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ADC problem

 
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johny
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ADC problem
PostPosted: Thu Jun 24, 2004 8:41 pm     Reply with quote
Is there anything special with AN0 analog input on PIC16F873A?
I am using three analog inputs AN0, AN1 and AN3. AN1 and AN3 works fine but AN0 is very drifty. Also during RESET the input is drven up to 3.6V. Any suggestion would be very appreciated.

johny
Haplo



Joined: 06 Sep 2003
Posts: 659
Location: Sydney, Australia

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PostPosted: Thu Jun 24, 2004 9:11 pm     Reply with quote
What are the crystal speed, ADC clock settings and the impedance on the AN0 pin?
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