Hey @Peter Jakacki
rather than hijacking @idbruce
's thread, perhaps a new topic would be better.
Set up a DAC example from AN001. Looked noisy as 7734. Raw square wave looked really horrid. Overshoot and ringing, total mess. PPDB. Significant cleanup by moding PPDB with 100uF on both sides of the chip with 0.1uF across the 100uf. Much improved output, still some ringing. DAC output looks better as well. currently using 100uF and 4.7K with a nicely controlled value 80% gives me 3V. there is still some noise on the output ~200mv @800khz. Does this seem reasonable for just quick RC DAC on the prop?