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DAC-END R (ES9018) full assembled board

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A

audiodesign

Banned
Joined 2005
outptu stage

I am making some test with different output stage.

I have found that it is possible convert the output of the ES9018 in un-balanced so we will have 8 DAC in parallel with an outptu impedance of about 100ohm.

The DAC chip with balanced reject common-mode interference coming from power supply but here we are using the top of regulator, a hi-end linear regulator followed by an ultra fast shunt.

The balanced outputs need a differential stage to get an un-balanced signal so many component on the signal path.

I have realead a new frmware version with the possibility to change the output configuration and get an un-balanced signal on output.

You can connect directly the DAC output to your amplifier with a single capacitor or add a normal single ended stage like my DAC End with AD1865.

Here the new firmware and the manual of the remote command.

It is possible update the firmware with the cheap Pickit2 or any other clone.
 

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danny_66

danny_66

Member
Joined 2005
I have found that it is possible convert the output of the ES9018 in un-balanced
Click to expand...

Hello Andrea,

Can you explain this a little more ?
Does this mean that in this new mode there is only SE output from the ES9018?
Is I/V conversion still needed ?
Does the ES9018 run in voltage out mode? how much voltage ?

Thanks for adding new features !
Regards,
Danny
 
L

linuxfan

Member
Joined 2007
audiodesign said:
I have realeased a new frmware version with the possibility to change the output configuration and get an un-balanced signal on output.
Click to expand...
I was interested to try "poor-man's" unbalanced by using one phase of the DAC output -
by connecting to DAC+ and A_GROUND ...
As I understand it, the output impedance would remain the usual 195R (4x DAC ouputs 780R in parallel)

So Andrea you're saying that the DAC can be configured to have true unbalanced outputs?
If so, is the correct connection DAC+ and A_GROUND, or DAC+ and DAC- ?
 
quanghao

quanghao

Member
Joined 2009
quanghao.com/
Shipping Notice

Hello, today I've sent some goods and you can track the following tracking numbers:
- Daniel: 802609632489
- Luizl: 802609632743
- Randytsuch: 802609632732
- Simon Polz: 802609632456
- Halook: 802609632467
- Misterwolf: 802609632478

I am currently waiting for test transformer and the chassis, the more you please allow me a few more days.
You pay 50% less for goods, please return to me.
Thank you!
 
Last edited:
R

randytsuch

Member
Joined 2003
randytsuch-audio.blogspot.com/2005/10/my-system.html
quanghao said:
Hello, today I've sent some goods and you can track the following tracking numbers:
- Daniel: 802609632489
- Luizl: 802609632743
- Randytsuch: 802609632732
- Simon Polz: 802609632456
- Halook: 802609632467
- Misterwolf: 802609632478

I am currently waiting for test transformer and the chassis, the more you please allow me a few more days.
You pay 50% less for goods, please return to me.
Thank you!
Click to expand...

Fedex says my package is due Tuesday :)

Need to start working on the rest of the box to get things ready.

Randy
 
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