基于 ADS8332 的生理信号采集系统电路设计 *

摘要： 本文介绍了医学生理信号的的特点， 根据其特点设计出了针对医学生理信号进行采集的电路。该电路设计实现了基于 16 位的高精度 A/D 转换芯片 ADS8332 的医学生理信号采集系统，以基于 Cortex-M3 内核的 32 位微控制器 STM32F103RD 作为采 集控制芯片， 该系统电路可以实现对最多 16 个通道的模拟医学生理信号进行采集。此电路设计充分利用了 ADS8332 的高精度、 低功耗、 高采样速率的特点以及片上集成功能， 并配合了信号调理电路和相应的抗干扰措施，因此保证了医学生理信号的采集精 度和系统的稳定性。

Circuit Design of Physiological Signal Acquisition System Based on ADS8332*

ABSTRACT:In this paper, we introduces the characteristics of medical physiological signal, according to their characteristics, we design acquisition circuit for medical physiological signal. This physiological signal acquisition system circuit was designed and implemented based on the 16-bit high-precision serial A/D conversion chip ADS8332, and used 32-bit Cortex-M3 core-based microcontroller STM32F103RD as the acquisition control chip. This system circuit could achieve up to 16-channels of analog physiological signals acquisition capabilities. This circuit is designed to fully utilize the ADS8332 high-precision, low-power, high sampling rate characteristics as well as on-chip integration features, witha signal conditioning circuit and the corresponding anti-jamming measures to ensure the accuracy of medical physiological signal acquisition and system stability.