Balanced AES/EBU (SPDIF) input circuit (to DIR9001) - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd May 2010, 11:52 PM   #1
novec is offline novec  Norway
diyAudio Member
 
novec's Avatar
 
Join Date: Aug 2005
Send a message via MSN to novec
Default Balanced AES/EBU (SPDIF) input circuit (to DIR9001)

I'm building a DAC with a DIR9001 receiver, which will be fed balanced AES/EBU from a Lynx AES16 sound card. Problem is, I haven't been able to find a balanced input circuit anywhere. And believe me, I've searched...

Anyone have a balanced input circuit? No transformers, it's already transformer coupled at the sound card.
  Reply With Quote
Old 23rd May 2010, 12:37 AM   #2
RIP
 
Join Date: Oct 2005
Location: Central Florida
Look at the CS8416 datasheet.
  Reply With Quote
Old 23rd May 2010, 02:50 AM   #3
diyAudio Member
 
stokessd's Avatar
 
Join Date: Nov 2002
Location: Grantham, NH
Page 49 of the CS8416 data sheet has what I've seen for the last 20 years, but I only ever have used Crystal receiver chips.

http://www.cirrus.com/en/pubs/proDat.../CS8416_F3.pdf


Sheldon
  Reply With Quote
Old 23rd May 2010, 01:49 PM   #4
novec is offline novec  Norway
diyAudio Member
 
novec's Avatar
 
Join Date: Aug 2005
Send a message via MSN to novec
Thanks a lot, but I'm afraid it doesn't help me much with the DIR9001, as it only has single ended input. I guess it's possible to do an AES -> S/P-DIF conversion first, and then do a single ended input circuit, but I'm sorta hoping there's a better way...
  Reply With Quote
Old 23rd May 2010, 02:01 PM   #5
diyAudio Member
 
Join Date: Oct 2001
Location: .
The two of the usual suspects for this job are the 26LS32 and the SN75176.
  Reply With Quote
Old 23rd May 2010, 02:21 PM   #6
diyAudio Member
 
stormsonic's Avatar
 
Join Date: Aug 2008
@novec
If output od your soundcard is transformer coupled, signal on secondary is already balanced
Better to think about right transformer, how to make correct impedance, signall attenuation, right connector and reflections from DIR9001 input.
Schmitt trigers are nasty

Nice reading here:
LINK 1
LINK 2

Last edited by stormsonic; 23rd May 2010 at 02:36 PM.
  Reply With Quote
Old 23rd May 2010, 02:23 PM   #7
diyAudio Member
 
Algar_emi's Avatar
 
Join Date: Oct 2002
Location: Canada, Qc
AES/EBU balnaced input to Bal/single ended is done with a digital transformer, and is easy to find everywhere. Check Twisted Pear Audio, their SPDIF 4:1 Mux. The schematic shows a good way to implement it.
  Reply With Quote
Old 23rd May 2010, 02:39 PM   #8
ghg is offline ghg  Austria
diyAudio Member
 
ghg's Avatar
 
Join Date: Apr 2002
Location: Vienna
Not that cheap ( ca. $ 50,- ), but perfect:

Neutrik - Audio - AES/EBU Impedance Transformer
__________________
I hate "sounding amps", except these are Marshalls, driven by Eric C. or Jeff B., period.
  Reply With Quote
Old 23rd May 2010, 02:50 PM   #9
RIP
 
Join Date: Oct 2005
Location: Central Florida
Quote:
Originally Posted by novec View Post
Thanks a lot, but I'm afraid it doesn't help me much with the DIR9001, as it only has single ended input. I guess it's possible to do an AES -> S/P-DIF conversion first, and then do a single ended input circuit, but I'm sorta hoping there's a better way...
AES/EBU and SPDIF are virtually the same thing. Use a proper pulse traf and terminate it correctly, and ground one side of the secondary to digital ground, there is no other way AFAIK, except to ground one conductor through a cap.
  Reply With Quote
Old 23rd May 2010, 06:23 PM   #10
diyAudio Member
 
Join Date: Oct 2001
Location: .
Quote:
Originally Posted by Bill Fuss View Post
AES/EBU and SPDIF are virtually the same.
Aside from the different flags and the vastly different voltage levels. At least one of my dacs won't work properly with pro flags and a lot of AES/EBU inputs will not respond to the puny SPDIF levels.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pulse transformers SPDIF/AES-EBU Kurt von Kubik Digital Line Level 64 29th March 2014 11:33 AM
Digital SPDIF-AES/EBU interconnect Nuuk Digital Source 3 11th April 2012 08:22 PM
AES/EBU to SPDIF coax input, how? tubenut Digital Source 48 16th February 2005 08:45 AM
SPDIF to AES/EBU Kari Digital Source 4 22nd February 2004 12:29 AM
DIGI balanced AES/EBU -> SPDIF Coax meta Digital Source 3 26th May 2003 06:51 PM


New To Site? Need Help?

All times are GMT. The time now is 09:02 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2