Since it is an analog circuit, it is possible that it will not work at 3.3V, but the manufacturer has tested it before shipment and guarantees its characteristics from 5V.
Generally speaking, the following characteristic deterioration occurs.
　
・Decrease in the differential pair current inside the IC/input stage and reduction in the gm of the differential pair reduces the open loop gain and, due to its effects, lowers the common mode voltage rejection ratio and lowers the slew rate.
・Decrease in the maximum output current value (due to the increase in the resistance value of the FET inside the IC at the output stage).
　
The AD822 data sheet provides reference values for VS = 3.0V, 5.0V, and ±15V.
・Open loop gain
・Common mode voltage rejection ratio
・Maximum current value when the load is shorted
Since the characteristic graph of Please make yourself useful.

(Published in March 2022)

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