基于ZYNQ-7000与ADS125H02的高精度模数转换设计  

Design of high precision ADC based on ZYNQ-7000 and ADS125H02

作　　者：邓肖丹 李学砚 段乐颖 李行素 DENG Xiaodan;LI Xueyan;DUAN Leying;LI Xingsu(Key Laboratory of Airborne Geophysics and Remote Sensing Geology,MNR,Beijing 100083,China;China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China)

机构地区：[1]自然资源部航空地球物理与遥感地质重点实验室,北京100083 [2]中国自然资源航空物探遥感中心,北京100083

出　　处：《电子设计工程》2023年第22期73-77,共5页Electronic Design Engineering

基　　金：国家重点研发计划专项课题(2021YFB3900205);中国自然资源航空物探遥感中心青年创新基金(2020YFL01)。

摘　　要：在数据采集与实时控制等系统中,对模数转换(ADC)的同步性、准确度与精度要求越来越高。基于目前对微控制器低功耗、小型化以及高速处理速度的应用需求,设计采用XILINX公司的ZYNQ-7000系列微控制器,在PL端利用SPI串行接口与模数转换芯片ADS125H02进行通信,编写嵌入式代码,进行仿真测试,并通过串口将双通道电压幅值实时同步发送至上位机,实现24位、±5 V的低噪声、高精度的双极性双通道模拟数据的采集转换。结果测试表明,基于ZYNQ-7000与ADS125H02的模数转换具有同步性好、精度高、移植性强、适用面广等优点。The synchronization,accuracy and precision of ADC are increasingly required in data acquisition and real-time control systems.Base on the current application requirements for low power consumption,miniaturization and high processing speed of micro controllers,use SPI serial interface to communicate with ADC chip ADS125H02 at PL ports based on XILINX ZYNQ-7000 series micro controller.Write embedded code,conduct simulation test,and send the dual-channel voltage amplitude synchronously in real time to the upper computer through serial port to realize the acquisition and conversion of 24 bit,±5 V low-noise,high-precision dual-channel analog data.The results show that the ADC based on ZYNQ-7000 and ADS125H02 has the advantages of good synchronization,high precision,strong portability and wide application.

关 键 词：ZYNQ-7000 FPGA ADS125H02 模数转换 

分 类 号：TN792[电子电信—电路与系统]