I would like to know how to decide the condition of "Large signal voltage gain".
For example, AD8542's condition is
RL=100Kohm Vo=0.5 to 2.2V
How to decide this vo condition?
Why 0.5? Why 2.2V?
Other case, OP295's condition is
RL=10Kohm 0.005V<= Vout <= 4.0V
RL=10Kohm no output voltage description.
in this case why 0.005V? Why 4.0V?
In AD8542 case, Vs=5.0V, 3.0V's vo conditions are same as Vs=2.7V.It means to cut the test ? and Avo does not depend on Vs voltage?
For example, condition is Vo= 0.1V to 2.5V,then how much the Avo will degrade?
In OP295's case, why vo is very low?
I would like to know the concept of vo decision.
Avo depends on supply voltage but the AD8542 does not follow this. I don't know why. Usually, for the newer datasheets, the Vo is set to be between 0.5V to 1.5V away from the rails in order to have a better Avo value and this Vo depends on Vsy.
For the OP295, the Vo range was chosen because it is the range that gives a good Avo number.
Hope this helps.
Thank you very much for your help.
It might depend on the designer's idea.
But they select the setting that gives a good Avo number.