William "Chops" Westfield wrote:

>>> Looks to me like if you have a design that must be low power, the  
>>> best bet is to avoid having the uncommited op amp in the first place.
> 
> I thought the general conclusion was to configure a voltage follower
> whose input was well within the range allowed for that particular op-
> amp.  For most modern op-amps, doesn't that mean you can parallel the
> input with any of the USED amps in your package ?  

Yes, or possibly not exactly parallel an op-amp input but another analog
level point in the circuit that's guaranteed to stay within limits. If you
have an extreme low-power design with op-amps, I think it's quite likely
that you have a point somewhere that's not too sensitive WRT the extra
load, that's within the limits and that doesn't change too fast.

Gerhard

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