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AD797 Offset Nulling with zero-drift op-amp

Hi Analog Engineers,

I see in the LT1028 datasheet (as well as in AN-21) that one can use a zero-drift amplifier to offset trim an amplifier.  It is stated that this lowers the offset drift: from uV/C to nV/C (which is pretty amazing).  I am guessing that this can be done with AD797 as well, only that you reference the negative supply versus the positive supply.  Am I correct in assuming this is the way to do it, or that it can even be done with AD797?

Thanks,

Doug