> - If I were to use a current-limiting resistor on the inputs, then that will 
> have some effect on the actual measured value at the input pin, and the 
> charging time for the internal hold capacitor, right?  How would I calculate 
> for the effects of this?

In the ADC section of the datasheets they usually give the formulas
involved and an example calculation for the effect of an input resistor on
the required acquisition time.

Regarding the effect of the input leakage current on the measured voltage,
you simply multiply your input resistor with the maximum leakage current,
which gives you the maximum voltage error for this resistor.

Gerhard
_______________________________________________
http://www.piclist.com
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist