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Crosstalk of TS3A226

Peter Wei
Expert 3320 points
Other Parts Discussed in Thread: TS3A226AE

Hi Team,

Since no matter which grounding FET is on, the both channels of LR headphone are sharing the same FET. So the rdson of the FET will make the crosstalk worse. So Lenovo want to know the crosstalk performance with 16ohms and 32ohms loads. Will you help?

  • 0
    TI__Genius 11845 points

    Hello Peter,

    Thank you for your question.

    So Lenovo want to know the crosstalk performance with 16ohms and 32ohms loads. Will you help?

    Absolutely.

    Calculating Crosstalk: 20 * LOG(Vgnd/Voutput)

    Voutput = 1 Vrms

    Vgnd = Voutput * ((Rtrace + Rjack + Rgndfet)/ ((Rtrace + Rjack + Rgndfet) + Raudio))

    Assume 25 mOhms for both trace and jack contact resistance.

    16 ohm crosstalk without TS3A226AE : -50.13 dB

    16 ohm crosstalk with TS3A226AE : -43.31 dB

    32 ohm crosstalk without TS3A226AE : -56.14 dB

    32 ohm crosstalk with TS3A226AE : -49.31 dB

    Regards,

    Jared