ES9023 / WM8804 S/PDIF "Subbu DAC V3" GB Interest - Page 44 - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 29th November 2012, 10:21 PM   #431
Ryssen is offline Ryssen  Sweden
diyAudio Member
 
Ryssen's Avatar
 
Join Date: Dec 2003
Location: Sweden--> Here
Ok so theres no C12 and a tantal is to be used as C8,but will there be a quality "boost" in using the other tantal instead of the cheramic ones?
__________________
Regards Åke
  Reply With Quote
Old 30th November 2012, 03:29 AM   #432
pchw is offline pchw  United States
diyAudio Member
 
Join Date: Apr 2006
Location: Fremont, California
Assuming you referred to v2.6, to my ears, I couldn't hear any difference from the C8 change. Correction to C32 orientation had a much bigger impact. C12 is soldered at the back.

In the build guide/BOM sent by Subbu, both C8 and C12 are 1uF, not 0.001uF (assuming you did mean 0,001 as 0.001uF). Both spec as C1210 package which is right for the pads. In an earlier BOM, C8 was 0.01uF with C0805 package.
__________________
- Fred -
  Reply With Quote
Old 30th November 2012, 09:53 AM   #433
Ryssen is offline Ryssen  Sweden
diyAudio Member
 
Ryssen's Avatar
 
Join Date: Dec 2003
Location: Sweden--> Here
What about C29,C26,C22 and C19 I soldered the ceramic caps and later found the tantals,any sound diffrence between the two?
__________________
Regards Åke
  Reply With Quote
Old 30th November 2012, 10:41 AM   #434
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
Don't have the schematic where I am now but MIC5205 should definitely not have ceramic caps at the outputs. They will oscillate easily with ceramic caps at their outputs ! Tantals should be used at the outputs and also for decouping the XO. At the inputs so the +5V side there is not a problem so you can use ceramic caps at the inputs of MIC5205.

I see the trouble of info getting lost that was posted weeks/months ago....A central page with technical info would be a solution.
__________________
It's only audio. Official member of the Norske Brillegeit Gang.
  Reply With Quote
Old 30th November 2012, 03:53 PM   #435
tubo is offline tubo  Philippines
diyAudio Member
 
Join Date: Apr 2007
Location: Mundelein, Illinois
HI GUYS, NEED HELP..

I'M CURRENTLY ON THE GROUP BUY FOR THE SUBBU V3 AND ALSO THE IAN I2S SPDIF FIFO.

I NEED HELP ON HOW TO INTEGRATE THE SPDIF FIFO WITH I2S OUPUT (SD, WS, SCK) TO THE SUBBU BOARD. THE FIFO I2S OUT HAS 3 WIRES FOR (SD, WS, SCK).

WHERE DOES THE WIRES FROM 12S FIFO OUT CONNECTS TO THE SUBBU DAC?

THANKS
  Reply With Quote
Old 30th November 2012, 04:39 PM   #436
syklab is offline syklab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Location: Hong Kong
Quote:
Originally Posted by tubo View Post
HI GUYS, NEED HELP..

I'M CURRENTLY ON THE GROUP BUY FOR THE SUBBU V3 AND ALSO THE IAN I2S SPDIF FIFO.

I NEED HELP ON HOW TO INTEGRATE THE SPDIF FIFO WITH I2S OUPUT (SD, WS, SCK) TO THE SUBBU BOARD. THE FIFO I2S OUT HAS 3 WIRES FOR (SD, WS, SCK).

WHERE DOES THE WIRES FROM 12S FIFO OUT CONNECTS TO THE SUBBU DAC?

THANKS
If the I2S connection on the V3.0 is the same as the V2.6 then you can try these:
SD -> R9 (DATA)
WS ->R7 (BCLK)
SCK ->R8 (LRCK)
  Reply With Quote
Old 30th November 2012, 04:46 PM   #437
syklab is offline syklab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Location: Hong Kong
Clip from the MIC5205 datasheet for recommendation on output capacitor:

Output Capacitor
An output capacitor is required between OUT and GND to prevent oscillation. The minimum size of the output capacitor is dependent upon whether a reference bypass capacitor is used. 1.0μF minimum is recommended when CBYP is not used (see Figure 2). 2.2μF minimum is recommended when CBYP is 470pF (see Figure 1). Larger values improve the regulator’s transient response. The output capacitor value may be increased without limit.
The output capacitor should have an ESR (effective series resistance) of about 5Ω or less and a resonant frequency above 1MHz. Ultra-low-ESR capacitors can cause a low amplitude oscillation on the output and/or underdamped transient response. Most tantalum or aluminum electrolytic capacitors are adequate; film types will work, but are more expensive. Since many aluminum electrolytics have electrolytes that freeze at about –30°C, solid tantalums are recommended for operation below –25°C.
  Reply With Quote
Old 30th November 2012, 05:04 PM   #438
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
I guess using 4.7 uF tants is OK then
__________________
It's only audio. Official member of the Norske Brillegeit Gang.
  Reply With Quote
Old 30th November 2012, 05:09 PM   #439
tubo is offline tubo  Philippines
diyAudio Member
 
Join Date: Apr 2007
Location: Mundelein, Illinois
THANKS SO MUCH SKYLAB... IT WAS VERY HELPFUL..
  Reply With Quote
Old 30th November 2012, 05:49 PM   #440
mickie is offline mickie  Germany
diyAudio Member
 
Join Date: Feb 2006
Location: Berlin
Hi,
..can anyone estimate how low actually one could go regarding ESR with the MIC5205 (.."about 5R or less...")?
There are Tantalum-caps with an ESR as low as 0,1 R....

TCJB475M025R0150 - AVX - CAPACITOR, 4.7UF, 20%, 25V, 1210 | Farnell Deutschland

Mickie
  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
Case for "ES9023 / WM8804 S/PDIF DAC Group Buy" rvrazvan Digital Source 3 Yesterday 08:37 AM
ES9023 / WM8804 S/PDIF DAC Group Buy unixdeveloper Group Buys 680 24th January 2014 04:05 PM
Power Supply PCB for ES9023 / WM8804 S/PDIF DAC Group Buy unixdeveloper Group Buys 145 29th July 2013 12:55 PM
WTB ES9023 DAC PCB by Subbu & Jean-Paul Reima Swap Meet 5 18th December 2012 07:39 PM
ES9023 / WM8804 S/PDIF DAC Parts GB EU Only korben69 Group Buys 187 10th October 2012 11:25 AM


New To Site? Need Help?

All times are GMT. The time now is 09:21 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