AD8619 Vol Measurement

[chandlerbing65nm]

Hi folks,

I have a dilemma here and I need help. In my knowledge, Vol is the measurement of DUT output wrt the negative supply. The passing limit of my Vol is 0-60mV. The typical is about ~40mV. But during my simulation in NI multisim, the value I get rails to 1.808. Hoping that somebody could help me on this.

Here is the configuration:
Vs = +/-0.9V
Il = 1mA
Vcntrl = >0.9V

The attached the config in multisim.

 

[KlausST]

Hi,

What is "Vol"?
What is "DUT" in your circuit?
--> please use the same terminology as in the schematic.

We don´t see the complete circuit...
And your description is very vague...
We don´t know what you expect from the parts to work.
This makes it almost impossible to help.
***

Quite unusual for an OPAMP circuit ( U4A) is the missing negative feedback resistor. It may be correct or not.

Klaus