Low cost ES9018 Dac - Builders Thread - diyAudio
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Old 19th June 2014, 08:44 PM   #1
freeman is online now freeman  United States
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Default Low cost ES9018 Dac - Builders Thread

Hi all,
Please feel free to use this thread for everything related to your ES9018K2M dac build. Ask questions, seek advice, and share tips, techniques, and photos.
Regards.
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Old 19th June 2014, 09:15 PM   #2
freeman is online now freeman  United States
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Started soldering today. My plan is to leave off mcu etc. and use dac in default mode at first. everything in lower right will not be populated. Im using the SOIC opamps and the ADP151 regs. My only question so far is what to do with the ADDR pads. Let me know if you see anything amiss.
Thanks. Cheers.
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Old 20th June 2014, 05:50 AM   #3
SDF is offline SDF  France
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ADDR is the chip address. In stand alone, without MCU, we don't care about his value.
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Old 20th June 2014, 08:04 AM   #4
danzup is offline danzup  Romania
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I will use separate 5V power supply and not derived from V+ .
A superreg that will provide +5V and will not solder REG2 .
Also the transformer will have separate secondary at about 10V ac with separate diode and capacitors for this .
And a silver mica capacitor of 1nF in position of C12.
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Old 20th June 2014, 09:35 AM   #5
syklab is offline syklab  Hong Kong
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Quote:
Originally Posted by danzup View Post
I will use separate 5V power supply and not derived from V+ .
A superreg that will provide +5V and will not solder REG2 .
Also the transformer will have separate secondary at about 10V ac with separate diode and capacitors for this .
And a silver mica capacitor of 1nF in position of C12.
Hi,
Do you mean to leave out REG2 and use separate superreg with separate winding from the transformer for feeding the DC-5V (circule in red) ?

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Old 22nd June 2014, 08:50 AM   #6
Ryssen is offline Ryssen  Sweden
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How much current does the 5v line need?
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Old 22nd June 2014, 10:24 AM   #7
SDF is offline SDF  France
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400mA
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Old 22nd June 2014, 10:31 AM   #8
Ryssen is offline Ryssen  Sweden
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Ok,to much to use a shuntreg then..?
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Old 22nd June 2014, 11:53 AM   #9
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Quote:
Originally Posted by SDF View Post
400mA
Where do you get this figure from? Seems excessively high.
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Old 22nd June 2014, 12:38 PM   #10
SDF is offline SDF  France
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The 5V is about 100mA, and the 3.3V, 300mA....maybe excessively high but not much excessive!
Some shuntreg can provide 400mA...but the really critical voltage is buffered in the circuit by the lm4562 in follower configuration!
The schematic provide by Syllabe show a smart implementation of the DAC.
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