Stacked TDA1543. Need matching?

drjlo · 7th June 2008, 03:57 AM

For say a TDA1543 x16 parallel DAC, how important is matching? As you use more number, I would assume the pluses and minuses will sort of hopefully even out..

I ask b/c I can't find any source that sells matched TDA1543 chips. If you know a source for matched TDA1543 chips, do let me know. Heck, let me know if you know a good source of unmatched chips in U.S.

flshzug · 7th June 2008, 04:57 AM

just pick 1 good out of 200 and be done with it.

drjlo · 7th June 2008, 06:35 PM

I already have 8x TDA1543 DAC. I'm just trying to add 8 more as I have empty sockets for them..

flshzug · 8th June 2008, 05:21 AM

okay : D

Spartacus · 8th June 2008, 11:26 PM

They don't need matching.

dddac · 9th June 2008, 09:09 PM

I tried it once, but could not find any chips (tried 300) which were clearly better than the rest. That is when my idea of stacking chips was born by the way

ergo, save your time and just stack more chips

received this week this response from a DIY who went from 12 to 24 chips:

...two boards (24 chips) it's a must have for all, a big improvement. Shame i don't have space for a third one...

take care
doede

amc184 · 9th June 2008, 11:18 PM

A good source for TDA1543 ICs is Futurlec, with a price of only US$1.95 for small quantities. I have used these guys before, they are fairly slow, and their range is fairly limited, but they sure are cheap.

As people have said, you don't really match these ICs, the paralleling is to average out the differences in each chip.

drjlo · 10th June 2008, 02:26 AM

Quote:

Originally posted by amc184
A good source for TDA1543 ICs is Futurlec, with a price of only US$1.95 for small quantities. I have used these guys before, they are fairly slow, and their range is fairly limited, but they sure are cheap.

As people have said, you don't really match these ICs, the paralleling is to average out the differences in each chip.

Darn. I just missed this post by a day and already ordered them on Ebay for the usual $4.50/each. Maybe next time.

Now if I could just find some cheap heatsinks for the TDA1543's, ones to go on top surface of each chip or maybe two across..

dddac · 10th June 2008, 04:33 AM

seems my site is the secret place

7th June 2008, 03:57 AM	#1
drjlo diyAudio Member Join Date: Jul 2005 Location: SoCal	Stacked TDA1543. Need matching? For say a TDA1543 x16 parallel DAC, how important is matching? As you use more number, I would assume the pluses and minuses will sort of hopefully even out.. I ask b/c I can't find any source that sells matched TDA1543 chips. If you know a source for matched TDA1543 chips, do let me know. Heck, let me know if you know a good source of unmatched chips in U.S.

9th June 2008, 09:09 PM	#6
dddac diyAudio Member Join Date: Jul 2003 Location: Wiesbaden	I tried it once, but could not find any chips (tried 300) which were clearly better than the rest. That is when my idea of stacking chips was born by the way ergo, save your time and just stack more chips received this week this response from a DIY who went from 12 to 24 chips: ...two boards (24 chips) it's a must have for all, a big improvement. Shame i don't have space for a third one... take care doede __________________ www.dddac.de Happy listening and building

10th June 2008, 04:33 AM	#9
dddac diyAudio Member Join Date: Jul 2003 Location: Wiesbaden	seems my site is the secret place __________________ www.dddac.de Happy listening and building

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7th June 2008, 04:57 AM	#2
flshzug Banned Join Date: Dec 2007	just pick 1 good out of 200 and be done with it.

7th June 2008, 06:35 PM	#3
drjlo diyAudio Member Join Date: Jul 2005 Location: SoCal	I already have 8x TDA1543 DAC. I'm just trying to add 8 more as I have empty sockets for them..

8th June 2008, 05:21 AM	#4
flshzug Banned Join Date: Dec 2007	okay : D

8th June 2008, 11:26 PM	#5
Spartacus diyAudio Member Join Date: Jan 2002 Location: Cheltenham	They don't need matching.

9th June 2008, 11:18 PM	#7
amc184 diyAudio Member Join Date: May 2007 Location: Christchurch	A good source for TDA1543 ICs is Futurlec, with a price of only US$1.95 for small quantities. I have used these guys before, they are fairly slow, and their range is fairly limited, but they sure are cheap. As people have said, you don't really match these ICs, the paralleling is to average out the differences in each chip.

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