MDI Components. 10BASET1L, ADIN2111, EVAL-ADIN2111D1Z,

Hi inagore 

The reason is that the new board EVAL-ADIN2111D1Z supports power forwarding. We selected a larger transformer to allow the use of smaller 47uH power coupling inductors while maintaining the total differential inductance to meet the voltage droop and return loss specification. A 350uH isolation transformer could be used, but it would have required larger inductors.

The isolation transformer, T2 in EVAL-ADIN2111D1Z doesn't have a center tap, while T1 in EVAL-ADIN2111EBZ does. C98, R82, C103 provide common-mode termination through the center tap.

Regarding performance, both the evaluation board designs ensure compliance with the10BASE-T1L standard. The difference in components does not degrade the performance.  

As for the best solution, it depends on the application requirements. If power forwarding or port to port data bypass is needed, the EVAL-ADIN2111D1Z is the better choice as it is specifically designed to support this feature. 

Regards,

Shazia

Hi SMohammadi 

Thank you for your clear answer.