DP83867IR: DP83867IR: EMI noise

Steve Turza

Part Number: DP83867IR
Other Parts Discussed in Thread: AM6412

EMI Test Failing Class B by 10dB @ 125MHz when linked using 1000Base-T.

Product is a plastic case, using AM6412 RGMII interface.

Bob Smith temination "chassis GND" connected to Main board digital GND via 1nF 2KV capacitor.

Integrated magnetics used, PHY side includes 4 separate center-tap capacitors for each winding.

04_12VDC_TWO_Normal_Operation_Vert_2026-06-19-11_12_07.png

0 Gregory Kobyakov 13 days ago

HI Steve,

Can you share a schematic of the device configuration?

Best regards.

Greg

0 Steve Turza 13 days ago in reply to Gregory Kobyakov

0 Gregory Kobyakov 12 days ago in reply to Steve Turza

Hi Steve,

Thanks, I will review this and get back to you as soon as possible.

Best regards,

Greg

0 Gregory Kobyakov 5 days ago in reply to Gregory Kobyakov

Hi Steve,

We recommend a few next steps to identify the root of the failed test:

Best regards,

Greg

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