ESS Sabre Reference DAC (8-channel)

[nagaesan]

ES9008S eva-board I/V stage

This photo is ES9008S eva-board I/V stage close up.
ESS choice Analog Devices AD797.

 

[Russ White]

Re: Why McIntosh use CS8416?

McIntosh MCD500 has 192kHz24bit digital input RCA terminal.
I checked this Digital Interface Reciever IC, it was CS8416.
I wonder why McIntosh uses CS8416 conventional PLL DIR-IC, because ES9008S has very nice non PLL / Time stump based DIR circuit.

Do you know who it is?

My guess is they used it for convenience, since they needed to multiplex multiple SPDIF inputs.

The ES9008 has no provision to multiplex SPDIF.

Cheers!
Russ

 

[nagaesan]

I removed ES9008S eva-board I/V stage AD797

I changed I/V OP-Amp.

 

[nagaesan]

AD825 on ES9008S eva-board

AD797 to AD825
I think AD797 is a nice low noise good performance OP-Amp.
But I want more faster OP-Amp for I/V stage.
I changed I/V OP-Amp, AD797 to AD825.
AD825 is high slew rate and short settling time than AD797.

 

[BrianL]

I'm confused. What is the complexity of multiplexing and SPDIF bit stream? Unless, perhaps, you're worried about transients generated if you merely switched them with a digital mux.

 

[Russ White]

I'm confused. What is the complexity of multiplexing and SPDIF bit stream? Unless, perhaps, you're worried about transients generated if you merely switched them with a digital mux.

It's not that its particularly complex, but by using the CS8416 you can keep the ES9908 in one mode, namely PCM/DSD. This simplifies things quite a lot.

Cheers!
Russ

 

[BrianDonegan]

Re: McIntosh MCD 500 inside view

This is McIntosh MCD 500 inside view.

A few questions:

What's under the little shield on the circuit board (assuming microcontroller)?

Where is the ESS in the physical layout?

Can you make out any markings on the back of the Toslink connector (inside the case)? I am wondering what they are using.

 

[nagaesan]

MCD500 shield on the circuit board

Hello Brian,

>What's under the little shield on the circuit board (assuming microcontroller)?

This is clock unit.

 

[nagaesan]

ES9008S on MCD500 D/A board

>Where is the ESS in the physical layout?

There is it behind a clock box.

 

[Russ White]

nagaesan,

Are you able to see how they derive AVCC(3.3V) for the ES9008? Did they use the same approach as the demo board?

Thanks for the info!

Cheers!
Russ

 

[nagaesan]

>Toslink connector (inside the case)? I am wondering what they are using.

This is Transmitter.
I do not know this OPT Device is 4times or 2times speed.

 

[nagaesan]

TOS-Link reciever device of MCD500

Recieving OPT Device is this.
I do not know this is 4times speed(DVD-Audio 192kHz is OK)
or 2times speed(DVD-Video 96kHz)

But I already checked it, MCD500 can recieving 192kHz 24bit.
How I checked it, that I build up Audio PC, installed RME HDSP9632 sound-card.
RME HDSP9632 support 192kHz24bit
And I used "Adobe Audition" sound editting software.

http://www.teddigital.com/prx06.htm

 

[nagaesan]

OPA627 on ES9008S eva-board

Today I changed I/V OP-Amp on ES9008S eva-board AD797 to OPA627.

I think AD797 is a nice low noise good performance OP-Amp.
But I want more faster OP-Amp for I/V stage.
I changed I/V OP-Amp, AD797 to OPA627.
OPA627 is high slew rate and short settling time than AD797.

 

[nagaesan]

AD797 or AD825 or OPA627

I have 3 ES9008S eva-board.

No1. board is not modify, this I/V stage is AD797.
And I put this eva-board in a silver color chasis.

No2.board is modified I/V stage, AD825.
And I put this eva-board in a black color chasis.

No3.board is also modified I/V stage, OPA627.
This eva-board is naked.

 

[nagaesan]

Audition today 3eva-borad, different I/V stage

Today I went High-end audio shop "IKEON" Tokyo JAPAN, for hearing 3eva-board sound.

 

[nagaesan]

AVCC BUFFER

http://www.esstech.com/PDF/Sabre_8_2Channel_64PIN_V3_SCH.pdf

This pdf.file shows AVCC BUFFER schematic.
ESS was choice AD797.

 

[EUVL]

nagaesan mo DAC wa totemo kirei desu ne !!!!

Patrick

 

[kevino]

ES9018 Sabre 32

Hi,

there's a company called ismosys.com that has the chips and the
evaluation kits for sale:

http://ecommerce.ismosys.com/ordering/index.php?manufacturers_id=34

Can't tell whether they are 'actually' available.
The kits are quite expensive too.

 

[BrianDonegan]

Re: ES9018 Sabre 32

Hi,

there's a company called ismosys.com that has the chips and the
evaluation kits for sale:

http://ecommerce.ismosys.com/ordering/index.php?manufacturers_id=34

Can't tell whether they are 'actually' available.
The kits are quite expensive too.

The ES9018 are not yet in production.

 

[HaLo6]

Brian, are you guys going to use (or can you use) the original Buffalo board for the newer 9018 or is it back to drawing boards? I am trying to weigh waiting for the 9018 or just buying the 9008, (can they really be THAT much different)