Our customer found the bad resistance AD592 of between pin(+) to pin(-) in their acceptance inspection.
The way of inspection is to use DMM.
1; The stick ( + ) of DMM put on your pin( +).
2; The stick ( -) of DMM put on your pin( -).
3; Measure the resistance, the result is 28Mohm.
5; The stick ( + ) of DMM put on your pin( -).
6; The stick ( -) of DMM put on your pin( +).
7; Measure the resistance, the result is infinity.
This is no problem but he found some sample that the result step-7 was 450kohm.
Your AD592 internal block have current source I know.
DMM will send small voltage from stick( +).
1)Please advice us why above 450kohm result comin? I could not find your internal circuit on you datasheet.
2)Is the above 450kohm AD592 defective?or not?
3)Is the above inspection way no prpblem? Or do you have a good inspection way?
I think that he should add the 5V on pin( +) ,put the 10kohm resister on pin( -) to GND, and measure the voltage on both end of the resister.