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Old 12th May 2014, 02:47 AM   #1
hjf is offline hjf  Argentina
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Default Low Noise opamps for 2014?

I'm making some audio opamp circuits, some LPF (for subwoofers), some summing amp circuit, etc.

Usually I go for TL072 and NE5532, but I was wondering, what opamps do you use nowadays?

I'm looking for low noise, decent slew rate, and not exaggerated bandwidth. And most important of all: sane price. No $25 opamps for a silly audio filter!
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Old 12th May 2014, 03:56 AM   #2
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OPA2134 DigiKey OPA2134

Mike
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Old 12th May 2014, 04:28 AM   #3
djoffe is offline djoffe  United States
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OPA2134...They look nice...

These are also pretty nice:

http://www.ti.com/lit/ds/symlink/lme49720.pdf

although I'm not sure...the 50 MHz bandwidth might be wide enough to make you uncomfortable...
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Old 12th May 2014, 04:42 AM   #4
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although I'm not sure...the 50 MHz bandwidth might be wide enough to make you uncomfortable...
That's why I didn't mention it. It's hard to beat when used wisely, but it MUST be used wisely.

Mike
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Old 12th May 2014, 04:48 AM   #5
hjf is offline hjf  Argentina
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I also found AD8599 though it's a bit more expensive.
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Old 12th May 2014, 05:02 AM   #6
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LM4562NA it is also similar I think
try the LM4562HA too that somebody says it is superb...
with high performance opamp the PSU & decoupling caps should be wise too.

I read again post #1, but for "only" low frequency/LPF NE5532, LM833 or other bipolar type input maybe sound not so different...

You can try it by yourself, you can have fun to try bipolar type opamp & compare it to jfet type for your LPF... lets start with NE5532 vs TL072

some expensive opamp need better PSU too, to sound at it best
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Old 12th May 2014, 05:03 AM   #7
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I don't know if it's a problem for you but the AD8599 is only available in surface mount. It does look like a descent one for audio.

Mike
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Old 12th May 2014, 05:05 AM   #8
hjf is offline hjf  Argentina
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Quote:
Originally Posted by JOHN BALI View Post
some expensive opamp need better PSU too, to sound at it best
i saw LT3032

ultralow noise dual regulator... only 150mA though. but 20uV noise! and +/- in a single IC
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Old 12th May 2014, 05:08 AM   #9
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Quote:
Originally Posted by hjf View Post
Usually I go for TL072 and NE5532, but I was wondering, what opamps do you use nowadays?
OPA 2132/2134

LM4562/LME49720

LT1124
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Old 12th May 2014, 05:16 AM   #10
hjf is offline hjf  Argentina
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Originally Posted by Passinwind View Post
OPA 2132/2134

LM4562/LME49720

LT1124
LME49xxx is mentioned a lot
let's go all the way up to LME49990! so many 9s! that MUST be the top of the line, no?

Ultra low noise, ultra low distortion. From the Overture E-series.

Overture as in LM3886?
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