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 Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

SAA7323 Vref pin?
SAA7323 Vref pin?
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 16th September 2008, 03:35 AM   #1
jnewbold is offline jnewbold  Australia
diyAudio Member
Join Date: Jun 2003
Location: Perth, Australia
Default SAA7323 Vref pin?

I have been reading an old thread (Bit stream and Bass 2004) on DIYaudio.com where JohnW discussed upgrading the Vref capacitor of the SAA7323/7350 DACs. I would like to apply this mod (among others) to my Rotel RCD965BX which used the SAA7323 DAC.


However my main problem is that I am not technical enough to identify the Vref pin on the SAA7323 chip. I have asked this question on the other thread but there was no response.

Looking at the data sheet I can't see a pin labelled simply "vref." However I can see a VREFL (pin 7) and a VREFR (pin 3) which the data sheet describes as the "reference voltage inputs for the analog left and right channel grounds, and are normally connected to VRO."

Pin 16 is VRO whch the data sheet describes as the "internal voltage reference output [+2.5V]".

In the Rotel, these pins are decoupled by 47uF BlackGates and 47nF ceramics.

I also see pin 17 VRC (internal reference voltage high impedance node requiring an external smoothing capacitor) On the 965BX this is decoupled by a 4.7uF Black Gate and 47nF ceramic.

Can anyone tell me whether pin 16 (VRO) is the Vref pin described in the thread, or if not, which pin is Vref?

Attached Files
File Type: pdf saa7323 vref?.pdf (13.3 KB, 49 views)
  Reply With Quote


SAA7323 Vref pin?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tda1545a vref capacitor ash_dac Digital Source 39 1st January 2014 01:21 PM
External switched capacitor integrator (clear saa7323 datasheet needed) ash_dac Digital Source 6 8th May 2006 12:21 AM
Passive I/V Vref dsavitsk Digital Source 4 22nd November 2005 03:07 PM
New filter for SAA7323 Fin Digital Source 0 18th December 2003 02:19 AM
AD580 2.5 V very low noise VRef jackinnj Swap Meet 0 2nd September 2002 03:11 PM

New To Site? Need Help?

All times are GMT. The time now is 08:40 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio