DP83620: About recommended circuits

Ryu Yamashita

Part Number: DP83620

Tool/software:

Hi team,

Can the 49.9Ω in Figure 9-1 be changed to another resistance value?
I am concerned that 49.9Ω would consume too much VDD.

Best Regards,
Ryu.

7 months ago

+1 David (ASIC) Liu 7 months ago

TI__Guru**** 176581 points

Ryu-san

The 49.9ohm +/-1% provides the termination network. Changing to other resistance would result in impedance mismatch and reflection.

Thanks

David

0 Ryu Yamashita 7 months ago in reply to David (ASIC) Liu

Genius 3625 points

Hi David,

Thanks for the reply.
I understood that the resistance cannot be changed.
Is there any other way to reduce the power consumption?

Best Regards,
Ryu.

+1 David (ASIC) Liu 7 months ago in reply to Ryu Yamashita

TI__Guru**** 176581 points

Ryu-san

I do not see a way to reduce the power consumption, please see this app note on the power measurement we have done on our Ethernet PHY products, https://www.ti.com/lit/an/snla089b/snla089b.pdf.

Thanks

David

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DP83620: About recommended circuits