applications, and performs stable.%A/D转换模块用于扩展CompactPCI计算机系统的数据采集功能;该模块通过CompactPCI总线与主机通讯,通过AD7612实现750ksps、16Bit的模拟/数字转换,完成数据采集功能;在设计上采用CPLD、FIFO和RAM实现多通道的自动扫描,提高了模块数据采集的智能化设计；采用磁隔离器件实现A/D转换的数据和控制信号的隔离,提高了数据采集的精度;该模块已经在产品上应用,性能稳定.