Thanks, but page 9 of the datasheet in the top right graph, shows that CMRR goes down to 38dB when the opamp's input goes up to within 0.7V of the Vdd supply rail......that CMRR is probably OK for operation as a unity gain buffer?
Also, page 7 of the datasheet (top left graph), shows the Vdd of the opamp going down to about 1.9V....and this suggests that this is OK...otherwsie they wouldnt have shown anything below 2.7V....?
For opeation as a unity gain buffer i suspect the 2V5 single supply rail and inputs up to 2V will be ok?