Opamp death trap - LT1124 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

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 23rd May 2008, 02:51 AM   #1
banana is offline banana  Hong Kong
diyAudio Member
Join Date: Feb 2003
Location: Hong Kong
Default Opamp death trap - LT1124

I was looking for an 5532 upgrade, and have spotted this LT1124.
Nice spec, dual OP27 in SO8 package, with better noise and improved speed.

Bought one and soldered it onto PCB.
A few seconds later... holy smoke

I toasted another one again, until finally found out the reason. Wrong pinout.

I was not reading the datasheet careful enough. But I never expected there would be another dual Opamp pinout. Funny enough, the DIP package have common pinout. It's just the SO8 being different.

LT1124 might be a nice sounding chip, but with this outstanding pinout, I can hardly find an usage to try it
Attached Images
File Type: gif lt1124 pinout.gif (10.5 KB, 262 views)
  Reply With Quote
Old 23rd May 2008, 02:56 AM   #2
diyAudio Moderator Emeritus
Iain McNeill's Avatar
Join Date: Oct 2007
Location: Santa Cruz, California
I think that pin out was designed by the marketing dept.

...or the legal dept.

another complication we must navigate. Ho hum.
  Reply With Quote
Old 23rd May 2008, 03:39 AM   #3
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
"Read the prospectus CAREFULLY before you invest."
  Reply With Quote
Old 23rd May 2008, 04:08 AM   #4
diyAudio Member
Join Date: Mar 2007
Location: Canandaigua, NY USA
I've seen that before where the thru-hole parts are the same as expected, but the SMT part is different. I assume the dies are the same, so why somebody decided to change the SMT pinout is beyond comprehension
I may be barking up the wrong tree, but at least I'm barking!
  Reply With Quote


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
Is it a deception trap? Billypang The Lounge 1 29th January 2007 08:42 PM
EL PIPE-O and Tube trap in one? CptTripps Pass Labs 1 10th September 2003 05:08 PM

New To Site? Need Help?

All times are GMT. The time now is 10:23 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2