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tlv320aic3106 impedanc matching

Misty
Prodigy 15 points
Other Parts Discussed in Thread: TLV320AIC3106

hi anyone:
i use the tlv320aic3106 to make an audio codec. however,i can't find its design guide.

can anybody tell me is there any special signals need to do impedance matching,if not what is the  impedance  range of the general single ended signals?
thx!

  • 0
    TI__Genius 9175 points

    Hello,

    Impedance matching from a source to the input impedance of the part is not necessary.  Likewise, matching the output impedance of the part to an external load is not necessary. This is not a good idea since it will cause large voltage division.

    Generally, your sources should be low impedance relative to the input impedance. The load impedance should be large relative to the output impedance.

    For differential inputs, it is always recommended to match the impedance of the + and  - input pair. DC blocking capacitors on these inputs should be X5R or better with tight tolerances to ensure that the impedance is the same. The trace length and routing should also be as identical as possible to keep stray inductance and capacitances equally distributed.

    Regards,

    Matt