Help with op amp selection that is uni-polar stable - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 14th March 2012, 05:06 AM   #1
Stasiu is offline Stasiu  United States
diyAudio Member
Join Date: May 2006
Default Help with op amp selection that is uni-polar stable

I want to upgrading the input and output section of the DSP/DAC I use in my car. The input op amps (TL074) are powered by single supply rails of +12v and the output (TS974IPT) are powered by +5V.

Click the image to open in full size.

Click the image to open in full size.

Can anyone give me some options that would be stable in this configuration. I don't want to buy a bunch of op amps for testing purposes. My main concern it to try and reduce some of the noise in this circuit. A LT1216 was found to be stable when used on the input as was a LME49743 for the output. The former is not available through any retailer I looked at, while the latter is a viable option.
  Reply With Quote
Old 19th March 2012, 03:34 AM   #2
Stasiu is offline Stasiu  United States
diyAudio Member
Join Date: May 2006
So I've done a little more digging and realize the correct terminoligy is single rail stable. Based on the data sheets from Texas Instruments, OPA4209(TSSOP) and OPA4940 (SOIC) shoud work. If anyone could give me some feedback, I'd appreciate it. I'm not stuck on using any particular op amp, so other suggestions would be welcome. As I mentioned before my goal is to reduce some of the noise I hear when the gain on the pre-amp is turned high, not necessarily a "better sounding" op amp, while maintaining stability with the current voltage supply.
  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
Swapping Op-Amps... you have checked to see it's stable haven't you ? Mooly Analog Line Level 123 14th November 2014 10:41 AM
OP AMP Selection JBL Man Chip Amps 1 16th May 2008 06:42 AM
Is this amp 2-ohm stable? michal Car Audio 4 1st July 2005 04:59 AM
Can I make a Non-Polar Electrolytic using two polar ones PaulHilgeman Parts 6 10th February 2003 12:07 AM
2 ohm stable Symemetrical amp halvardf Solid State 4 14th September 2002 04:16 PM

New To Site? Need Help?

All times are GMT. The time now is 02:04 AM.

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