Quote Originally Posted by freddiecas View Post
If I'm allowed to jump in Firefly is making an important point that class D or switching supplies operate at high frequencies, and need adequate filtering on the output to get rid of the noise and spikes that occur. Oversampling DACs also work at high frequencies and need filtering to remove the hash from the analogue outs. If the two are in the same case (or even if not) the layout and screening needs to work down beyond the microvolt level to make sure the one does not intermodulate the other and cause errors in the digital signal or noise spikes in the analogue signal. They are after all both micro radio transmitters
Thanks, I think I'm starting to understand.

So are you saying that using a switching power supply along with the Murata regulators (which have a high switching frequency) is likely to cause issues as the switching frequencies might interfere with each other?