Just got AD1955 ref board

[schmad]

I just received my AD1955 reference board. Very nice design overall. I'll post some pictures later.

Measurements are pretty great as well with:

THD+N measurements are typically -108.90762 +- .6dB

Non-weighted SNR is right around -117.87 dB, but has been seen as low as -118.59 dB

Non-weighted DNR is between -118dB and -119.28dB

As for the sound...sounds great to me. I'm not going to talk about "transparency" "musicality" or "fullness" as I'm not a big subscriber to those terms.
The numbers pretty much speak for themselves in my book.

[harvardian]

Hi,

Do you how this board does I/V conversion. Does it have balanced outputs? What are the power requirements?

Does it have any power supply on-board ripple filtering?

Sorry about the questions. I can't seem to find any on-line documentation at the Analog site. Do you have any?

Best Regards,

Dale

[schmad]

Do you how this board does I/V conversion. Does it have balanced outputs? What are the power requirements?

It uses AD797s, has balanced and single ended outputs, and requires +- 12V.

Does it have any power supply on-board ripple filtering?

Yep, it has a handful of SMT electrolytics on board.

Sorry about the questions. I can't seem to find any on-line documentation at the Analog site. Do you have any?

It comes with a printout of the schematics and AD1955 docs. You can download the datasheet from Analog's web site:

http://www.analog.com/UploadedFiles/...45AD1955_0.pdf

I don't think the eval board schematics or docs are up there yet.

[harvardian]

Hi Again,

Just hoping that you would post some pics.

Does this have switches to set modes or use a PC connection?
What input receiver does the board use or is one not needed with the 1955?

From you rlast post, I assume there is a 5V regulator on-board.

Thanks again,

Dale

P.S. I have one on order. How long did it take them to ship?

[schmad]

Originally posted by harvardian
[B]

Just hoping that you would post some pics.

OK...here goes:

Does this have switches to set modes or use a PC connection?

The DAC is programmable via SPI, a few of the pins on the DB25 are used for that.

What input receiver does the board use or is one not needed with the 1955?

For the PCM modes, it uses a CS8414. It also has a seperate input for DSD.

From you rlast post, I assume there is a 5V regulator on-board.

Yep, it's in the north slight left of center.

P.S. I have one on order. How long did it take them to ship?

Took a week and a bit to get here.

[harvardian]

A huge thanks!


Best Regards,

Dale

[hbarki]

I also bought one. Still have to build the power supply. What kind of power supply are you using?

[hbarki]

Hi,

I connected the board to +-12V. I use the SPDIF input ang RCA ouput. I did not get any sound. Is there anything I have to do to activate this board?

Thanks