AD1865 schematic - Page 5 - 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 10th April 2013, 12:12 PM   #41
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
I presume the 24 pin device is the AD1865, if so you may want to check the Iout pins 4 and 21 they seem to be connected directly to GND, also the SJ pins.
The resistor and caps hanging off these lines also do not connect to anything apart from each other.
Is it based on the schematcis in post 4 or 5?

Last edited by marce; 10th April 2013 at 12:16 PM.
  Reply With Quote
Old 10th April 2013, 08:59 PM   #42
diyAudio Member
 
skouliki's Avatar
 
Join Date: Aug 2010
Location: Athens
Yes the big IC is AD1865. Im using the Iout schematic for both 24 bit and 24bit/192khz boards (24bit/192 khz is Vout on pavouks site).

I think i messed up the I/V resistor and cap connection, right? They should have a connection to ground
Attached Images
File Type: png ad1865-24bit_sch.png (32.6 KB, 194 views)

Last edited by skouliki; 10th April 2013 at 09:08 PM.
  Reply With Quote
Old 10th April 2013, 10:52 PM   #43
diyAudio Member
 
skouliki's Avatar
 
Join Date: Aug 2010
Location: Athens
the Iout pins are connected to ground Thanks marce for pointing this out
  Reply With Quote
Old 11th April 2013, 06:02 AM   #44
diyAudio Member
 
Join Date: Dec 2009
Send a message via Yahoo to Lil Knight
How about a dual AD1865 with I2S input and I-out board?
__________________

  Reply With Quote
Old 11th April 2013, 06:25 AM   #45
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Glad to help, I spend all day looking at schematics, data sheets and PCB's, luckily the system I use the schematic and PCB parts are interlinked so I don't get these problems (Cadstar).
A good tip is to get some coloured highlighter pens and trace over the lines with yellow when manually transferring, green for the first check and red for the final check.

Last edited by marce; 11th April 2013 at 06:28 AM.
  Reply With Quote
Old 11th April 2013, 08:07 AM   #46
diyAudio Member
 
Join Date: Feb 2003
Location: West Coast of Norway
Quote:
Originally Posted by lil' knight View Post
How about a dual AD1865 with I2S input and I-out board?
O yes
  Reply With Quote
Old 11th April 2013, 11:09 AM   #47
regal is offline regal  United States
diyAudio Member
 
Join Date: Jan 2004
Location: MD
Quote:
Originally Posted by bambadoo View Post
O yes
Those extra 6 bits added with the logic chips proably aren't adding resolution, it was more of a marketing gimmick that one manufacturer came up with in the 90's, I would want dual mono with LSB adjust to get the most out of this chip.
  Reply With Quote
Old 11th April 2013, 12:07 PM   #48
diyAudio Member
 
Join Date: Dec 2009
Send a message via Yahoo to Lil Knight
I've been dreaming about a dual AD1865 with I2S and balanced tube stage for a while but still nothing comes true. The only thing I came up with is this Matej's audio pages: Dual balanced NOS DAC AD1865 board but the author seemed to lost interest right after posting the layout... SPDIF is just the past to me right now.

Just a small board with headers for external modules (PSU, USB-I2S, IV) would be perfect. Heck, I will even offer free board as a gratitude for anyone comes up with this design.
__________________


Last edited by Lil Knight; 11th April 2013 at 12:11 PM.
  Reply With Quote
Old 11th April 2013, 01:25 PM   #49
JLOP is offline JLOP  France
diyAudio Member
 
Join Date: Sep 2011
Location: Luxembourg
Skouliki
For guys not used to double faced board, could you post the meaning for red/Green square /round dots to make 100% sure ?
Tks
Jean-Louis
  Reply With Quote
Old 11th April 2013, 08:07 PM   #50
diyAudio Member
 
skouliki's Avatar
 
Join Date: Aug 2010
Location: Athens
Yellow traces are on the top side , green is the colour of ground plane(bottom side). After i correct the pcb i will send you the board files plus the toner transfer pdf's
  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
AD1865 vs AD1955 toufu Digital Line Level 50 15th April 2012 01:59 AM
Schematic for AD1865 ebay dac? mkanna Digital Line Level 1 13th May 2011 03:26 AM
AD1865-based dac schematic Sandor Digital Line Level 8 16th March 2010 07:01 PM
AD1865 w/ USB? dsavitsk Digital Source 6 28th February 2006 10:47 AM
AD1865 where? avian Digital Source 2 5th January 2004 07:17 AM


New To Site? Need Help?

All times are GMT. The time now is 11:03 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