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 until output goes to 4.54V.Being a rail to rail op amp I though it would be possible to go until Vcc - 20mv = 5.20V - 20mV or so but no way...I measured 13uA output current.
If I build a simple follower with Vcc=+5V and i put 5volts at input I see output is 4,35V at most.
I need full 0+5V range because this is for an ADC based temperature meter,so temperature range spans the full ADC range.And AD822 is claim to be rail to rail.
Do you know why is this or what could i test? So bad is this chip?
I´m measuring with no load.
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 until output goes to 4.54V.Being a rail to rail op amp I though it would be possible to go until Vcc - 20mv = 5.20V - 20mV or so but no way...I measured 13uA output current.
If I build a simple follower with Vcc=+5V and i put 5volts at input I see output is 4,35V at most.
I need full 0+5V range because this is for an ADC based temperature meter,so temperature range spans the full ADC range.And AD822 is claim to be rail to rail.
Do you know why is this or what could i test? So bad is this chip?
I´m measuring with no load.