Other Parts Discussed in Thread: AFE4490
A. I am using AFE4404 board; 660 nm, 940 nm finger probe as that supplied with AFE4490EVM and a Tiva 123 starter kit with i2c communication with 4404.
The finger signal is collected through a ADC interrupt and analysed in TIVA.
Th Problem: The ppg signal has slow wave amplitude modulation and not just a DC drift.
What can be the reason and how to overcome.
B. Using the AFE4490EVM with the same probe collected the data through GUI to a laptop and plotted. this data is a stable wave with some dc drift but the ac is almost constant.
C. Due to the cost difference we preferred AFE4404 against AFE4490. So definitely want to rectify the problem and waiting for your expert team support.
