This is maybe what I would do.
![]()
I would look to see if I could increase the series resistor enough to not need the PTC without the ADC input leakage current creating a significant error. Don't have time to look at the data sheet right now.
I would look to see if I could increase the series resistor enough to not need the PTC without the ADC input leakage current creating a significant error. Don't have time to look at the data sheet right now.