PSN-L Email List Message

Subject: Op amp front end noise
From: John Popelish jpopelish@........
Date: Wed, 09 Mar 2005 20:57:24 -0500


I am getting pretty deeply into the design process for a velocity coil
seismometer amplifier and filter and have decided to try ot quantify
the relative noise performance of various candidate opamps versus coil
resistance.  Here is the list of low noise and general purpose types
(which I have on hand) that I am comparing:

AD706
AD708
AD820
AD822
ICL6750S
LF411
LMC6062
LMC6462
LMC6482
LT1007
LI1115
LT1124
LT1128
LT1677
LT1047
LTC1051
LTC1151
MAX400
MAX410
MAX420
MAX427
MAX430
MCP6022
OP07
OP177
OP2604
OP27
OP97

Do you have any suggestions for other candidates I might evaluate?

My biggest difficulty in completing this task has been resolving the
wide variation in noise specifications for the various types to
produce a valid comparison in the DC to 10 Hz frequency range,
especially comparing the chopper types to the others.

-- 
John Popelish
__________________________________________________________

Public Seismic Network Mailing List (PSN-L)


[ Top ] [ Back ] [ Home Page ]