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OP amp equivalents
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cowasaki:
Is there an op amp equivalent database?

I'm repairing random amplifiers there are certain op amps that turn up regularly but also some that I just haven't seen for a while.  Even if I only use the equivalent to test and diagnose problems before ordering the right ones
DaJMasta:
Are they from a specific series or something?  A lot of models are still around, but something like RCA's SK series replacement parts usually are listed in reverse - they were marketed as replacements for a variety of amps, so you'd be better off looking up the part and finding what they would replace.


Otherwise, if you have a datasheet for the original, you can probably get a close match for gain bandwidth product, input bias current, voltage range, slew rate, etc. and get something pretty close or better specified than the original.  Maybe what they're used for is a better place to start?  A lot of opamp uses don't really demand any particular replacement, but higher bandwidth, high sensitivity frontends, low distortion requirements, etc. could push you towards a good general replacement for the application.
mzzj:
Google for op amp cross reference” and you get quite many hits
cowasaki:

--- Quote from: mzzj on October 17, 2019, 08:01:53 pm ---Google for op amp cross reference” and you get quite many hits

--- End quote ---

Thanks!  I tried several google searches but hadn't typed just that.  That has brought up a few thanks.
Zero999:
It's much better to learn about the different types of op-amps and why a certain part can be used as a substitute.

Start by reading about the basic op-amp parameters:
Gain bandwidth product.
Slew rate.
Equivalent input noise voltage.
Bias current.
Input offset voltage.
Common mode range.
Supply voltage range.
Maximum output current.

Then there are the different types of input stages with J-FET, MOSFET and BJT being the most common.

I appreciate this can be daunting. My advice would be to ask a question here about substituting a specific op-amp for another.

If you know why, then you won't need a list of substitutions. You'll be able to find a suitable alternative by using the parametric search feature provided by many component distributors such as Mouser and Digikey. In fact even without really understanding why, the parametric search can help, but it's always better to understand what you're doing, rather than working blind.
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