Question for op-amp guru's

[ALW]

I'm looking for an op-amp to replace a TL074 in an active filter application. Any suggestions for quad packages as a drop-in replacement for an existing product?

I haven't really decided on target performance yet, but lower noise JFET types are the immediate goal.

I've had a quick scan through the parametric searches, but would love any other advice from those who've tried alternatives.

A.

 

[mikek]

...would generaly avoid quads....try duals eg NE5532.....

 

[Bill Fitzpatrick]

You want a drop in replacement so the 5532 is not a contender.

How about the OPA4134?

 

[ThingyNess]

I second Bill's suggestion for the OPA4134 - the OPA4132 would work just as well, with better DC precision (less offset, among other things), but if I remember correct, the DIP versions have been discontinued (only the 14-SOIC package is available currently)

 

[johnny1]

Bill is right. You won't find anything better with four op amps in the same case.

 

[puppyslugg]

LT1362:

http://www.linear-tech.com/prod/datasheet.html?datasheet=81

LT1365:

http://www.linear-tech.com/pub/q_srch.html?target=lt1365&pub_type=All&product_family=All

opa42228:

http://www-s.ti.com/sc/ds/opa2228.pdf

 

[Nisbeth]

The OPA4132/4 are discontinued in the DIP-14 package. The OPA 4228 should work well instead.

/U.

 

[ALW]

Big thanks

Mikek,

I'd normally avoid quads too, but no choice in this case, I need drop-in replacement.

Thanks to everyone else, I'll download data sheets and investigate further, will let you know the outcome. Thanks for taking the time to post.

Andy.

 

[Petter]

Search the forum for "Brown Dog" and you will find various adapters. I would go for an adapter that would adapt 4 single SMT units to a quad if available and add local decoupling in the process.

If such adapter is not available I would make one myself. It is not that hard.

Petter

 

[carlmart]

Quad adapters

AFAIK Brown Dog is not making any singles to quad adapters: only duals.

Which is a pity, because the ART DI/O DAC, which is one of the most modded units right off the shop, uses quads. And one of the better mods is using AD825s.

People are using LT1362/1365 instead, FET biased to class A. But they are expensive quads.


Carlos