DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 221 - 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 27th October 2012, 09:48 PM   #2201
ch33ta is offline ch33ta  Croatia
diyAudio Member
 
ch33ta's Avatar
 
Join Date: Jun 2006
Location: Croatia
Send a message via MSN to ch33ta Send a message via Yahoo to ch33ta
Actually you don't need a schematic, just stick in something like this;
10pcs 11 2896MHz Passive Crystal Oscillator Timer SMD 5x7 5 7 | eBay
Connect it to a PSU and output to the OMCK pin.
The quality of the oscillator is not that important, it only acts as a "backup" in case PLL loses lock.
__________________
Nothing to see here...
  Reply With Quote
Old 27th October 2012, 09:55 PM   #2202
ch33ta is offline ch33ta  Croatia
diyAudio Member
 
ch33ta's Avatar
 
Join Date: Jun 2006
Location: Croatia
Send a message via MSN to ch33ta Send a message via Yahoo to ch33ta
Quote:
Originally Posted by qusp View Post
erm, what possesses a sane human being to deliberately verify if the opamp works backwards
To boldly go where no sane man has gone before

Sorry, I couldn't help myself
__________________
Nothing to see here...
  Reply With Quote
Old 28th October 2012, 06:12 PM   #2203
diyAudio Member
 
Join Date: Mar 2012
The oscillator has three connections:

INPUT
OUTPUT
GND

So INPUT goes to digital +3.3V,
GND is self explanatory
OUTPUT goes to OMCK (pin 25 on CS8416)? Now pin 25 is connected to GND and via R4 (47K) to SDOUT. Should that be removed? And if yes, what should and what should not be removed?
  Reply With Quote
Old 28th October 2012, 07:05 PM   #2204
ch33ta is offline ch33ta  Croatia
diyAudio Member
 
ch33ta's Avatar
 
Join Date: Jun 2006
Location: Croatia
Send a message via MSN to ch33ta Send a message via Yahoo to ch33ta
Ooooops, gave you the wrong link - that's a passive crystal...

You need something like this;
10pcs 11 2896MHz 11 2896M Active Crystal Oscillator Timer SMD 5x7 5 7 | eBay
or
5 x 11 2896MHz Crystal OSC 8 Pin Format TTL Enable Option DIY Word Clock | eBay

You have; Vdd, GND, Output - all of these are self explanatory...
OMCK is connected to GND, but SDOUT is connected to GND through a 47k resistor - so no need to touch SDOUT or that resistor - the DAC schematic is drawn a little strange...
Just unsolder the OMCK pin...
__________________
Nothing to see here...

Last edited by ch33ta; 28th October 2012 at 07:08 PM.
  Reply With Quote
Old 28th October 2012, 09:21 PM   #2205
diyAudio Member
 
Join Date: Mar 2012
Hmmm.... that 5 x 112896 Crystal OSC etc.... is a 5V version. As far as I know, the CS8416 works on 3,3 V.

So how should I connect this? There is no 5V on the board, only 9V or + / - 15V
  Reply With Quote
Old 28th October 2012, 09:28 PM   #2206
ch33ta is offline ch33ta  Croatia
diyAudio Member
 
ch33ta's Avatar
 
Join Date: Jun 2006
Location: Croatia
Send a message via MSN to ch33ta Send a message via Yahoo to ch33ta
Well, I put a separate 5V regulator together with the oscillator, but you could steal 5V supply from the regulator that supplies the AK4396 (AMS1117) - not the best solution but it will work...
__________________
Nothing to see here...
  Reply With Quote
Old 28th October 2012, 09:35 PM   #2207
diyAudio Member
 
Join Date: Mar 2012
OK, thanks. The biggest problem will be to find a soldering tip that can desolder the tiny pins of the SMD chip.

So, after connecting all this, the output of the DAC chip will be muted, if no S/P DIF signal is present? And once the CD player starts to submit the digital stream, it will automatically start to decode and play music?


Haik
  Reply With Quote
Old 28th October 2012, 09:46 PM   #2208
ch33ta is offline ch33ta  Croatia
diyAudio Member
 
ch33ta's Avatar
 
Join Date: Jun 2006
Location: Croatia
Send a message via MSN to ch33ta Send a message via Yahoo to ch33ta
I used a 2mm wide soldering tip (not that small) and a scalpel with really thin tip to push the pin up...
You can heat up the surrounding pins, just make sure you pull up only the OMCK pin...

The output of the DAC won't be muted, it will be active, however you won't get that annoying hiss when no SPDIF signal is present, it will be silent... And that's all you need...
__________________
Nothing to see here...
  Reply With Quote
Old 2nd November 2012, 02:49 PM   #2209
diyAudio Member
 
Join Date: Mar 2012
OK, I ordered a tiny (0.5 mm) soldering tip from Farnell (number 418572). It was the smallest which will fit my soldering iron. Let's see if I can lift off the pin.

Good for me, that one DAC was blown (the 3,3V regulator on the digital side went broken due to a power spike on the mains power). So now have a "half working" DAC unit, which I can break and use the parts.....
  Reply With Quote
Old 3rd November 2012, 07:27 PM   #2210
diyAudio Member
 
Join Date: Mar 2012
For those who are interested, I post a screen shot of a scope.

The signal you see here is the 11.28960 MHz signal generator, which is sold on e-bay.

Not a perfect sinus, but probably it is not a problem. Next week I am going to play with the SMD IC's.
Attached Images
File Type: jpg DSC05730.jpg (833.2 KB, 445 views)
  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
AK4393 burn... CIMONE Digital Line Level 5 24th June 2011 02:12 PM
AK4393 to CS4223? CIMONE Digital Line Level 0 13th December 2009 02:30 PM
AK4393 Serial Configuration Problem Aoxomox Digital Line Level 0 20th March 2009 05:25 PM
AK4393, CS8413 and CS8414 Data Sheets Blue_Max Digital Source 0 23rd December 2004 01:37 PM


New To Site? Need Help?

All times are GMT. The time now is 09:26 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