Other Parts Discussed in Thread: AFE4490
Hi all,
I am working on a project that utilizes AFE4490 as Analog front-end. The first prototype is working perfectly except one problem that we are facing some drift on PPG waveform. Then I try to use AFE4490 EVM along with AFE44x0SPO2EVM GUI 2.0 to confirm and I see the same drift:
As you can see, LED1 and LED2 signals are drifting like they are modulated with some sine wave of 0.1~0.2Hz. Although I tried in the dark room, without movement while capturing, the same drift appeared.
Have anyone seen this before? could you please advice how to eliminate it.
Thank you very much.
