LM4951A: Wiring Length

Shotaro Sakai

Intellectual 2900 points

Part Number: LM4951A

Hello team,

My customer is evaluating LM4951A now.

Should the lengths of the Vd+/Vd- to Out+/Out- wires need to be equal?

In the case of our EVM, these are equal.

Best regards,

Shotaro

over 3 years ago

0 Justin Beigel over 3 years ago

TI__Mastermind 18545 points

Hello Shotaro,

Yes, it is a best practice to make sure that the differential traces/wires are the same length. For the case of external wires, using a twisted pair is also beneficial if possible.

Best Regards,

Justin Beigel

0 Shotaro Sakai over 3 years ago in reply to Justin Beigel

TI__Intellectual 2900 points

Justin-san,

Thank you for your support. I understood the same length of traces/wires is needed.

What is concern in case of LM4951A has the difference length traces/wires?

This question is from the customer.

Best regards,

Shotaro

0 Ivan Salazar over 3 years ago in reply to Shotaro Sakai

TI__Guru** 102355 points

Hi Sakai-san,

Impedance mismatch is a concern for difference in trace length.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

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LM4951A: Wiring Length