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AFE4432: the baseline is not stable before turn on the light and turn off the light

Part Number: AFE4432


We made a test board with the chip AFE432, base on the principle ofAFE432EVM. Now there was a problem in the test. After collecting the strong light signal, when the light was turned off and restored, the signal level could not return to the beginning, but was higher than the beginning signal level.  We need your help to find the rootcause.

Software tool: Bio-Sensing_Installer_V6.0.0

AFE4432 test problem .docx