My customer is using ADPD4101.
In the following situation, please advise on how to reduce the DC offset in the PPG signal.
- Measured AC level is about -20~+20 (ADC max = 65535)
- DC value is already ~ 44000, which is 2/3 of ADC max.
-> We cannot increase LED, because DC offset is high and ADC saturation.
- TIA gain 100k, ODR 25Hz, Pulse count = 8 (ADC MAX 65535)
- My customer wants to decrease the DC offset without increasing the pulse count.