Thanks for your help and suggestions. I tried the following: remove emulator
from target. Power up target. Run emulator until IO has been configured.
Confirmed amplifier is putting out correct voltage. Confirmed that TRISA,
ADCON0, ADCON1 are correct.  Re-insert emulator. Re-checked amplifier. 5.6V
:( As soon as I remove the emulator, the output voltage is again correct.

It's mystifying why only ONE of the two amplifiers is causing this, or maybe
it is just AN2? Both amplifiers use the same input signal.

I will next cut the trace to AN2, and solder a wire to the unused AN4.

Phil Eisermann
Electronics Engineer
The Ridge Tool Company
(440)329-4680


> -----Original Message-----
> From: Bob Blick [mailto:bobblick@COVAD.NET]
> Sent: Friday, June 27, 2003 1:39 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: ICEPIC emulator ADC trouble
>
>
> OK, I'm almost certain it's the inamp latching up.
>
> It's a power sequence issue. The PIC is momentarily putting
> current out to
> the inamp output, before the inamp is powered up.
>
> One of the reasons I hate emulators!
>
> Cheers,
>
> Bob
>
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