looking for OPAMP,Vcc max=12v or more,Offset=less then 60uv,Rail 2 rail,Size=SC70
I found the OPA735 which meet these4 parameters but not in SC70 package.
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Unfortunately, I do not see any low offset devices in SC-70's, either.
The closest matches would be the LMV641 or LMV841 in a SC-70 - but both are 500uV room max.
Unfortunately, "precision" devices are tough to fit into small packages due to trimming structures and/or larger input devices. Choppers need room for the CMOS front-end switches and internal loop filters. So you do not see many high precision devices in tiny packages.
It looks like the smallest packages available will be the SOT-23, with most in the MSOP-8 or LLP package (OPA2188/OPAx735/OPAx211).
Sorry...you may have to "downgrade" to a SOT-23 or MSOP-8.