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Richard Crowley
 
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"bans25" wrote in message
...
HI all,

I am new to playing in the audio / video world so forgive me if I ask
dumb questions! .

Currently interfacing to a TI AIC23 (
http://focus.ti.com/lit/ds/symlink/tlv320aic23b.pdf ) audio codec
with consumer line level inputs and outputs.

What I need to do is make a PCB that will convert these 1Vrms I/O's to
interface with Professional equipment (+4dbu).

So I will need to PAD the input to the codec ( +4dbu Professional line
level ---- -10dbv Consumer line level) right? 12db pad?

and then I need to amplify the output of the codec (-10 dbv Consumer
line level ---- +4dbu Professional line level) 12db amp.

Here is the catch, I would like to be able to still also interface my
AIC23 to consumer equipment or professional equipment and select the
pad/amp via software control.

Does anyone know of any ICs that may help me out to do this? maybe
some digitally controlled pots?

I need to fit this circuitry on a 3" x 3" board to fit in the box.


You might find it useful to poke around the circuits published
on the Jensen Transformer website.....
http://www.jensentransformers.com/apps_sc.html