I have used Multisim 12.0 to simulate a circuit just like shown below.
It is a current source. R sensor is the load. The current is set by Vref/Rset.
If I used AD8603(V1 is set by 5V). The waveform is correct. If I used ADA4638.
The waveform is just like below. It is not correct.
I want to know, What is the problem? I think ADA4638 is a good AMP.
I think, The Multisim has not set the correct initial status. Is it correct?
If I want to use ADA4638 for this circuit, What need I do? Add some parts? Or other ways?
Thanks a lot!