Could you please clarify? The markings for 25 years and 24 years are different. May I ask what the original marking represents?
AD694
Production
The AD694 is a monolithic current transmitter that accepts high level signal inputs to drive a standard 4-20 mA current loop for the control of valves...
Datasheet
AD694 on Analog.com
Could you please clarify? The markings for 25 years and 24 years are different. May I ask what the original marking represents?
Hello xinxi,
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. 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 products, please ensure all purchases are made through the ADI authorized distributors and sales offices listed on our website at Sales and Distribution | Analog Devices
Best regards,
Paul