Best opamp for audio, operating at +5V only

trodas · 18th August 2008, 10:58 PM

I have a dilema and I would like to hear your recommendation for best audio dual SOIC opamp, running at +5V only. Not much is there to choose from, but I'm sort of torn between these there:

AD823 http://www.analog.com/en/amplifiers-...s/product.html
LM4562 http://www.national.com/pf/LM/LM4562.html
AD8397 http://www.analog.com/en/amplifiers-...s/product.html

AD823 got a bad name for being too harsh and flat sounding (and hard to get one), LM4562 is picky a like to pick up interferences, not to mention still being a bit too much harsh/sharp ... (but I have few at hand) and I did not know much about AD8397, except that it could be get as sample easily.

The opamp will be used as LineIn input opamp on my X-Fi. Replacing a MC33078 opamp.

So, guys, are any of these even better that the TI original MC33078? And witch one would you recommend to install?

linuxguru · 20th August 2008, 05:51 AM

LM4562 should win hands down on THD numbers and just about every specification. For sonics, you may also want to give the old TL062 micropower op-amp a listen - it will run on +/- 2.5v, but it's very close to the lower Vcc limit.

danb1974 · 20th August 2008, 02:00 PM

How about opa2134?

Anyway there is no universal best, just the one you like more how it sounds

trodas · 21st August 2008, 12:44 AM

Could be... how about these?

AD826 - slew rate - 350V/us, noise 15nV/Hz, supply 5-36V (CMRR 80dB)
AD823 - slew rate - 22Vus, noise 16nV/Hz, supply 3-36V (CMRR 75dB)
LM4562 - slew rate - 20V/us, noise 2.7nV/Hz, supply 5-34V (CMRR 120dB)
AD8397 - slew rate - 53V/us, noise 4.7nV/Hz, supply 3-24V (CMRR ~90dB)
AD8656 - slew rate - 11V/us, noise 2.7nV/Hz, supply 2.7-5.5V (CMRR 100dB)
OPA2365 - slew rate - 25V/us, noise 4.5nV/Hz, supply 2.2 - 5.5V (CMRR 100dB)
AD8022 - slew rate - 50V/us, noise 2.5nV/Hz, supply 5 - 24V (CMRR ~95dB)
AD8616 - slow rate - 12V/us, noise 8nV/Hz, supply 2.7 - 6V (CMRR 100dB)

danb1974 · 21st August 2008, 06:34 AM

For fun... get some schematics of audiophile grade cd players and have a look at what they use. You may be surprised

18th August 2008, 10:58 PM	#1
trodas diyAudio Member Join Date: Jun 2008	Best opamp for audio, operating at +5V only I have a dilema and I would like to hear your recommendation for best audio dual SOIC opamp, running at +5V only. Not much is there to choose from, but I'm sort of torn between these there: AD823 http://www.analog.com/en/amplifiers-...s/product.html LM4562 http://www.national.com/pf/LM/LM4562.html AD8397 http://www.analog.com/en/amplifiers-...s/product.html AD823 got a bad name for being too harsh and flat sounding (and hard to get one), LM4562 is picky a like to pick up interferences, not to mention still being a bit too much harsh/sharp ... (but I have few at hand) and I did not know much about AD8397, except that it could be get as sample easily. The opamp will be used as LineIn input opamp on my X-Fi. Replacing a MC33078 opamp. So, guys, are any of these even better that the TI original MC33078? And witch one would you recommend to install? __________________ "It is dangerous to be right in matters on which the established authorities are wrong." - Voltaire ...just keep folding, just keep folding... my config

21st August 2008, 12:44 AM	#4
trodas diyAudio Member Join Date: Jun 2008	Could be... how about these? AD826 - slew rate - 350V/us, noise 15nV/Hz, supply 5-36V (CMRR 80dB) AD823 - slew rate - 22Vus, noise 16nV/Hz, supply 3-36V (CMRR 75dB) LM4562 - slew rate - 20V/us, noise 2.7nV/Hz, supply 5-34V (CMRR 120dB) AD8397 - slew rate - 53V/us, noise 4.7nV/Hz, supply 3-24V (CMRR ~90dB) AD8656 - slew rate - 11V/us, noise 2.7nV/Hz, supply 2.7-5.5V (CMRR 100dB) OPA2365 - slew rate - 25V/us, noise 4.5nV/Hz, supply 2.2 - 5.5V (CMRR 100dB) AD8022 - slew rate - 50V/us, noise 2.5nV/Hz, supply 5 - 24V (CMRR ~95dB) AD8616 - slow rate - 12V/us, noise 8nV/Hz, supply 2.7 - 6V (CMRR 100dB) __________________ "It is dangerous to be right in matters on which the established authorities are wrong." - Voltaire ...just keep folding, just keep folding... my config

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20th August 2008, 05:51 AM	#2
linuxguru diyAudio Member Join Date: Sep 2007	LM4562 should win hands down on THD numbers and just about every specification. For sonics, you may also want to give the old TL062 micropower op-amp a listen - it will run on +/- 2.5v, but it's very close to the lower Vcc limit.

20th August 2008, 02:00 PM	#3
danb1974 diyAudio Member Join Date: Jul 2005 Location: Timisoara	How about opa2134? Anyway there is no universal best, just the one you like more how it sounds

21st August 2008, 06:34 AM	#5
danb1974 diyAudio Member Join Date: Jul 2005 Location: Timisoara	For fun... get some schematics of audiophile grade cd players and have a look at what they use. You may be surprised

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