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AFE4490血氧采集模块

Other Parts Discussed in Thread: AFE4490

你好,我用AFE4490模拟前端做了个反射式血氧实验模块。驱动正常,AFE4490的初始化按官方例程进行配置寄存器,INN INP连接光敏接收管,TXP TXN连接两个血氧监测的发光二极管,小灯的脉冲用示波器观测不为方波,但是频率正确;采集血氧信号发现采集的数据都是杂波 不明白原因。是因为传感器选型问题,还是反射式方案不好使