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Old 25th March 2005, 03:57 PM   #1
speaker is offline speaker  United States
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Talking The "Best" Opamp - Opine Please

What are the newer ones I should be looking at that are compatible in place of the the TL072 types?

It has been awhile since I've delved into the opamp side of things. Suffice to say, my last high-end opamp reference would be to the Analog Devices AD712 series.

I'll appreciate the info.

speaker
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Old 25th March 2005, 04:38 PM   #2
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Hi Speaker !

The best opamp, by my opinion, is an old one: opa 627 from Burr-Brown now owned by TI.

Thorsten
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Old 25th March 2005, 06:27 PM   #3
jcx is offline jcx  United States
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my opine is u should learn to search!

many threads here already discuss op amp replacement in some depth

for more sources try google on combinations of
doug self, jon risch, tangent, tangentsoft and op amp, + substitute, upgrade , replacement, rolling...

you'll easily find more opinions that anyone might care to read

to address the issue of diffuse, low information content, repetitive posting the forum has added the "did you search" checkbox - SEARCH 1st
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Old 25th March 2005, 07:36 PM   #4
PMA is offline PMA  Europe
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How about uA709 ?
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Old 25th March 2005, 10:32 PM   #5
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..some people also love 741...

No honestly speaking I was often using the NE5534
Cheap and OK...
When working with high values of resistor I typical used
TL072...
And when I had some money, then the LT1037or OP37....
Long time back .


One year back I had look to more modern types, which I never
tried. But their data sheets look promising:
OPA 2111
OPA 2132 (single) / OPA 2134 (dual)
AD 826 (quite fast, unity gain 50MHz)
AD 829 (fxxx high unity gain of 120MHz)
AD8510 (single) / AD 8512 (dual) / AD 8513 (quad)
AD 8033 (single) / 8034 (dual) (nice alrounder, unity gain 40MHz, but be careful with supply voltage==> not more than +/-12V)
AD 8065 / 8066 , promising trade off between speed & low noise

Have fun
Markus
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Old 25th March 2005, 10:57 PM   #6
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Uhps
I had forgotten the most promising one:
AD8610 / 8620
!!!!!
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Old 26th March 2005, 01:26 AM   #7
KarlDL is offline KarlDL  United States
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I would consider the AD-8610 and OPA-627 at the "high end", OPA-604 as a "middling", and the OPA-2134 (et. al.) at the "low end". All will be superior to the ubiquitous veteran TL072. (as for PMA's comments, I was a A748 fan as an undergraduate in the early 70s)

The highly-regarded Odyssey Tempest preamp uses OPA-604 buffers and NE-5534s in its output stage (European friends, this is the Symphonic Line RG-11 board in an American package).

The bottom line is to acquire several of each and conduct your own sonic evaluations. I'm still working on the headphone amp(s) that will facilitate such.
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Old 26th March 2005, 02:54 AM   #8
Leolabs is offline Leolabs  Malaysia
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my favourite dual:

4558 for lowest level,then TLO72 for a better one,NE5532 for beefy power supply,OP249 for "straight" sound.Video grade opamp like ADxxx or LMxxxx are just for fun and crazy experiment!
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Old 26th March 2005, 03:46 AM   #9
speaker is offline speaker  United States
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Quote:
Originally posted by jcx
my opine is u should learn to search!

many threads here already discuss op amp replacement in some depth

for more sources try google on combinations of
doug self, jon risch, tangent, tangentsoft and op amp, + substitute, upgrade , replacement, rolling...

you'll easily find more opinions that anyone might care to read

to address the issue of diffuse, low information content, repetitive posting the forum has added the "did you search" checkbox - SEARCH 1st

More whine than opine from thine.



Prior search effected, results collected & more info duly requested.

Many thanks for everyone else's contribution.

speaker
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Old 26th March 2005, 04:13 AM   #10
Mr Evil is offline Mr Evil  United Kingdom
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There is no single best op-amp as there are far too many conflicting variables. There are many possible good choices depending on which factors are the most important for the application: Distortion; bandwidth; supply voltage range; noise; power; package; offset; cost etc.

I think OPA627 is widely regarded as the best audio op-amp generally. Certainly the specs are excellent and it's very stable, it's just rather expensive. NE5534 is a good low-cost choice, although the bipolar input stage can be a disadvantage.

I would stay away from OPA604 (and 2604). Although the datasheet makes it look very promising, having gone thorough a lot of them over the last few years (bought a huge tube of them - bad choice) I have increasingly come to see that they are really no better than average at best. D. Self also comes to this conclusion via his distortion measurements.
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