Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter - Page 140 - 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 1st November 2012, 03:13 PM   #1391
diyAudio Member
 
Join Date: Jul 2009
Quote:
Originally Posted by iancanada View Post
You mean you have already ordered the I2C isolator? I usually receive digikey orders in two days.

Please confirm the datasheet with the PCB footprint, I didnt do it.

Ian
Yes, I ordered the I2C isolator. As digikey require $100 order for free delivery, I had to order it from RS. Hope receive it early next week.
  Reply With Quote
Old 1st November 2012, 03:19 PM   #1392
diyAudio Member
 
Join Date: Jul 2009
Quote:
Originally Posted by syklab View Post
Hi,
Which isolator are you planing to use for I2C ?
SI8605AD-B-IS

Please see post #1331
  Reply With Quote
Old 1st November 2012, 03:52 PM   #1393
koldby is offline koldby  Denmark
diyAudio Member
 
Join Date: Jun 2003
Location: Ruds Vedby
Quote:
Originally Posted by qusp View Post
it will work yes, but I think its a better idea to use the isolator on the fifo
Ups guess I have scimmed this thread too quickly..
Is there an isolator on the FIFO board?
Koldby
__________________
What is Home Theatre without good sound?
  Reply With Quote
Old 1st November 2012, 04:17 PM   #1394
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
no, not on the board, but in lightning quick response to a suggestion, Ian whipped up this separate isolator, which doesnt just isolate USB, it isolates everything. its placed between the fifo main board and the reclock board, so everything including the fifo CPU itself is isolated immediately before the reclocking process, a much better idea if I do say so myself =) placed here it makes it so the reclock board and clock become part of the dac, not part of your source.

at this stage only the prototypes have been sent out to testing after Ian verified it himself, in fact pretty much the last 20 pages have been about the battery board, Si570 clock board interest list and the isolator.

so its not available for purchase just yet, not till we've finished our testing, but I feel confident it will be standard issue for most people from now on.
  Reply With Quote
Old 1st November 2012, 04:29 PM   #1395
diyAudio Member
 
iancanada's Avatar
 
Join Date: Dec 2009
Location: Toronto
Quote:
Originally Posted by syklab View Post
Hi,
Which isolator are you planing to use for I2C ?
Quote:
Originally Posted by bigpandahk View Post
SI8605AD-B-IS

Please see post #1331
Yes,
SI8605AC-B-IS1, 336-2052-5-ND is the one chip solution which providing both I2C isolation and full duplex serial port isolation. It fit the reserved footprint on the isolator board PCB.
__________________
Ian GBV+: I2S to PCM converter board & other accessories
http://www.diyaudio.com/forums/group...ml#post4117119
  Reply With Quote
Old 1st November 2012, 04:37 PM   #1396
diyAudio Member
 
iancanada's Avatar
 
Join Date: Dec 2009
Location: Toronto
Quote:
Originally Posted by bigpandahk View Post
Yes, I ordered the I2C isolator. As digikey require $100 order for free delivery, I had to order it from RS. Hope receive it early next week.
That's unfair. I need ordering more than $200- to get the free shipping .
__________________
Ian GBV+: I2S to PCM converter board & other accessories
http://www.diyaudio.com/forums/group...ml#post4117119
  Reply With Quote
Old 1st November 2012, 04:46 PM   #1397
syklab is offline syklab  Hong Kong
diyAudio Member
 
Join Date: Jul 2009
Location: Hong Kong
Element14 only require 200HK$ min order for free shipping but they don't carry any SI isolator.
  Reply With Quote
Old 1st November 2012, 07:53 PM   #1398
ggking7 is offline ggking7  United States
diyAudio Member
 
Join Date: Sep 2010
Quote:
What about this configuration:
USB isolator (ADuM4160 USB Isolator board by Circuits@Home [CAH-ASSY-UI] - 44,90*€ : lipoly.de, Alles für den Elektromodellflug.) - to - USB to I2S Audio Widget (Q N K T C USB-I2S Module and Analog Board) - to - I2S FIFO - to - DAC
I believe that isolator uses a switching regulator. Here is an alternative with a linear reg:

Ultravox - SGD70.00 : Welcome to the diyparadise e-store!

That said, I noticed an "unlivening" of the sound when using it that was confirmed by a well-known DAC designer. It did seem to cut PC noise though, with a blacker background and less brightness.
  Reply With Quote
Old 3rd November 2012, 04:54 AM   #1399
diyAudio Member
 
iancanada's Avatar
 
Join Date: Dec 2009
Location: Toronto
Default Assemble Si8605AD I2C/USART digital isolator to the FIFO isolator board

Si8605 arrived yesterday. I assembled it to the isolator board. It will work for ESS9018 with external controller. Just fit the reserved PCB footprint on the FIFO isolator board. Pull up resistors might be required for the I2C bus on both sides.

Digikey P/N: 336-2053-5-ND

Ian
Attached Images
File Type: jpg Si8605.JPG (211.5 KB, 333 views)
File Type: jpg I2Cisloator1.JPG (583.5 KB, 328 views)
File Type: jpg I2Cisloator2.JPG (477.4 KB, 319 views)
__________________
Ian GBV+: I2S to PCM converter board & other accessories
http://www.diyaudio.com/forums/group...ml#post4117119
  Reply With Quote
Old 3rd November 2012, 07:48 AM   #1400
diyAudio Member
 
Join Date: Mar 2010
Quote:
Originally Posted by iancanada View Post
Si8605 arrived yesterday. I assembled it to the isolator board. It will work for ESS9018 with external controller. Just fit the reserved PCB footprint on the FIFO isolator board. Pull up resistors might be required for the I2C bus on both sides.

Digikey P/N: 336-2053-5-ND

Ian
Ian, it Looks beautiful.
I couldn't keep up with your update, I think that is a good sign for lazy people like me to keep reading.

I received your power management board, I just want to confirm the resistors to make sure I didn't do a silly mistake:
1. R1, 2, 5, 6, 8, 10 are 0ohm
2. R11 is 100ohm
3. R3, 4, 7, 9 are 1kohm
4. R12, 13 are short because my -ve is Gnd

Thanks.
  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
XMOS-based Asynchronous USB to I2S interface Lorien Digital Source 2216 18th November 2014 09:19 PM
exaU2I - Multi-Channel Asynchronous USB to I2S Interface exa065 exaDevices 1357 3rd March 2014 09:51 PM
DAC chip selection + I2S jitter questions drwho9437 Digital Line Level 2 26th July 2010 01:50 PM
Simple FIFO to I2S CPLD, for MCU players / reclocking KOON3876 Digital Line Level 21 19th September 2008 05:00 PM
asynchronous reclocking and low jitter clocks ash_dac Digital Source 3 8th February 2005 10:22 AM


New To Site? Need Help?

All times are GMT. The time now is 08:59 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