A/D conversion problem in 18F2520, 2523, 2550 etc.

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  1. - 8th March 2008, 18:17 #5
    Darrel Taylor's Avatar
    Darrel Taylor
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    Also in the datasheet for a 2550/4550...

    The internal AD/RC oscillator is not a good idea on PIC chips if you want extreme accuracy.

    <img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2395&stc=1&d=120499947 4" />

    Try a different AD clock setting ...
    Code:
    ADCON2=%10100110  ; 64 TOSC, 8-TAD sample
    Also, since you're not using ADCIN, the ADC_ DEFINE's don't do anything.
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    Last edited by Darrel Taylor; - 8th March 2008 at 20:23. Reason: .
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