DS250DF810: Ds250df810 differential wiring impedance

user4838693

Prodigy 190 points

Part Number: DS250DF810

Ds250df810 we use for 25gbps signals.

What is the recommended impedance of ds250df810 differential wiring?

If RX and TX, differential wiring impedance is 95 Ω +/- 10%, is there a problem?

over 5 years ago

0 Nasser Mohammadi over 5 years ago

TI__Guru* 93570 points

Greetings,

At 25Gbps, 100-Ohm +/-10% is recommended. However, 95 ohm +/- 10% is far off the required impedance and this would affect return loss and thus signal integrity.

Regards,, Nasser

0 user4838693 over 5 years ago in reply to Nasser Mohammadi

Prodigy 190 points

So does it mean that the impedance inside the chip is 100 Ω?

0 Nasser Mohammadi over 5 years ago in reply to user4838693

TI__Guru* 93570 points

Greetings,

Yes back termination is 100 ohm.

Regards,, Nasser

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DS250DF810: Ds250df810 differential wiring impedance