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What is your favorite most versatile op-amp?
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maxwell3e10:
I've been looking for a versatile op-amp that can work close to ideal in a wide range of circuits.
Here is my list of requirements:
Voltage supply +/- 15V
Input voltage offset < 1mV
Input bias current <1 nA
Input voltage noise < 10nV/sqrt(Hz)
GBW >10 MHz but <100 MHz, not prone to oscillations
Slew rate >20 V/usec
Unity gain stable
Output current >50 mA

Ideally available in PDIP-8 package and as a dual op-amp. So far the best I found is OPA2132. What are other good candidates?
OM222O:
can I ask why you care about the output current? if you need high current, just use a fet or a bjt as a buffer  :-/O
I know this doesn't meet your requirements but 99% of my projects are low voltage and single supply (0 to 5v), so I always choose rail to rail op amps.
my go to is the MCP600x (x can be 1, 2 or 4) which seems to be extremely stable, it has never had stability issues in my experience where other amps have (I remember a particular application where the TLV9002, OPA2333 and a few more had issues with oscillations but the MCP6002 worked like a charm). I know you should design your products to not have stability problems and what I described earlier is "bad practice" but I mean, if it works it's good enough for me  :-//
For higher precision applications I usually go with the MAX4238 which dave used in his uCurrent. I bought a few to play around with and test them just for fun, but they performed great and are my other go to for precision applications  :-+
maxwell3e10:
For single-supply applications the requirements are different, rail-to-rail is more important and easier to use a single transistor buffer. I tend to work on bipolar circuits, so rail-to-rail has not been an issue.
Conrad Hoffman:
You didn't mention cost. I think that's expensive. I also like the AD845, but it's even more. For many things the audio opamps like the LME series work well, say LME49720, but I don't know if you can get the LME series anymore (Mouser seems to have 'em). They tend to have good output drive. Don't forget the Japanese parts like NJM4556 and similar. It just depends on what kinds of circuits you build; that's why there are so many choices. I once thought the good old LF411 could do nearly anything, but it's not that fast. Needless to say, I keep more than one part type around!
exmadscientist:
OPA192/2192/4192 will do for just about any "jellybean" op-amp application. It meets all of your desired specifications and then some, except for not coming in DIP-8. (Something I, personally, could not care less about.) Its downsides are that it's on the pricey side, it's got a bit more input capacitance than you sometimes want (I think due to the special sauce in the offset trim? Might be worth reading the relevant patents here...), and it has the usual RRI offset voltage wobble located at input CM voltages around a couple volts below the positive supply (though it's a small wobble as far as these things go).

The cost is no problem for prototype and lab work, but means that the OPA192 is not quite a "production jellybean". However, TI does offer a pretty wide set of cut-down versions that trade off one or more characteristics like offset or speed in exchange for cost, so you can compromise where it doesn't matter.
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