Hey all, I was on this forum searching for "PCM1754 noise" and everything pointed to layout issues, grounding and decoupling. Although I had this exact issue seen in some posts, my resolution was none of the above.
At teh start, the noise was ubiquitous and could be clearly be heard under the (very clear and high quality) audio input... and no hardware changes changed or mitigated this noise floor.
After hours of fooling around with layout and hardware, I simply did not see any influence changes...at all. After stepping back I found my fix was simply software settings and my input data rate from 16Khz to 48khz completely (100%) resolved by underlying (totally audible) inband (white) broadband "noise".
If anyone can explain this I'd be happy to learn. :)
b.t.w. Seems that in my travels I also learned that the PCM1745 is rather robust regarding layout...
stay Safe !
