I'd like to measure 0-800VDC using the ADC of a PIC18F and opto-isolated from the high voltage. Since optocoupler's CTR is variable and non-linear, I'll use the IL300. Checking this application note, I've found the following schematic:
That's the schematic I've made:
From that, I'd like to understand what parameters I have to check to choose the right op amps for this application. Any general purpose rail-to-rail 12V single supply would fit the project? Also, is IL300 the best option for this?