DP83867IS: Can the MDI interface adjust the drive current or drive voltage?

user5707026

Genius 3145 points

Part Number: DP83867IS

Dears

Can the MDI interface adjust the drive current or drive voltage?

Thanks

Elsa Duan

over 4 years ago

0 Cecilia Reyes over 4 years ago

TI__Genius 9920 points

Hi Elsa,

DP83867 is a voltage mode driver there is no current drawn from magnetics of PHY

Thanks

Cecilia

0 user5707026 over 4 years ago in reply to Cecilia Reyes

Genius 3145 points

Hi Cecilia

Thanks for your result.

In fact, what I want to know is whether the MDI port can adjust the voltage amplitude?

There is a problem with the test. The peak voltage of the test template that comes with the oscilloscope is too high and False appears.

I want to try to adjust. How to achieve it?

Thanks

Elsa Duan

0 Adrian Kam over 4 years ago in reply to user5707026

TI__Expert 5425 points

Hello,

Cecilia is currently out of office and will respond back tomorrow.

Regards,

Adrian Kam

0 Cecilia Reyes over 4 years ago in reply to Adrian Kam

TI__Genius 9920 points

Hi Elsa,

Have you confirmed your RBIAS is at 1% tolerance? That can affect the peak output voltage. Can you also please clarify which test exactly is failing in compliance?

Cecilia

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DP83867IS: Can the MDI interface adjust the drive current or drive voltage?