Rick Mann wrote...

>What should I do with the unused pins on a dual CMOS op-amp (specifically,
>the National LM6482 rail-to-rail op amp)? If anything, is it enough to tie
>the inputs of the unused op amp together? Should they also be grounded?
>
>The datasheet had no recommendations, nor did the FAQ.

You can tie one opamp input (doesn't matter which one) to one supply
rail, and the other opamp input to the other rail, and leave the output
open; or you can tie the output to the inverting input to make a
unity-gain follower, and then tie the non-inverting input to ground or
to either of the rails.

Either way, the output of the opamp is determinate and stable- which is
what you want so the unused opamp doesn't interfere with anything.

HTH...

Dave

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