Bragi, an Asynchronous ES9023 DAC with isolated I2S Input and Alps RK27 Volume pot - Page 3 - diyAudio
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Old 19th November 2012, 06:37 PM   #21
marce is offline marce  United Kingdom
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Nice simple design, and neat layout (though there is a lot of spare space )
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Old 19th November 2012, 06:51 PM   #22
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Originally Posted by marce View Post
Nice simple design, and neat layout (though there is a lot of spare space )
Thanks.
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Old 20th November 2012, 08:16 AM   #23
syklab is offline syklab  Hong Kong
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Hi,
What is IC1 and what is it for?

Thanks
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Old 20th November 2012, 09:08 AM   #24
marce is offline marce  United Kingdom
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IC1
http://cds.linear.com/docs/Datasheet/1763fg.pdf
Main supply in regulator.
One comment on using VEE etc for supply names, its better to use explicit voltages, it makes the schematic much easier to read and use for fault finding layout etc.
For your info is part of a guide to doing Schematics that I have done, this is art of the chapter covering net naming conventions. These naming conventions are used to specify signal and what they are explicitly to other users of circuit diagrams namely PCB design, Test and fault finding. We often get schematics with thousands of connections and nets, that have to be laid out correctly, using these naming conventions and other facilities within your CAD system (different connection codes, for ground signal, power etc, attributes or editable properties), even simple designs can benefit as it helps get things right, and improve the communication of data. There is also an IPC specification finally for schematics (IPC-2612-A), that is worth following especially if you are doing commercial work (and DIY or Hobby), the problem is you have to purchase that.
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File Type: doc SCHEMATIC NET NAMING CONVENTIONS.doc (33.5 KB, 50 views)
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Old 20th November 2012, 06:16 PM   #25
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Some pictures.

The wiring is not up to my usual standards but for testing it is ok.
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File Type: jpg 2.JPG (689.6 KB, 470 views)
File Type: jpg 3.JPG (807.0 KB, 465 views)
File Type: jpg 4.JPG (610.3 KB, 442 views)
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File Type: jpg 6.JPG (692.3 KB, 263 views)

Last edited by Neutrality; 20th November 2012 at 06:21 PM.
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Old 20th November 2012, 11:22 PM   #26
rade95 is offline rade95  United States
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Great news. Just wondering if es9023 supports I2C for digital volume like es9012/18 do?
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Old 20th November 2012, 11:32 PM   #27
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No ES9023 doesn't support digital volume control.

It has a mute pin along with the usual power, i2s inputs and outputs.
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Old 21st November 2012, 12:30 PM   #28
marce is offline marce  United Kingdom
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Looks nice, I would like to see how small it could be layed out for fun sometime with your permission Neutrality.
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Old 21st November 2012, 01:01 PM   #29
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Looks nice, I would like to see how small it could be layed out for fun sometime with your permission Neutrality.
Fine by me. Besides, there is nothing special in my implementation of this DAC chip so you do not really need my permission.

I could have made it smaller if I wanted to but since I made this for my own use and it fits the cabinet I have chosen for my DAC+headphone amplifier I did not see a need.

Get rid of the pot and move some components closer and it could easily fit on a board less than 50 x 50 mm, maybe even 40 x 40 mm if you use smaller connectors, instead of the current 90 x 50 mm.


Last edited by Neutrality; 21st November 2012 at 01:07 PM.
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Old 21st November 2012, 01:17 PM   #30
marce is offline marce  United Kingdom
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Cheers, always polite to ask IMO, I'll have a play when I get chance.
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