>Date:    Tue, 3 Jun 1997 18:09:04 -0400
     >From:    Jim Ruxton <cinetron@PASSPORT.CA>
     >Subject: Can you suggest an OP AMP?

     Jim,

        Try the Maxim MAX433_ESA/ESD the Vos <= 600 uV max @ 25C.]
     Beware of generic CMOS Op-amps some of them have high Vos.
     Don't forget that the Quantization and Noise effects of your
     ADC will add at least two counts of error = 39.2 mV (worst case).
     I'm sure that Analog Devices, Mot, NSC, and others have comparable
     parts, But I have had good luck with Maxim.  Ask for some free
     samples at 1-800-998-8800.  (Note:  I have no affiliation, just
     a satisfied customer).  Also, Ibias is as high as 65 nA, so size
     you input resistors accordingly.  Make sure you use Kelvin style
     lead attachments to you sense resistor so that you don't pick
     up ground shifts (small signal wires coming off of the leads
     of the resistor back to you Op-Amp in addition to the fat high current
     traces that go Load to ground).  Check out Dale (Vishay) and IRC for
     .01 ohm resistors.

     Good luck,

     Tim Crist