Hi!
The minimum reference is 3V, it is in table 31-30 on page 539 of document 
DS30009964C.pdf (PIC18F47J53 datasheet)
Greets,Kiste

    Am Samstag, 27. November 2021, 09:36:43 MEZ hat vsurducan 
<[email protected]> Folgendes geschrieben:  
 
 Hi all,I'm using a PIC18F25J53 for it's 12bit ADC feature.I did not find any 
info in the datasheet regarding the minimum value for the ADC external 
reference. Unfortunately it doesn't have a real voltage reference inside, just 
a reference used for ADC offset correction and a brute reference with a 
resistor divider ( used with the comparator). 
Any experience with this ADC microcontroller series?thx



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