Glenn Jones wrote:
> I have no preference for through hole vs. surface mount. I do not
> expect any large current capability from the reference, I intend to
> buffer it with an op-amp, but if there are references out there that
> can supply 10 - 50 mA, that'd be great.

First, 50mA is "large" current for a voltage reference.  Second, buffering
with an opamp is going to introduce additional errors.  You wanted the
result to be 2.5V within 10mV.  The opamp will eat up a millivolt or two due
to its offset voltage.

You should step back and explain the overall problem.  You seem to have
jumped into the middle specifying something without understanding the
tradeoffs and what's out there.  It sure sounds like this problem needs to
be solved with a more global look at the circuit.


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