I'm working with the AD623 and powering it from 12V, which is the top of the power supply operating range (2.7 - 12V). However the absolute maximum supply voltage rating is ±6V (or 12V) so there is no margin between the two.
I'm assuming it's safe to operate the amp at the top of the "operating range". Why wouldn't there be a margin?
The AD8223 is rated the same way. Absolute max is the top of the operating range.
Is there a reason to spec parts this way?