PCM6020-Q1: Digital HPF and Biquad Filter feature

Tool/software:

Hi Jeff, thanks for your prompt reply. 

Regards to high pass filter requirements, we want to have 200Hz HPF with slope of -80dB/dec. 

With PCM6020, programmable first order filter (HPF_SEL) can achieve only -3dB cut off frequency with slope of -20dB/dec. 

For the additional HPF filtering, can we use digital biquad filter as second order filter to meet the 200Hz cutoff with -80dB/dec slope?. 

if you have any other better proposal pls share it.

Thanks