Anybody using the new ESS Vout DAC (ES9022)? - Page 7 - diyAudio
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Old 5th February 2011, 08:03 AM   #61
qusp is offline qusp  Australia
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I assumed that, so you are not doing any boards? I d0oubt I would have any trouble with the soldering
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Old 5th February 2011, 08:15 AM   #62
EUVL is offline EUVL  Europe
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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
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Old 5th February 2011, 09:51 AM   #63
qusp is offline qusp  Australia
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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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Old 5th February 2011, 10:31 AM   #64
EUVL is offline EUVL  Europe
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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
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Old 5th February 2011, 12:18 PM   #65
jkeny is offline jkeny  Ireland
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Quote:
Originally Posted by qusp View Post
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?
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Old 5th February 2011, 12:54 PM   #66
EUVL is offline EUVL  Europe
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> 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
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Old 5th February 2011, 01:05 PM   #67
jkeny is offline jkeny  Ireland
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Ah, so is a buffer the solution - giving a fixed impedance that the output stage sees?
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Old 5th February 2011, 02:06 PM   #68
EUVL is offline EUVL  Europe
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A Compact, High-Performance Source Follower Module

4 of these for 2 channels balanced.


Patrick
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Old 5th February 2011, 03:52 PM   #69
jkeny is offline jkeny  Ireland
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Excellent, Patrick, did this neat package ever go up for sale or where can I get them?
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Old 5th February 2011, 05:54 PM   #70
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You can get them from me.

Patrick
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