I have a doubt regarding an opamp non inverting amplifier. I am using a dual opamp AZ4580MTR. One opamp is configured as a non inverting amplifier having gain 2 and the other is a voltage follower. The input of the opamp is connected from a DAC AD5675. When I reduced the input to 0v, then the Output is about 11v. If a any other input voltage like 1 or 2v applied to the input, it gives the correct output(as per the gain). How this this circuit is behaving like this, if I changed the opamp to any other part will it works fine or work like this? Waiting for a reply. Regards Sebastian
Look at page 6, find "Input Common Mode Voltage Range ±12V (with ±15V supplies)." This means input common mode must be at least 3V away from power rails.
Opamp is not rail to rail.
If you supply this opamp with a single supply (ie, 0V/+15V) and not with ±15V then obviously its input common mode range will +3 ... +12V and not ±12V .
Your 0V signal is not inside the interval +3 ... +12V therefore the opamp does not work as intended.
Use the right rail to rail opamp.