Hello,

Does anyone know the formula to determine Tad for a given clock frequency
and A/D clock setting.  I'm using a 20MHz clock and thus have the A/D clock
set to 32Tosc.  According to page 115 of the PIC16F87x manual, Tad ~ 4us
when using the internal A/D oscillator, but there is no meantion of how to
determine this time for other A/D clock settings.  I realize I could just
measure the time, but what I am really interested in is the worst case time
and what the factors are effecting the Tad time.

Regards,
Donovan

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