DP83822I: DP83822I schematic review

Nic Lin

Intellectual 2020 points

Part Number: DP83822I

Hi Team,

We desinged in DP83822I in a BT speaker application. Could you please help to review below schematic and let me know if you have any concerns? It is working at RGMII mode. Thanks.

Regards,

Nic

over 5 years ago

0 Aniruddha Khadye over 5 years ago

TI__Mastermind 18425 points

Hi Nic,

I can have the schematic reviewed by early next week.

-Regards

Aniruddha

0 Nic Lin over 5 years ago in reply to Aniruddha Khadye

TI__Intellectual 2020 points

Thanks Aniruddha! Wait for your feedback.

0 Nic Lin over 5 years ago in reply to Nic Lin

TI__Intellectual 2020 points

Hi Aniruddha,

Do you have a channce to talk a look yet? Thanks.

Regards,

NIc

0 Aniruddha Khadye over 5 years ago in reply to Nic Lin

TI__Mastermind 18425 points

Hi Nic,

Following are some comments on the schematics,

Magnetics connection needs to match the datasheet figure 33. I do not see decoupling capacitors on center taps. center taps should also be pulled up to AVDD.

49.9ohms resistors should be placed close to the device.

RBIAS resistor should be 1% tolerance

25MHz input clock should meet the datasheet requirement.

In mode 2 strap on RX_ER pin, Auto MDIX will be disabled. Check if this is a requirement for the system.

33ohm series termination resistors can be replaced by 0ohm. DP83822 has internal termination resistors.

-Regards

Aniruddha

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DP83822I: DP83822I schematic review