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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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