AD7811YR date code

Hello dieptula,

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 

You can get more information on this topic on our website at Quality and Reliability Programs | Analog Devices

Best regards,
Paul