USB to I2S 384Khz - DSD Converter

[qusp]

Hi,
How would you compare the NVE with the TI ISO7240 or AD Adum3440?

with their datasheets =)

that and the fact that those 2 were chosen by Ian as the best options for the i2s fifo buffer isolation board proto with good results.

 

[necplusultra]

Does anybody know where to source an isolator adapter pcb?

If not, would a group buy be feasible?

It seems to be a simple circuit even to include a LDO regulator circuit for the output portion.


regards.

 

[syklab]

Interested in a few as well.

 

[mavsan]

Hi,
I added my name to the GB list.
Thanks

 

[Boomer2]

+1

Thanks

 

[neskor]

I added my name to the GB list.
Thanks

 

[dsdjoy]

with their datasheets =)

that and the fact that those 2 were chosen by Ian as the best options for the i2s fifo buffer isolation board proto with good results.

Here is a good comparison of different isolators:
Which Digital Isolators for I2S? …or NOT H i F i D U I N O

 

[2A3SET]

BCK from XO directly

Just a quick test, SCK/MCLK from XO directly (PIN 43/44 tied together) sounds better than from the standard CPLD output. Anyone else tried?

Regards

 

[qusp]

Here is a good comparison of different isolators:
Which Digital Isolators for I2S? …or NOT H i F i D U I N O

thanks. So those 2 I mentioned were the best specced back then too

 

[2A3SET]

Reclocking the BCK

After improvement of getting MCLK from XO instead of using standard PIN 6, I tried reclocking the BCK with same MCLK and the improvement is very positive. Right now I tied PIN43/44 on CPLD together, fed MCLK to reclocker and DAC with 2K resistor. The reclocker is 74AUC1G74 D-type flip-flop at 2.5V (power pull from 3.3V with 330ohm in series). Left side is PCM5102 DAC.

 

[shoom]

Hi 2A3SET
Nice work and thanks for sharing.
How have you powered the USB/I2S board?
I may be wrong but it looks from here like you have dedicated PSU for the XO’s.
That’s something that I may try when my board arrives.

 

[2A3SET]

Yes, separate Salas shunt for the board, XO and reclocker.

 

[bigpandahk]

Hi Amanero,

The list for GB disappeared !! Any update on the GB II?

https://docs.google.com/spreadsheet/...wYS1EcXc#gid=0

 

[dsdjoy]

Link was truncated in previous posts.
The GB list is still there:

https://docs.google.com/spreadsheet/ccc?key=0AmX4TyHWgSmNdE5laDJQNlA3UVBYaWlrczJwYS1EcXc#gid=0

Hi Amanero,

The list for GB disappeared !! Any update on the GB II?

https://docs.google.com/spreadsheet/...wYS1EcXc#gid=0

 

[dsdjoy]

Hurray...amanero website says they are "In Stock".

When does the group buy 2 start ?

 

[amanero]

Hello, i received finally the boards. I m programming them and testing. I would like to open the GB next monday.

Thanks,
Domenico

 

[gmant123]

New batch

Hi Domenico:

There is about 150 converters on the waitlist, how many can you deliver this time?

Regards.

Alberto.

 

[amanero]

150 it's ok for delivery.

There is UPS option too for fast delivery 1/2 business days in Europe and 2/3 business days world wide.

 

[gmant123]

Thank you for reply.

The price is the same as the previous group buy or improved by this quantity? (150 +)

 

[amanero]

i' msorry gmant123 but below 39 euro is not possible :-(