A/D Converter running? PORTB pullups on?

Any digital inputs between states (that one got ME once).

Scope the PIC pins while in the low power state to see if the "natural"
state of the pins without being driven is opposite to what you think it
is; could be pulling that 250uA that way.

I agree- 980uA seems too high to me as well. You could try the L parts,
they DO draw a lot less.

--Bob

Mike Hord wrote:
> I have a low power design that I'm trying to get as far down
> as possible.  It sits at ~980 uA right now, but over 500 uA of
> that is a "low power" op amp that I'm shopping for a
> replacement for.
>
> I've already gone through the PIC, minimized its current draw
> as much as possible (pins not pulled externally are outputs,
> being driven high or low).  The remaining ~440 uA still seems
> a bit high, since everything on the board is shutdown but the
> voltage regulator.  The sleep currents for the other
> components on the board sum up to less than 200 uA.  Can
> anyone give me some general troubleshooting advice to find
> the hog that's sucking up the other 250 uA?
>
> Mike H.
>
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                Bob Axtell
        PIC Hardware & Firmware Dev
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