Anybody using the new ESS Vout DAC (ES9022)? - Page 7

qusp · 5th February 2011, 08:03 AM

I assumed that, so you are not doing any boards? I d0oubt I would have any trouble with the soldering

EUVL · 5th February 2011, 08:15 AM

By the time I give you enough instructions to stuff the board in an optimised sequence, I would have finished the soldering myself already.

Patrick

qusp · 09:55 AM

hahaha fair call, OK looks like acko it is. looks like its quite involved and time comsuming for you to make all the modules and i'm sure they are excellent, but I would prefer to stuff something myself, more DIY; i'm sure you understand. I was more meaning if you were going to make something available as a project (not on mass, but more than one), but I reckon youve had your fill of that lately anyway. looks great but

EUVL · 5th February 2011, 10:31 AM

There is enough information from the photos for any true DIYers to copy the layout and make their own PCB in a similar fashion, if they so wish.

Patrick

jkeny · 5th February 2011, 12:18 PM

Quote:

Originally Posted by qusp

thats what i'm talkin' about!! good work mate, I was actually going to ask about balanced output

I already tried a balanced output using 2 ES9022 DACs & inverting the I2S DATA signal into one DAC, then taking the R+/L+ from the analogue out of one DAC & R-/L- from the analogue out of the other DAC. I ran it into headphones wired for balanced input BUT it didn't seem to provide the 3dB increase in volume that I expected balanced operation should give. Was my approach wrong or am I missing something?

EUVL · 5th February 2011, 12:54 PM

> Was my approach wrong ....

No.

> or am I missing something?

Yes.

Image that the output voltage of the IV converter sees a potential divider of say 300R and the impedance of your headphone.
And when you connect as balanced, each DAC only sees the whole of the 300R but only half of the headphone impedance.

Patrick

jkeny · 5th February 2011, 01:05 PM

Ah, so is a buffer the solution - giving a fixed impedance that the output stage sees?

EUVL · 5th February 2011, 02:06 PM

A Compact, High-Performance Source Follower Module

4 of these for 2 channels balanced.

Patrick

jkeny · 5th February 2011, 03:52 PM

Excellent, Patrick, did this neat package ever go up for sale or where can I get them?

EUVL · 5th February 2011, 05:54 PM

You can get them from me.

Patrick

5th February 2011, 09:51 AM	#63
qusp is choosing a less facetious title... diyAudio Member Join Date: Oct 2009 Location: Brisbane, Australia	hahaha fair call, OK looks like acko it is. looks like its quite involved and time comsuming for you to make all the modules and i'm sure they are excellent, but I would prefer to stuff something myself, more DIY; i'm sure you understand. I was more meaning if you were going to make something available as a project (not on mass, but more than one), but I reckon youve had your fill of that lately anyway. looks great but Last edited by qusp; 5th February 2011 at 09:55 AM.

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5th February 2011, 08:03 AM	#61
qusp is choosing a less facetious title... diyAudio Member Join Date: Oct 2009 Location: Brisbane, Australia	I assumed that, so you are not doing any boards? I d0oubt I would have any trouble with the soldering

5th February 2011, 08:15 AM	#62
EUVL diyAudio Member Join Date: Oct 2003	By the time I give you enough instructions to stuff the board in an optimised sequence, I would have finished the soldering myself already. Patrick

5th February 2011, 10:31 AM	#64
EUVL diyAudio Member Join Date: Oct 2003	There is enough information from the photos for any true DIYers to copy the layout and make their own PCB in a similar fashion, if they so wish. Patrick

5th February 2011, 12:54 PM	#66
EUVL diyAudio Member Join Date: Oct 2003	> Was my approach wrong .... No. > or am I missing something? Yes. Image that the output voltage of the IV converter sees a potential divider of say 300R and the impedance of your headphone. And when you connect as balanced, each DAC only sees the whole of the 300R but only half of the headphone impedance. Patrick

5th February 2011, 01:05 PM	#67
jkeny Banned Join Date: Feb 2007 Location: Dublin	Ah, so is a buffer the solution - giving a fixed impedance that the output stage sees?

5th February 2011, 02:06 PM	#68
EUVL diyAudio Member Join Date: Oct 2003	A Compact, High-Performance Source Follower Module 4 of these for 2 channels balanced. Patrick

5th February 2011, 03:52 PM	#69
jkeny Banned Join Date: Feb 2007 Location: Dublin	Excellent, Patrick, did this neat package ever go up for sale or where can I get them?

5th February 2011, 05:54 PM	#70
EUVL diyAudio Member Join Date: Oct 2003	You can get them from me. Patrick