Favorite Op-amp

[NiHaoMike]

OPA1612 is my favorite for general purpose high end audio.

[Zero999]

For R-R operation, TLC2272 /4.

Yeah, they're nice. 

Except they don't have R-R inputs, just outputs. The inputs are only specified  from V_SS to V_DD-1.5V.

[schmitt trigger]

You are correct, I should have added that info

[hans]

ISL28133, because really want some more of that open loop gain at low current consumption.

[SeanB]

The OPA549  always makes me happy.

It's like the tank of opamps.

8 amps continuous output at up to 60V single supply or 30v dual supply.

Recommend application:  source & sink lab powersupply
hehehe 

I inherited a tube of 30 and like to use them for stupid stuff just because its funny.
They cost to much to actually be worth buying for anything hobby related.

LH0033 similar for me, after all who else made a "DAMN Fast" amplifier.

[Tedro]

OPA637/OPA627

[ogden]

For near-DC applications: OPA333/OPA2333. Otherwise it depends. Unless you are working in one particular area like audio, you never know what kind of opamp you will need tomorrow. One day it will be > 100MHz GBW no matter how much heat it dissipates, another day you may look for low input bias current and shutdown pin to save power. There are so many different kinds of opamps for a reason.

[David Hess]

For R-R operation, TLC2272 /4.

Yeah, they're nice. 

Except they don't have R-R inputs, just outputs. The inputs are only specified  from V_SS to V_DD-1.5V.

I have used that series before where I needed a 324/358 with low input bias current or an output which goes completely to ground.  Like all 16 volt CMOS process parts, they are very intolerant of over-voltage so beware; I found this out the hard way.

As shown below, one section is a 4 resistor instrumentation amplifier that could have used any general purpose part and the second section is a low drift integrator used as an analog memory with 2N3904 base-collector junctions used as low leakage diodes to control leakage to the summing junction.  One diode ramps the integrator one way and the other ramps it the other way to reset it.  I do not remember what the drift was but it was probably like 10 microvolts per second.  You can see that I used a pretty high quality capacitor but it was just what I had laying around in my junk box.

The very similar National LMC6082 might have performed a little better and would have been my preferred part but the TI TLC2272 was in my box of samples and did what I needed.

[james_s]

I tend to use the TL08x for general purpose stuff. It's not fancy but it does the job.

[David Hess]

I tend to use the TL08x for general purpose stuff. It's not fancy but it does the job.

I do also but only because I am still working my way through a drawer full of them.

The TL05x is a generally improved replacement for the TL08x at practically the same price.  The TL03x is the low power version of the TL05x making it a replacement for the TL06x.

I guess the even newer replacements were suppose to be the TLE207x series but they are considerably more expensive.

All of these JFET input parts are also sometimes a replacement for the 301A because their input common mode range includes their positive supply making them useful as high side current sense amplifiers.

[digsys]

LT1990 hands down:-)  x1 x10
Constantly dealing with HV +/= supplies, all sorts of rail voltages. Damn stable and accurate. If sex with ICs was legal .. errrr that's another story ...

[Vtile]

If it do have BB stamp on it, I'm pretty sure that it is my favorite or at least close enough for hobbyist like me.   

[SilverSolder]

LT1990 hands down:-)  x1 x10

That's one tough little IC!! 

[digsys]

That's one tough little IC!! 

The reason I love it - https://pbase.com/digsys/image/161061565  https://pbase.com/digsys/image/161061592
I design / make EV battery packs, which can go up to 220VDC per module - Each BMS has 22x "floating" HV Inputs (+4 dedicated), which I can wire in ANY
sequence to ANY cell in the pack .. PLUS .. I can connect, if I wish, LV Temp sensors, the LV battery, airflow sensors etc etc in ANY order !! to any Input.
Naturally, IF I did that, I'd have to physically protect wiring, but in a race it means I have incredible flexibility / redundancy.
These were originally developed for AC / DC motor sense / control systems, but screw those hippies :-)
Full floating (1Mohm = close enough) +/- 250V

[ubbut]

As others have pointed out, the TLC2272 is a good R2R  alternative to the TL072.
I would like to add the TLV2171, which has R2R outputs, and almost R2R inputs. It is a bit noisier, but also substantially cheaper.

In terms of R2R alternatives for the NE5532, OPA1612 was suggested below above. A cost saving alternative is the OPA1678 which is my new favourite OpAmp
R2R output, costs almost the same as the 5532, similar performance,

[SilverSolder]

I design / make EV battery packs, which can go up to 220VDC per module

I didn't know you could get op amps that would accept such high voltages.  Learn something new every day!

[splin]

I design / make EV battery packs, which can go up to 220VDC per module

I didn't know you could get op amps that would accept such high voltages.  Learn something new every day!

The ADHV4702 can up operate with supply voltage up to 220V:

https://www.eevblog.com/forum/projects/new-high-voltage-opamp-adhv4702-1/

[David Hess]

I design / make EV battery packs, which can go up to 220VDC per module

I didn't know you could get op amps that would accept such high voltages.  Learn something new every day!

The LT1990 is a difference amplifier and not an operational amplifier.  Essentially it is an integrated variation of the standard 4 resistor instrumentation amplifier which can be extended to handle higher input voltages at the expense of precision.

The ADHV4702 can up operate with supply voltage up to 220V:

https://www.eevblog.com/forum/projects/new-high-voltage-opamp-adhv4702-1/

Integrated high voltage operational amplifiers have been around for a long time in various implementations.  But watch out of the maximum differential input voltage which is only +/-2 volts for the ADHV4702.

As others have pointed out, the TLC2272 is a good R2R  alternative to the TL072.
I would like to add the TLV2171, which has R2R outputs, and almost R2R inputs. It is a bit noisier, but also substantially cheaper.

In terms of R2R alternatives for the NE5532, OPA1612 was suggested below above. A cost saving alternative is the OPA1678 which is my new favourite OpAmp
R2R output, costs almost the same as the 5532, similar performance,

Rail-to-rail outputs can also be added to a single operational amplifier by driving a pair of common emitter/source output transistors through the supply pins.  This configuration as shown below is also useful for boosting the output slew rate and full power bandwidth at higher closed loop gains without sacrificing precision and noise.

[digsys]

The LT1990 is a difference amplifier and not an operational amplifier.  Essentially it is an integrated variation of the standard 4 resistor instrumentation amplifier which can be extended to handle higher input voltages at the expense of precision.

You sure are tough marking :-). For the LT1990A, in preset x1 x10 gain mode, I get ~ 0.02% - 0.03%+ without trimming and gain linearity around 0.001%+

[David Hess]

The LT1990 is a difference amplifier and not an operational amplifier.  Essentially it is an integrated variation of the standard 4 resistor instrumentation amplifier which can be extended to handle higher input voltages at the expense of precision.

You sure are tough marking :-). For the LT1990A, in preset x1 x10 gain mode, I get ~ 0.02% - 0.03%+ without trimming and gain linearity around 0.001%+

It is relative.  The attenuation of the input signal by the input networks which raises the common mode range also directly increase the noise gain and lowers excess gain by the same amount.  Without the attenuation, precision would be 25 times greater.  This is not a problem for its intended applications where increasing the input common mode range is absolutely required and the decrease in precision is acceptable.

The increase in noise and loss of precision are reflected in the input noise specifications and input offset specifications which are at least 10 to 20 times higher than the operational amplifier used.

The big advantage of using a part like this is that the precision resistor network is included and its effects are part of the specifications.  Designing a discrete implementation with similar performance using the same topology would be a real challenge.

[technix]

For me it is LMV321/358/324 line. Cheap and generally works good.

[Neomys Sapiens]

TLE2xxx Excalibur series, LT1468/69, ISL55001/55004, ISL28118, LT1800, LMP2021/2022, LMH6612, AD845, AD822, ADA4077,

[schmitt trigger]

From what I can gather from these posts, is that only a pair of companies; Texas Instruments  (with Burr Brown and National), and Analog ( with Linear Tech) dominate this market.

Conspicuously absent are original components from  Onsemi ( with Fairchild), STMicro, Infineon. Although they second source many of them.

My limited reckoning is that Micochip is working hard to also become a linear powerhouse.

[guenthert]

Opa365. Under 5.5v, tell me what it can't do .

Not available in PDIP, that's a real drawback for hobbyists like me 

[Gyro]

It's worth keeping a small stock of SO8 - DIP converter boards in the drawer. 

https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=so8+dip&_sacat=0