RBIAS value for DP83867

Ken Hashi

Hello.

Noticed that an RBIAS resistance value was changed with DP83867 data sheet to 11kΩ in Rev B from 10kΩ in Rev A.
The customer refers to previous Rev A data sheet, and implement 10kΩ.
（and they made a lot of board for evaluation.
So they do not want to do this change if they can do it.)

What kind of impact is thought about by this difference?
And you please tell this reason that you changed.

Regards.

k-hashi.

over 10 years ago

0 Rob Rodrigues over 10 years ago

TI__Mastermind 19780 points

Hello k-hashi,

Changing the RBIAS resistor from 10k to 11k reduces the power consumed by the PHY. We have done verification that the RBIAS value change does not impact system performance.

If your customer does not want to change, they can continue to use 10k RBIAS.

Changing the value to 11k will reduce power consumption by approximately 50 mW.

Best Regards,

0 Ken Hashi over 10 years ago in reply to Rob Rodrigues

Intellectual 790 points

Hello Rob,

Thank you for your answer.

I understood about this.

Best Regards,

k-hashi.

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RBIAS value for DP83867