Other Parts Discussed in Thread: AFE4490
Hello,
if the ADC of the AFE4490 module is bypassed and the signals are routed out to the pins RX_OUT_P and RX_OUT_N we see a 4 MHz frequency in the output signals on the oscilloscope.
The pulse oximetry module runs on a 4 MHz clock so the source of the frequency is clear.
Is this 4 MHz swing only visible on the oscilloscope or is it also present if the ADC is not bypassed?
At first crosstalk from the CLOCK_OUT pin was assumed, so a RC-filter was attached. However, the 4 MHz remained in the output signal.
Is there anything we can do about the 4 MHz?
Regards,
Max
