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AFE4400: afe4400 interference

anish singh1
Prodigy 180 points
Part Number: AFE4400

Below is the plot of RED,IR led raw data taken from afe4400 at 100hz. I am not able to understand the increase in the amplitude of RED and IR led at regular intervals, as there is no interference source nearby.

afe4400_dump.log

  • 0
    TI__Genius 12575 points
    Hi Anish,

    This looks like noise pick-up from AC mains.
    Please make sure that you do not make an electrical contact with the board and no ambient light enters the system.
    One way to verify this is to have to have the board in dark room or a black box and repeat the experiment. You also can have a reflective surface to get the same level of the DC.

    Regards,
    Prabin