I want to simulate the offset from ADA4528 (http://www.analog.com/static/imported-files/data_sheets/ADA4528-1_4528-2.pdf).
I have simulate it, as can be seen in the appendix.
I get a voltage Uout of 10uV.
The offset is then: Uos = Uout * R1/(R1 + R2) = 10uV * 10k/ 20k = 5uV
In the datasheet (page4) is specifies a value of 0,3uV (typ) and 2,5uV(max).
Is my simulation correct? Can I measure the offset on this way or why comes the difference?
Later, I want to supply the circuit with +-2,5V. Can I expect that the offset is then +-0,3uV( typ) or is it only positiv ?
In the datasheet there are the specification: VSY = 2.5 V, VCM = VSY/2. Is VCM the common mode voltage: ( -IN + +IN )/2 ?
Thank you for your help