AD5762R does not output full +/-10V range

I am using the AD5762R in a design and have them populated on 4 boards.  The output range should be +/-10V, but on 3 of these I get a limited range of -10V to ~+7.5V on both A&B channels.  The DAC on the 4th board works properly.  These were all bought together, probably came from the same lot.  2 of the DACs have these markings:





I do not have access to the other 2 to see if they have identical markings.  Is there a known issue or a configuration step that I am overlooking?