Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

some help on dac grounding, please
some help on dac grounding, please
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
Thread Tools Search this Thread
Old 3rd April 2009, 06:05 PM   #1
federico moreno is offline federico moreno  Argentina
diyAudio Member
Join Date: Dec 2003
Location: Buenos Aires, Argentina
Default some help on dac grounding, please

Hi. Im a newbie to digital, and Im making a dac around CS8414/pcm1730 chips.

For each chip, I have made some kind of smdadaptor, etching little pcbs (app. 2x2 cms.).

Those pcbs will be soldered smd style to a continuous, solid ground plane. Trying to make sense of the things that I have read in other threads about digital grounding ( yes, I have searched...), the ground plane will be intact, without vias and without any kind of interruption.
The separation between chips and ground plane will be +/- 0.6 mm.

Chips will be connected with ribbon cable, flat against the ground plane, and oriented in such a way that there will be no crossing of signal carriers and power supply conductors.

Now, the tricky part:
Which of the following options -if any- is the better way to provide power and grounding to the final pcb?

1) With twisted pairs (v+ and gnd), right to the main ICs pins, from an independent, grounded modular pcb with rectification, regs etc contained in that board?

2) Ditto, but placing the regs in the dac board, as close as possible to the main chips?

3)Or sending the various v+ needed (+5v analog, +5v digital, + 3.3v digital and +/- 12 v analog for the output stage) with separate single cables, and only one ground cable connected to a star point in the psu board? (sounds weird...)

3)Is any other kind of ground connection needed for the main pcb? (I ask this because, in some pcbs, I have seen additional grounding to chassis provided with screws attached to the pcb ground and uninsulated standoffs)... And for the SPDIF input?

Ill appreciate any input on this confuse tem. Im trying to maintain loops as small as possible, a difficult task with single sided pcbs .

Thank you very much in advance.
  Reply With Quote


some help on dac grounding, pleaseHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
The grounding Professor smith Pass Labs 100 4th July 2009 04:19 AM
Lions and Tigers and Grounding Problems, Oh My! DoZ Grounding... EchoWars Solid State 37 3rd August 2008 09:50 AM
Grounding tonistefanovski Pass Labs 5 15th November 2006 02:37 PM
LM3875 kit grounding, optimal grounding for separate amps and psu? findog Chip Amps 9 16th May 2005 10:27 PM
grounding Lico Tubes / Valves 2 13th November 2003 05:15 AM

New To Site? Need Help?

All times are GMT. The time now is 07:08 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio