摘要： 设计并实现了一种基于FPGA的四通道数据采集系统。系统由65 MS/s的模数转换器AD9219实现对信号的高速采样。为满足采集数据实时存储的要求，设计了高速、大容量的DDR2硬件电路和接口逻辑。采集数据可通过USB接口上传至上位机，上位机负责数据的保存、处理和显示，同时控制数模转换器以直接数字合成的方式输出波形。测试结果表明，系统运行稳定可靠，可灵活控制。该系统为高性能数据采集提供了一套包括软硬件的整体解决方案，可以满足低温等离子诊断的要求。

中图分类号： TP216
文献标识码： A
DOI： 10.19358/j.issn.2096-5133.2020.09.002
引用格式： 简志景，梁昊. 一种基于FPGA的多通道数据采集系统设计[J].信息技术与网络安全，2020，39(9)：6-11.

Design of multi-channel data acquisition system based on FPGA

Abstract： A four-channel data acquisition system based on FPGA is designed and implemented. The system uses 65 MS/s Analog-to-Digital Convert(ADC) AD9219 to realize high speed sampling. In order to meet the requirements of real-time storage of collected data, a high-speed and high-capacity DDR2 hardware circuit and interface logic are designed. ADC data can be uploaded to the host computer through the USB interface. The host computer is responsible for the data storage, processing and visualizing. It can also control the Digital-to-Analog Convert(DAC) to output waveforms in the way of direct digital synthesis. The test results show that the system is stable, reliable and can be controlled flexibly. The system, including software and hardware, provides an overall solution for high-performance data acquisition, which can meet the requirements of low-temperature plasma diagnosis.

Key words : FPGA；multi-channel data acquisition；ADC；DDR2 SDRAM