Hi Harry and Karen,
I have no intent to be stubborn, nor to give you a hard time... I understand all the evidence point to "REF pin can be used as a voltage reference source." However, I need a direct statement on this topic, just like datasheet says that "REFIN can be used as a source, with an appropriate OpAmp".
This design is extremely important for us. Could I ask if you are 100% sure, that REF pin can be used as an reference source? If not, could you check with the Analog design engineers?
Thank you very much. I and my team appreciate your kind support(we know you dont have to do this), and we apologize for occupying you a lot of time.
Best regards,
Richie