Passive I/V for TDA1545A - diyAudio
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Old 27th September 2004, 09:12 PM   #1
mamu is offline mamu  Germany
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Default Passive I/V for TDA1545A

Hi all!

I'm looking for some suggestions on what values to use for passive I/V conversion for the TDA1545A.
BTW: Is the TDA1545 as good as TDA1543 for passive I/V?

And what's the right/best way to implement the Rvref?
Like it's show in the datasheet using 33K+22K from VDD or applying 11K+11K using a cap in between them. Or the cap at the DAC's reference pin. Will Rvref go from GND or VDD to the reference pin 7?

Hope my questions aren't too silly to get answered by you gurus

Many thanks in advance
-Matthias
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Old 27th September 2004, 10:24 PM   #2
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You might find the end of this article interesting:

http://www.diyparadise.com/dackit/1545dackit.html
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Old 27th September 2004, 11:46 PM   #3
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On a related note, why are there so few 1545-based DIY DACs out there? Seems most of them are 1543-based which I understand but the 1541s are all gone aren't they?
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Old 29th September 2004, 10:40 AM   #4
mamu is offline mamu  Germany
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Thanks Horizons!

The linked article is already known to me.
And it does not contain a schematic on how to apply the cap or what I/V values are right.

Have you found any other source for the TDA1545A?
There're plenty of sources for the TDA1543 but very few for the 1545.

-Matthias
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Old 29th September 2004, 12:07 PM   #5
guido is offline guido  Netherlands
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Quote:
Originally posted by Horizons
On a related note, why are there so few 1545-based DIY DACs out there? Seems most of them are 1543-based which I understand but the 1541s are all gone aren't they?
Think because the input is not i2s. 1541 is still available, check group buy section.
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Old 1st October 2004, 10:05 AM   #6
alfsch is offline alfsch  Germany
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-------hi,
here a source for tda...
http://www.wieser-electronic.de/
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Old 1st October 2004, 10:39 AM   #7
mamu is offline mamu  Germany
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Hi,

thanks!
and here's an even cheaper one
www.kessler-elektronik.de
TDA1545A for EUR 1,49.

Ciao
-Matthias
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Old 5th October 2004, 11:01 PM   #8
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there is a schematic showing how to do passive i/v with 1545.

http://www.diyparadise.com/dacs.html

if you are too lazy...

http://www.diyparadise.com/cs8412-tda1545.gif

donjuan
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