You can connect it to a voltage between 0 and Vdd plus or minus whatever
the datasheet says.  No series rsistance.  The datasheet also says the
source impedance should be 10K Ohms or less.

Dale

On Mon, 23 Apr 2001, Graham North wrote:

> Sorry, can someone answer my other question?
>
>
> >Hi I'm having some problems with the ADC on the 16F877. Am I correct in
> >thinking that I can connect the sampling pin straight to a voltage (is this
> >limited to 0 -> 5 Volts). Is some sort of protection recomended.
> >
>
> Thanks
>
> Graham
>
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