X2Y caps opinions needed - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, 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 1st June 2004, 06:23 PM   #1
diyAudio Member
 
Join Date: Jan 2003
Location: Asia
Thumbs up X2Y caps opinions needed

Hi,

It seems that the X2Y caps are the perfect solution for IC power supply decoupling.

From the tech spec, I am pretty sure a single X2Y cap will out perform any other caps for this function.

However, I am not sure how does the X2Y cap perform against some of the best parallel cap combination, for examples:

http://www.diyaudio.com/forums/show...44407#post44407

What's your take?

  Reply With Quote
Old 1st June 2004, 06:37 PM   #2
tiroth is offline tiroth  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
What is "X2Y cap"?
  Reply With Quote
Old 1st June 2004, 07:00 PM   #3
diyAudio Member
 
Join Date: Jan 2003
Location: Asia
Check it out here:

http://www.x2y.com/
Attached Images
File Type: gif graph1.gif (18.3 KB, 141 views)
  Reply With Quote
Old 1st June 2004, 07:01 PM   #4
diyAudio Member
 
Join Date: Jan 2003
Location: Asia
more
Attached Images
File Type: jpg products.jpg (20.1 KB, 136 views)
  Reply With Quote
Old 1st June 2004, 07:04 PM   #5
diyAudio Member
 
Join Date: Jan 2003
Location: Asia
more more
Attached Images
File Type: gif graph2.gif (26.4 KB, 134 views)
  Reply With Quote
Old 2nd June 2004, 12:48 PM   #6
tiroth is offline tiroth  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
OK, I had a chance to read the literature. Although the X2Y caps seem to be most dramatically better in terms of radiated noise, they may also offer improvements in terms of decoupling. It looks like a large (~1uF) X2Y in the 1812 package retains the HF performance of a 100nF 0603 ceramic while having most if not all of the advantages of the larger cap.

I didn't see any tests of 1uF X2Y versus 1uF//100nF//10nF 0805 or 0612 ceramic, which would have been nice. My concern is that the difference is impressive, but not so dramatic that it is totally obvious to me that these will be significantly better.

You'll have to design the boards specifically for these caps due to the shield electrodes.
  Reply With Quote
Old 2nd June 2004, 12:51 PM   #7
tiroth is offline tiroth  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
Note there is a spice model available too for those who might want to investigate.
Attached Images
File Type: jpg x2y.jpg (39.8 KB, 97 views)
  Reply With Quote
Old 2nd June 2004, 04:11 PM   #8
diyAudio Member
 
Join Date: Jan 2003
Location: Asia
Quote:
most dramatically better in terms of radiated noise
What is the significance of this?
  Reply With Quote
Old 2nd June 2004, 04:23 PM   #9
tiroth is offline tiroth  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
It is very hard to say in the context of DIY. In general we are not concerned with acheiving regulatory-approval emissions levels, but that doesn't mean we are unconcerned about radiated noise corrupting our signal integrity or analog circuitry. That said, I think at the frequencies of interest in DIY DACs, decoupling is more important than controlling radiation by a significant factor. (provided appropriate rise time circuitry is used!)

I would like to see someone like Francios comment. AFAIK he is the only one to measure *and document* various digital decoupling schemes are our frequencies of interest.
  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
opinions Requested on Xover caps Renron Parts 2 20th February 2007 06:55 AM
ASAP opinions needed...pls? whiteSE Solid State 3 29th October 2005 10:03 PM
JBL BassPro opinions needed KECl88 Car Audio 0 17th October 2004 12:07 PM
Opinions on Elna RSH caps? Nisbeth Parts 3 21st June 2004 08:14 AM
Subwoofer opinions needed! chr Subwoofers 4 17th November 2002 09:44 PM


New To Site? Need Help?

All times are GMT. The time now is 09:22 PM.


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