Passive I/V for TDA1545A

[mamu]

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

[Horizons]

You might find the end of this article interesting:

http://www.diyparadise.com/dackit/1545dackit.html

[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?

[mamu]

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

[guido]

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.

[alfsch]

-------hi,
here a source for tda...
http://www.wieser-electronic.de/

[mamu]

Hi,

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

Ciao
-Matthias

[DonJuan]

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