Hi,

Probably everything is OK. Most op-amps have current limiting on
short-circuit conditions, and if the over-voltage condition was of short
duration the PIC inputs may survive.

I suppose your PIC is powered from 5V, right? I already abused PIC
micro-controllers much more than this (swapping Vcc and Vss, powering
from 9V, short-circuiting outputs at Vcc, etc) and never killed any.

The new low-voltage parts may be more sensible to such abuses, but the
standard PIC12/16/18 are very rugged.

To be sure, just test it. If it works, then no worry.

Regards,

Isaac

Matthew Rhys-Roberts escreveu:
> Oops, I just managed to apply full positive output voltage from a low =

> power 12v op-amp into two PIC ADC inputs. The pin voltages seemed to =

> clamp to about 6.5v, which I hope might be the action of e.g. a =

> protection ("idiot") diode.
>
> Hands up who thinks I've caused any damage?
>
> Matt
>   =

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