Consider using a Sigma-Delta converter using the comparator.
AFAIR Scott D gets about that many bits with SD using PIC pins alone (no
comparator).

        RM

>. I would like
> to make a 9 bit slow a/d (maybe 10 bits) using a relatively precise linear
> ramp (coming from a cmos opamp section on board). Also comparative
> comments (PIC comparator vs. Atmel).

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