I have an ADAU1701 on a mini-eval board. When I tell it to generate a sine wave, or read in a sine wave and put it straight back out via one of the DACs, the output is very noisy.
Does anybody know why this might be? I'm generating a 1kHz signal and when I use an externally generated signal its 1kHz and about 1 Vpp.
I had expected that an audio chip would have no problem working with a sine wave.