AD623ARZ-R7 application issue caused the voltage on pin 6 is too high

I have moved this question about AD623ARZ-R7 to the Instrumentation Amplifier community.  Someone here should be able to assist you.

Could you provide the contact window to me soon as it is top urgent.

Hi,

Unfortunately, we are unable to provide information about parts in the EngineerZone community based on their markings. We suggest going back to your point of purchase to get this information. Note that ADI only provides warranty coverage or any quality, reliability, failure analysis, applications, or other support on products purchased through ADI authorized distributors and sales offices. To ensure you are receiving unused, legitimate ADI product, please ensure all purchases are made through the ADI authorized distributors and sales offices listed on our website at: www.analog.com/.../continent.asp.
You can get more information on this topic on our website at:www.analog.com/.../index.html

Thanks,

Kristine

We have discussed the problem and we think that the AD623 is operated out of specifications. The datasheet specifies minimum output voltage of 200mV, so you can't expect normal operation if it is not met. In your case the amplifier's output is saturated and it does not work as a normal inamp. Different chip markings can mean different behaviour in such state, so it does not mean that the IC is defective. To solve the problem you can try to find another inamp with lower specified output voltage. If you want to keep the AD623, then you can apply negative supply voltage at pin 4. Alternatively, you can shift the output safely above 200mV by applying a bias voltage to the REF pin and configuring the AD694 input to use the difference between the output voltage and REF voltage of the AD623.
We hope we could help you in time.