Hi Lisa,
Thanks for reminding me I wasn't able to notice my post.
Dave,
Thanks for the inputs! I have tried to increase the input level up to 250mVrs to no avail. This is the evaluation board for adau1761.The input level to this setup from the screenshots above is around 100mVrs through 3.3 AVDD as connected with the VDD from J17 of the eval board (S1 is 3.3VDD).
Regards,
Dan