I am testing the performance of the PCM2900C using the evaluation module. I am using Adobe Audition FFT to analyze the noise floor so I can compare it's performance with other solutions. I am noticing that there are several frequencies that have significant spikes. They are roughly 15 dB (worst case) or so above the noise floor in the regions of 100 Hz, 500 Hz, 4 kHz & 5 kHz.
Has anyone experienced this phenomenon and has anyone found a solution? if not for these "spikes" the PCM2900C would be perfect for my application.