Anybody using the new ESS Vout DAC (ES9022)?

[EUVL]

I use 3.3V low noise regulators after the battery.


Patrick

[samoloko]

thank you for advice

I guess that for ES9023 setup your batteries PSU supply at least 5 pcs low noise regulators
would you please recommend 3.3V and 5V low noise regulator

[EUVL]

Just google.


Patrick

[simonov]

Just for the trial this is what I'm about to build. More info and manufacturing files on my blog

DIY AUDIO BLOG : My DIY Audio Blog

[EUVL]

There is no reason to use extra opamps at the output IMHO.
The ES9022 already have opamps inside.
If anything you should use the Joachim Gerhard buffer.


My 2 cents,
Patrick

[syklab]

Hi Patrick,
Sorry for my dumb question, is the buffer necessary if the ES9022/23 is connected to a buffer pre-amp like the B1/DCB1 ? Is the Joachim Gerhard buffer PCB available?

Thanks

[samoloko]

as a general rule short audio chain Is better

two buffers can only degrade sound

[EUVL]

What normally follow the 9022 are cables and then attenuator (volume control).
Unless you have long capacitive cables, there is no reason to have an additional buffer.

The B1 or DCB1 is actually the good old source follower, i.e. a buffer.
So why would you want to add even more ??

The reason for the Joachim Gerhard buffer is that it has additional filter before that.
The Zout of the filter is not exactly low, so a buffer can be justified here.
It is actually a more advanced, cascoded Source Follower compared to the B1.

And even if I ever need a buffer, I would not want to use an opamp in unity gain.
You might as well use a LSK389 in SOIC8, and wire it as a source follower.
We shall release a new adaptor PCB (SOIC to DIP8) specific for that purpose this summer / autumn.

As to the Joachim Gerhard filter, we can release it as soon as Joachim says yes.
Our only prototype has been sitting in his desk for a couple of weeks.
Maybe you could help us to persuade him to give it some priority.




Patrick

[simonov]

Originally Posted by EUVL

There is no reason to use extra opamps at the output IMHO.
The ES9022 already have opamps inside.
If anything you should use the Joachim Gerhard buffer.


My 2 cents,
Patrick

I don't trust anything that is powered by 3.6V Besides the PCB has direct outputs as well. May I see a link to this "Joachim Gerhard buffer"?

Regards, Venci.

[EUVL]

The truth is not in speculations on paper, but experience in real.
There are many who have listened to the 9022 themselves, including Joachim Gerhard.

At the top of this thread there is a search function, which will lead you to the many posts by Joachim here.
Those include the development steps of his filter.


Patrick