My senior design project is having trouble with our ADAU1701 Eval board. According to the specs, the ADCs should be able to run at 48kHz and beyond, however we are seeing very poor square wave performance at less than 10kHz. This leads us to believe that our board is not set up properly in terms of sample rate or perhaps there is a filter we are not seeing. We are by no means experts on the DSP, but we have not been able to find an answer to this issue by searching the forums.
In short, what settings would we need right out of the box to guarantee the highest sample rate for the ADC? We have not changed very many things in SigmaStudio.