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 3rd March 2012, 09:45 PM   #1
audio39 is offline audio39  Canada
diyAudio Member
 
Join Date: Nov 2010
Location: Kanata, Ontario
Default Burr Brown PCM1702...K, U-K, U, P, J ???

I'm in the final phase of securing a DAC I've wanted for some time that uses 4 PCM1702 20-dip chips per channel.

So, I'm a mechanical guy, and all this digital stuff is giving me a headache.

I have found that the manufacturer used the PCM1702, whereas some companies used the PCM1702U, others the PCM1702J, and I could type for a while, but what is the difference between the chips.

I found some original prices on the net that seem to indicate that the K, U-K, and the U were more expensive - does this equate to better SNR? Is it an indicator of better QA techniques and mean that these chips are better matched?

Thanks in advance.
  Reply With Quote
Old 3rd March 2012, 09:54 PM   #2
diyAudio Member
 
Join Date: Nov 2006
Location: Lyon
Hi Audio39

Some hints there : http://www.ti.com/lit/ds/symlink/pcm1702.pdf
Maybe the answer is here...
Attached Images
File Type: jpg 1702.JPG (52.2 KB, 120 views)
  Reply With Quote
Old 3rd March 2012, 10:43 PM   #3
audio39 is offline audio39  Canada
diyAudio Member
 
Join Date: Nov 2010
Location: Kanata, Ontario
I've been through all of that data but it is just not clear to me.

My first interpretation of that data lead me to conclude that the "U" and the "K" marked chips would provide better SNR...but after looking at all the data I could find, well, it seemed less clear.
  Reply With Quote
Old 3rd March 2012, 11:15 PM   #4
audio39 is offline audio39  Canada
diyAudio Member
 
Join Date: Nov 2010
Location: Kanata, Ontario
Ok, so the "U" indicates that the chip is 20 pin. The "J" and the "K" are grade marks.

But there are a few others...I have found the "L" and others.

So is the "K" the top of the heap, and if so, what does that mean...better SNR??
  Reply With Quote
Old 4th March 2012, 02:56 AM   #5
diyAudio Member
 
Join Date: Oct 2006
The U means surface mount package. The grade marks are none, J and K, from least to best, and refers to how percisely they are calibrated in laser trimming. The datasheet does specify the differences in the performance data.
  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
Burr Brown PCM65 Ruach Digital Source 12 21st June 2013 04:22 PM
The Burr-Brown sound? Moset Analog Line Level 22 20th December 2011 07:18 PM
Burr Brown OPA627BP paul_peraic Parts 7 7th September 2008 08:30 AM
Burr Brown OPA655P Karsten Sømand Vendor's Bazaar 0 7th April 2007 06:17 AM
Looking for Burr Brown PCM63 Ruach Swap Meet 0 14th May 2006 03:07 PM


New To Site? Need Help?

All times are GMT. The time now is 06:18 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