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DP83869HM: Using RJ45 connectors with integrated magnetics

Marek Havelka
Prodigy 20 points
Part Number: DP83869HM

Tool/software:

Hello TI team!

I have a question regarding RJ45 connectors with integrated magnetics - in one of our development projects we are planning to use DP83869HM as a PHY for copper interface. One of the possible RJ45 connectors which we are considering is a connector with integrated magnetics and integrated central tap connection (as shown in the picture). 

I know about the recommendation in the datasheet of the PHY and wanted to ask - is the configuration with DP83869HM and connected central taps be functional with for example decreased EMI performance or the PHY won't work at all?

BR, 

Marek

  • +1
    TI__Genius 12611 points

    Hi Marek,

    Yes, the recommendation is to have each center tap to be isolated from one another and be connected to GND via a decoupling capacitor. I would not suggest to use this RJ45 connector since it can cause channel to channel crosstalk and decreased EMI performance. 

    Please let me know if you have other questions. 

    Best,
    J