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Old 21st August 2014, 12:12 PM   #1
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Default My DIY ES9018K2M DAC

Just successfully diy an es9018k2m dac....

DAC working in power on default I2S and voltage out mode, powered by single 5V with three 3.3v LDO for digital, analog and 50MHz XO.

Simple and good sound.
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File Type: jpg k2m2.jpg (86.0 KB, 285 views)

Last edited by cctv628; 21st August 2014 at 12:14 PM.
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Old 21st August 2014, 01:27 PM   #2
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Default Bottom side of this proto board

one more photo
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Old 21st August 2014, 02:20 PM   #3
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Quote:
Originally Posted by cctv628 View Post
Just successfully diy an es9018k2m dac....

DAC working in power on default I2S and voltage out mode, powered by single 5V with three 3.3v LDO for digital, analog and 50MHz XO.

Simple and good sound.
where did you purchase the chip ?
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Old 21st August 2014, 03:34 PM   #4
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I bought it from ESS UK distributor.
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Old 24th August 2014, 01:32 PM   #5
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Please show the schematics

Thanks
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Old 27th August 2014, 08:21 AM   #6
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Can not post the ES9018K2M schematic due to ESS NDA (non disclosure agreement).
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Old 27th August 2014, 08:32 AM   #7
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I understand.

But does it work OK? any problems getting it going, or interfacing to it?
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Old 27th August 2014, 12:04 PM   #8
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Only partially works:

I2S - plays DXD 352.8K, 44.1K -192K without problem with my XMOS USB I2S converter.

DSD - not sure, my XMOS converter can not play DSD.

SPDIF & optical - still figuring out a working circuit.

The grounding of this proto board is not good enough, and the Mute function seems not working. Some noise comes out from the speakers when volume knob turns beyond 12'o clock.

The ES9018K2M full data sheet looks like a programming reference guide, contains very little hardware design reference info.


ps. Not a native English speaker, sorry for my bad English.
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Old 27th August 2014, 12:25 PM   #9
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Thank you - your English is good, I understand perfectly.

I built a board up with ES9018 (the 8-channel one).

I found some output noise with voltage-output mode, too. In place of the opamp-driven reconstruction filter, I used a cap directly across the output phases, and this improved it very much.

This method is Joe Rasmussen's:

Oppo`s BDP105 - discussions, upgrading, mods...

I think it should be 100nF - 110nF for the ES9018K2M, and Panasonic ECHU was the type I have tried. SMD film caps are best, since much of the effect is due to reducing ultrasonic and switching noise, and keeping this from getting to the analogue sections.
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