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OPA211: OPA211

Part Number: OPA211

Hello

 I ordered part # OPA211AIDR  and from what i see on the data sheet the part marking should be OPA 211 A   but the parts we received are marked 

A  TI  OPA

     211  K

42CFED

How do we know if we have the correct parts since they do not match the part marking shown on the data sheet ?  Can you please help me figure this out ?

thank you 

Christina Snyder