ADC sampling time

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  1. - 22nd March 2008, 14:07 #1
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    flotulopex
    flotulopex is offline Senior Member
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    Default ADC sampling time

    Hello,

    I was wondering why the time I measure(1) for one ADC sampling channel is that much greater than the one stated on the datasheet?

    The oscillo sais around 113µs.
    <img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2433&stc=1&d=120619236 8">

    My PIC has a 4MHz XTal and Fosc is set to 16. Shouldn't I get something like 4µs (green zone)?
    <img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2434&stc=1&d=120619166 4">

    (1): my oscillo triggers a port that is being set before and cleared after the ADC process. Is it not a valid measurement?
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    Roger
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