What is the meaning of "branding" in ADM6315 Datasheet?

Hello,

As ADM6315 Datasheet, there are many kinds of Brandings like MDV,M9Q,MDU,M81 and etc.

But I don't know exact meaning of these.

Would you let me know the meaning of branding in ADM6315 Datasheet?

And also would you let me know the meaning of each elements (MDV,M9Q,MDU,M81 and etc) in Branding row?

Please refer ORDERING GUIDE in ADM6315 Datasheet and let me know these meansings.

Regards,

Se-woong

ADM6315.pdf