基于ADS1258的高精度信号采集电路设计

Design of high precision signal acquisition system based on ADS1258

该电路设计实现了基于24位高精度Δ-Σ型串行A/D转换芯片ADS1258的信号采集系统,以FLASH型FPGAA3P125为采集存储控制器,该电路可以实现45路模拟信号的采集存储功能。设计中充分利用ADS1258片上集成功能,配合信号调理电路、5 V基准源以及相应的抗干扰措施,既简化了电路设计,也保证了信号的采集精度和系统的稳定性。该采集存储单元适用于对精度要求较高的场合。

he circuit of the signal acquisition system was designed and implemented based on 24 high-precision △-∑ type serial A/D conversion chip ADS1258, and FLASH-based FPGA A3P125 for the acquisition and storage controller, the circuit could achieve 45-channel analog signal acquisition and storage capabilities. Taking full advantage of ADS1258 chip integration, with the signal conditioning circuitry, 5 V reference and the corresponding anti-jamming measures, not only the circuit design was simplified, but also the accuracy and signal acquisition system stability was ensured. The acquisition and storage unit was for the high precision applications.