we are evaluating the use of adcmxl3021 and faced some issues with MTC (Manual Time Capture) with velocity calculation enabled.
No FIR filter is applied and AVG_CNT=4 is used.
The sensor is not moving, standing on the table, but its calculated velocity is drifting, as you can see below (the 5 "fins" correspond to 5 different acquisitions (4096 samples each).
Performing the same acquisition with acceleration instead of velocity, the signal on the same axis is floating around 0 as expected:
Why is it behaving like this? Is there some error in our setup?
I've been trying to replicate the same measurement using the ADCMXL Evaluation Software but it seems to me that only acceleration time captures are possibile, not velocity ones. Can you please confirm this?
Sorry for the bad quality pics. I hope my point is clear, if not please do ask more details.
Thanks in advance