Hello,
we have an application where we're using Infineon's IM69D130 PDM mics connected to MICFIL peripheral on a iMX8M MINI.
Those mics have 130dBSPL of AOP and we're having some issues with the MICFIL filtering, since we notice a heavy DC on the PCM converted signal and a mismatch on the SNR:
On the PCB, PDM data and clock look clean and accurate, but the converted PCM data is not good. The DC remover component have no effect and quality selector is set to Vlow0.
Thanks,
Aldo Ricci
