NJM4580 to OPA2228, which one exactly? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, 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 5th November 2008, 09:02 PM   #1
minnie is offline minnie  Australia
diyAudio Member
 
Join Date: Nov 2008
Default NJM4580 to OPA2228, which one exactly?

I'm looking into changing the x10 NJM4580 op amps in a Behringer Mic Pre I have to Burr-Brown (now Texas Instruments) OPA228's.

Aside from the original IC's being glued on it all looks fairly do-able with my somewhat limited level of electronics knowledge.

Please forgive my ignorance, but I'm trying to find out which ti OPA2228 exactly, they come in a few different ways. P, U, UA etc'

Here is the original chips datasheet
http://semicon.njr.co.jp/njr/hp/file...o?_mediaId=152

and here is the datasheet for the 2228
http://focus.ti.com/docs/prod/folder...t/opa2228.html

If anyone has to time to let me know I''d be off and running.
  Reply With Quote
Old 6th November 2008, 12:50 AM   #2
diyAudio Member
 
Join Date: Apr 2006
Location: United States NY
When you refer to the NM4580 being glued on, do you mean its a surface mount chip soldered on? ie: is it about 7mm sized?

If you dont have good equipment and skills, you'll probably end up ripping/delaminating the circuit board traces off the board.

Also, do you know what purpose the njm4580's serve? The opa2228 although nice isnt unity gain stable. It needs a gain of at least 5. You would have better luck with the opa2227.

opa2228P = dip package
opa2228ua = smd [surface mount] size
opa2228u = same as the opa2228ua except with better tolerance.
  Reply With Quote
Old 8th November 2008, 12:14 AM   #3
minnie is offline minnie  Australia
diyAudio Member
 
Join Date: Nov 2008
thanks for that.

No, I don't have schematics so don't know what each chip is doing.
I will take a another look but from memory it was surface mount chips, yep about 7mm.

This unit is rarely set below 5 input gain wise, is that what you mean?
  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
OPA2228 what can it be used for Nordic Chip Amps 3 10th December 2006 11:05 AM
where can I get a SSOP8 NJM4580 ? ashok Parts 5 22nd February 2006 10:38 AM
How to upgrade CDP head phone amp (NJM4580) DIAR Chip Amps 7 30th July 2004 01:23 AM
Opa2228 schnullimaus Parts 9 26th July 2004 10:39 PM
NJM4580 SIP op amp... where to buy in USA? Stephen D Solid State 2 6th April 2004 07:37 AM


New To Site? Need Help?

All times are GMT. The time now is 04:58 AM.


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