TLV320AIC3109-Q1: Routing Impedance

Mayur M Bharadwaj

Part Number: TLV320AIC3109-Q1
Other Parts Discussed in Thread: TAS2505-Q1, TAS2505

Dear team,

We are using TLV320AIC3109-Q1 and TAS2505-Q1.

We wanted to know the routing impedance of differential pair of mic input, signal from codec to speaker, and speaker output.

11 months ago

0 Ivan Salazar 11 months ago

TI__Guru** 100965 points

Hi Mayur,

I can help with TAS2505, I'll get comments from a colleague for AIC device.
Regarding TAS2505, the routing for speaker output should be as symmetrical as possible, you can even route as differential pair. Are you looking for something specific?

Best regards,
-Ivan Salazar
Applications Engineer

0 Mayur M Bharadwaj 11 months ago in reply to Ivan Salazar

Intellectual 370 points

Hello Ivan,

Thank you for the feedback.

Is there any specific impedance like 90 ohm / 100 ohm etc. to be maintained for these differential lines?

+1 Ivan Salazar 11 months ago in reply to Mayur M Bharadwaj

TI__Guru** 100965 points

Hi Mayur,

No special requirements for TAS2505 speaker output. Just try to make the connection as close to the amplifier as possible to minimize losses.

Best regards,
-Ivan Salazar
Applications Engineer

0 Mayur M Bharadwaj 10 months ago in reply to Ivan Salazar

Intellectual 370 points

Hello Ivan,

Thanks for the feedback. Will wait for feedback for codec.

+1 Ivan Salazar 10 months ago in reply to Mayur M Bharadwaj

TI__Guru** 100965 points

Hi Mayur,

Feedback from CODEC is similar, no strict requirements for differential pair impedance due to considerably high input impedance in audio applications, just keep the routing as symmetrical as possible.

Best regards,
-Ivan Salazar
Applications Engineer

0 Mayur M Bharadwaj 10 months ago in reply to Ivan Salazar

Intellectual 370 points

Hello Ivan,

Thank you for the feedback.

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TLV320AIC3109-Q1: Routing Impedance