Design and Implementation of Dual-channel 100MSPS Data Acquisition Module

Abstract

Aiming at the problems of single channel acquisition mode of traditional oscilloscope recorder, insufficient acquisition flexibility, low acquisition frequency, transmission delay, etc., this paper proposes a design method of dual-channel signal acquisition module based on FPGA hardware platform. This design uses a high-sampling-rate ADC chip AD9268 as a dual-channel acquisition port to achieve 100MSPS sampling frequency acquisition, while simultaneously transmitting the converted digital signal through the SerDes serial port. In the FPGA implementation process, a channel conditioning module is added to adjust the gain and offset of the input data. The test results show that the system can realize synchronous sampling, processing, and transmission of the input analog signal, and the acquisition process is stable, and the collected signal has a high degree of restoration and no distortion.