[frex]

Hello,


Does anyone would be interested by an high-end analog to digital converter ?
For my own use, i develop a new ADC .It's main use is a high performance measurements tool, for testing my DIY audio projects.
It's main features are :

Cirrus Logic CS5381KZZ 24 bits 192kHz flagship ADC
Fully differential and single-ended switchable analog inputs.
AC and DC coupling input switchable.
48, 96 and 192kHz on the fly selectable sampling rate.
Optical (toslink) and BNC SPDIF digital outputs.
Very small from factor (120x70x20mm)
Zero calibration allow all offset cancellation.
+/-10V FS input sensitivity.
Standard SMD or TentLab Master clock oscillator
Need +/-15Vdc power supply (SSR01/02 or other low noise PS. Allow 4 wires with sense connexions)
Use MAX3000 PLD functions controlling (no uC)
Allow low-cost or Scientific-Conversion High-end SPDIF digital transformer.

This is my 2nd ADC design (the first use the AK5394 ADC).
Here the PCB design use 4 layers with massive ground plane and very clean signal path routing
Now, the schematics and the PCB design is done, but not already sent to the PCB manufacturer.
I verify again and each one before to order it.

If some DIYers are interested by this project, i can post more details about it.

Frex

 

[frex]

Below, You can see what it should look like.

Frex.

 

[sergery]

Looks like it will be a beast! I would certainly like to know more.

 

[LFF]

I would like to have one but I'm no DIY whiz.

Might I also suggest a USB output to capture recordings straight into a PC.

 

[diditmyself]

Will it's measured performance beat eg E-mu 1212M?

 

[frex]

Hello,

After somebody talked to about this thread, i move it to the DIYaudio forum.
It will be probably better located.
Anyone would be interested by the project will follow it on this new location.
More info (schematics and pcb design..) will be posted this week.
To see you soon.
The new thread location is HERE.

PLEASE, NOW POST ONLY TO THE NEW THREAD !



Frex

Answer to:

LFF
----
Unfortunatly USB is not suitable for this type of device.It doesn't support high sampling rate (or it need many software/hardware design).

diditmyself
-------------
The prototype is not yet finished, then i don't have done measurement.
EMU1212M use an AKM5394A ADC chip. I know it, my first ADC design use one.
I try now the CS5381 because it's the top of class ADC of Cirrus-Logic, with overall performance very near of the AK5394.
A big difference with a soudcard, the ADC is far a very high EMI noise generator, and the digital link between the PC and the ADC unit is fully isolated.
I build also this unit for more convenient use.As the difference between a PC-based oscilloscope and a "real" oscilloscope !

Of course, I hope to make the most of this IC.

 

[GeorgeW]

Hi, that A to D looks awesome.  We have a studio, and could use mulitpe s/pdif input A to D's. Have you worked more on them?  BTW, thee drawings looks a bit like the ESI u24 but with much better, newer chips.  Is there a kit yet?

 

[Grover49]

I am interested in more info. I am looking to build a 12 channel USB interface using TI PCM1850 I am a complete amateur here so a lot of help will be needed.