AD822 not rail to rail?

[po210]

Hello

I´m using an AD822 to build a simple 2,2 gain differential amplifier with R1=100K, R2=220K. My single supply is 5.20V and in ouput i see linear amplification until output goes to 4.54V.Being a rail to rail op amp I though it would be possible to go until Vcc - 60mv = 5.20V - 60mV or so but no way...
Do you know why is this or what could i test? I´m measuring with no load.

Thank you

 

[nigelwright7557]

It should go to 10mV off the rails.

 

[po210]

I know.That's the reason why i'm asking here...
I also know it depends on output current taken or given by the opamp.But with no load it sources only 13uA.