基于PCI总线的高精度数据采集卡的研制

A Design of High Accuracy Data Acquisition Board Based on PCI Bus

在某些特定场合，如地震监测、生物微弱信号检测中，对数据采集要求高精度。作者介绍了一种基于PCI总线的多通道高精度数据采集卡的设计方法，包括数据采集和PCI总线接口两部分的设计。数据采集卡使用16位高精度转换芯片AD7676，数字电路部分采用ALTERA公司的FPGA芯片EP2C8Q208，而PCI总线接口器件采用了PCI9030专用接口芯片。

In some special field, such as earthquake measuring, biologic faint signal measuring and so on, it is important to improve precision in data acquisition. In this paper, a design for high accuracy data acquisition based on PCI bus is presented, with the data acquisition and the interface for PCI bus included. AD7676 with 16-bit precision is used for high accuracy data acquisition board. Digital systems design mainly uses ALTERA＇s FPGA chip EP2C8Q208, while PCI9030 is used as PCI bus interface chip.