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The quietest audio op-amp with ultra-low THD

by Eeyore <rabbitsfriendsandrelations@[EMAIL PROTECTED] > Sep 21, 2008 at 08:35 PM

National's LME49710/20/40 amd LM4562 seem to have the best figures at
2.5nV/sqrt Hz but in a practical circuit I found the venerable NE5534
with its 3.5 nV/sqrt Hz was quieter, presumably due to lower input noise
current in that particular configuration.

The LMEs also have insanely low THD
RL = 600ohms  0.00003% (typ)

http://www.national.com/pf/LM/LME49710.html
http://www.national.com/pf/LM/LM4562.html

Does anyone know of anything better without sacrificing unity gain
stability or THD ?

Graham

55 Posts in Topic:

The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-21 20:35:49

Re: The quietest audio op-amp with ultra-low THD

Phil Hobbs <pcdhSpamMe

2008-09-21 16:39:34

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-21 21:55:34

Re: The quietest audio op-amp with ultra-low THD

John Larkin <jjlarkin@

2008-09-21 14:34:31

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 00:56:33

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 21:46:19

Re: The quietest audio op-amp with ultra-low THD

John Larkin <jjlarkin@

2008-09-22 19:33:09

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 08:01:45

Re: The quietest audio op-amp with ultra-low THD

John Larkin <jjlarkin@

2008-09-23 07:01:18

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 16:25:28

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-23 18:58:57

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 20:08:31

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-23 21:39:53

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 20:43:33

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-23 21:47:50

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 23:39:45

Re: The quietest audio op-amp with ultra-low THD

Phil Hobbs <pcdhSpamMe

2008-09-21 21:33:54

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 02:59:44

Re: The quietest audio op-amp with ultra-low THD

Phil Hobbs <pcdhSpamMe

2008-09-22 20:28:28

Re: The quietest audio op-amp with ultra-low THD

Les Matthew <lesmcdm@[

2008-09-22 17:16:50

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 17:58:19

Re: The quietest audio op-amp with ultra-low THD

Les Matthew <lesmcdm@[

2008-09-22 20:01:50

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-22 21:40:45

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 00:10:18

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-23 01:53:48

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 02:51:47

Re: The quietest audio op-amp with ultra-low THD

Les Matthew <lesmcdm@[

2008-09-23 11:18:03

Re: The quietest audio op-amp with ultra-low THD

Les Matthew <lesmcdm@[

2008-09-23 11:16:18

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 22:03:43

Re: The quietest audio op-amp with ultra-low THD

Les Matthew <lesmcdm@[

2008-09-23 11:19:54

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 00:06:55

Re: The quietest audio op-amp with ultra-low THD

Les Matthew <lesmcdm@[

2008-09-23 11:22:25

Re: The quietest audio op-amp with ultra-low THD

ggherold@[EMAIL PROTECTED

2008-09-22 09:31:53

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 18:04:00

Re: The quietest audio op-amp with ultra-low THD

Joerg <notthisjoergsch

2008-09-22 10:13:30

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 18:23:22

Re: The quietest audio op-amp with ultra-low THD

ggherold@[EMAIL PROTECTED

2008-09-22 18:12:12

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 02:44:51

Re: The quietest audio op-amp with ultra-low THD

ggherold@[EMAIL PROTECTED

2008-09-23 07:24:09

Re: The quietest audio op-amp with ultra-low THD

ggherold@[EMAIL PROTECTED

2008-09-23 08:11:05

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 16:27:27

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-23 16:30:48

Re: The quietest audio op-amp with ultra-low THD

"john jardine"

2008-09-21 21:51:38

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-21 23:19:38

Re: The quietest audio op-amp with ultra-low THD

"BobW" <nimb

2008-09-21 14:34:00

Re: The quietest audio op-amp with ultra-low THD

"john jardine"

2008-09-21 22:40:53

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-21 23:51:59

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 01:00:26

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 00:58:08

Re: The quietest audio op-amp with ultra-low THD

Joerg <notthisjoergsch

2008-09-22 10:18:51

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-22 20:58:16

Re: The quietest audio op-amp with ultra-low THD

Joerg <notthisjoergsch

2008-09-22 13:02:48

Re: The quietest audio op-amp with ultra-low THD

Martin Griffith <mart_

2008-09-22 22:18:20

Re: The quietest audio op-amp with ultra-low THD

mrdarrett@[EMAIL PROTECTE

2008-09-22 11:17:13

Re: The quietest audio op-amp with ultra-low THD

Eeyore <rabbitsfriends

2008-09-22 21:18:55

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