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Sound card input impendence

Discussion in 'Electronic Basics' started by Animesh Maurya, Sep 10, 2004.

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  1. Hi all,

    I'm using my sound card for data acquisition. It is inbuilt on my
    Intel 845GL motherboard, named Avance AC97 Audio.

    I need to know the input impendence(line in port) for calculating
    coupling capacitor. Also interested to know max p-p voltage?

    Any help in highly appreciated.


  2. Jamie

    Jamie Guest

    it varies among sound cards a bit but 5k ohm on some Mic inputs
    and 50K on line inputs. these are just some.
    the levels for the line in are usually around .3 to .6 p-p
    and mic input levels can be very sensitive and very alot among
    sound cards.
    if you work around .050 for the max average i think you should
    be ok.
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