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'[PIC]: A/D linearity'
2000\06\12@110110 by Edson Brusque

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Hello,

   have someone made some tests with the A/D on the PICS (I'm using
PIC16F873, 877) about it's linearity? It seens to me that the A/D output
doesn't make a perfectly line like:

       0V =    0    2.5V = 512    5V = 1023

   It seens more like:

       0V =    0    2.5V = 500    5V = 1023

   But I haven't made extensive tests about it.

   Is the A/D really precise? Can I use it as a voltmeter on a precision
application?

   Thanks,

   Brusque

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