On Fri, 11 Feb 2011 17:46 -0200, "Gerhard Fiedler"  wrote:
> Bob Blick wrote:

> > What is the maximum recommended impedance for the PIC32 A/D? Choose
> > your resistors to be four times that, or less.=20
>=20
> How do you get to "four times that, or less"? Isn't that "two times
> that, or less", for a simple divider like this:=20

Good catch. That would be my brain skipping a beat :)

Two times would be the correct ratio.

If it were a potentiometer instead of two resistors, the impedence is
never more than one-fourth the pot value. Must have been my pre-coffee
fingers typing.

Cheers,

Bob

--=20
http://www.fastmail.fm - Choose from over 50 domains or use your own

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.