So I've used the DSPIC33 for one project. Never got the ADC working properly, the advertised samplerate is useless, as the chip cannot do any calculation on it fast enough. "Its for control systems, that take one sample quickly, and then processing it. It doesnt support continous sampling"
And btw, we have 6 UARTs, but nobody wrote code for UART3-6 so if you connected that one, good luck, you are on your own, here is a register map.
OK, moving on. PIC32MZ.Datasheet: 18MSPS ADC. Wow, that's awesome.
The errata was basically: "ADC doesn't work, at all"
I will not touch the analogue peripherals of a PIC again, that's for sure. Probably they have Errata for opamps.