Sound card input impendence

- A
- Animesh Maurya
  
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posted
19 years ago

Fri, Sep 10, 2004 2:30 PM

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.

Thanks

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- J
- Jamie
  
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posted
19 years ago

Fri, Sep 10, 2004 7:13 PM

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.

Animesh Maurya wrote:

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