Other Parts Discussed in Thread: AFE4500EVM, AFE4500
Tool/software:
When I collect PPG signal using AFE4500EVM, I can see a noise component at 40Hz in frequency domain.
In particular, when I got a signal using the combination of IR-cut PD and IR LED - I know this is not recommended combination, this 40Hz noise compoent was easily visible.
Nothing was on the sensor at this time. the sensor was facing the ceiling without any obstacles.
At fitst, I thought this noise comes from wall power, so I used the battery to supply DC6.32 volts to boost pwer of AFE4500.
But I could still see the 40Hz noise component.
Have you seen this noise? Do you know where thise noise comes from?
