DP83867IR: DP83867IRPAP_Board_guideline

Hi Saranaj, 

Your connection looks good. For R194, feel free to use 0 ohm resistor as recommended by the datasheet. 

Best,
J

Hi J,

Thanks for the information.

In the DP83867IRPAP, the power supply connections involve both analog and digital supplies. However, the power supply recommendations indicate a common ground reference. Could you please clarify this?

We have separated the ground reference for the analog and digital power pins. Kindly confirm if this approach is acceptable.
Additionally, for these power supply pins, we are using four channels of the same Source Measurement Unit (SMU). In this scenario, could you please reconfirm whether the analog power supply pins require ferrite beads?

Gratitude

Saran

Hi Saran, 

Because the PHY does not support separate AGND and DGND, we do not recommend hooking the PHY up to a separate GND. 

Ferrite beads are our recommendation to improve EMC performance of the PHY. With the SMU, you may not need ferrite beads but ferrite beads in general is not a requirement for the normal operation of the PHY. 

Best,
J

Hi J,

Based on your information, can i connect VDD1P1, VDDA2P5, and VDDA1P8 to the DGND, despite these being analog power supply pins?

Gratitude

Saran

Hi Saran, 

That is okay. 

Best,

J