Roman wrote...

>Does anyone have a source for single-rail (ie does
>not need -ve power rail) dual opamp with high precision?
>To run from 5v supply only with inputs between 0v and
>250mV. Pref <10mV input error.

Roman,

Here are a few from National Semiconductor that I've used:

LMC6062 CMOS micropower, Vos < 1mV, low-frequency
LMC6482 CMOS RRIO, Vos < 10mV, 1MHz bandwidth
LM6132 bipolar RRIO, Vos <10mV, 10 MHz bandwidth

DD

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