摘要： 介紹了一種基于放大器,、模數(shù)轉(zhuǎn)換(Analog to Digital Converter,，ADC)和現(xiàn)場可編程門陣列(Field Programmable Gate Array，F(xiàn)PGA)的多通道數(shù)據(jù)采集方案,，包括采集系統(tǒng)的主要構(gòu)成以及實(shí)現(xiàn)方法,，最后對系統(tǒng)性能進(jìn)行了測試。該電路模塊為子母板結(jié)構(gòu),，通過PCI Extensions for Instrumentation Express(PXIe)機(jī)箱背板總線實(shí)現(xiàn)數(shù)據(jù)的讀出能力,。該模塊可支持8個采集通道的同步采集，每通道采樣率可達(dá)500 MS/s,。測試結(jié)果表明,，在其帶寬內(nèi)有效位可接近11 bit(ADC采樣精度為14 bit)，能夠滿足高速高精度的數(shù)據(jù)采集需求,。
(1.State Key Laboratory of Particle Detection and Electronics,，University of Science and Technology of China， Hefei 230026,，China,； 2.Department of Modern Physics,，University of Science and Technology of China,，Hefei 230026，China)
Abstract： The paper introduced a multi-channel data acquisition scheme based on amplifiers, Analog to Digital Converter(ADC) and Field Programmable Gate Array(FPGA), including the main components and implementation methods of the acquisition system. Finally, the system performance was tested. The circuit module is a mezzanine card structure, and the data readout ability is realized through the PCI Extensions for Instrumentation Express(PXIe) chassis backplane bus. The module can support simultaneous acquisition of 8 acquisition channels, and the sampling rate per channel can reach 500 MS/s. The results show that the Effective Number of Bits(ENOB) can be close to 11 bit in its bandwidth(ADC sampling accuracy is 14 bit), which can meet high-speed and high-precision data collection needs.
Key words : data acquisition,；amplifier,；ADC；FPGA,；JESD204B
