I am building a mercury-cup tiltmeter and it uses the INA121 opamp. I would
be interested in seeing your analysis of it's noise also.

At 08:57 PM 3/9/05 -0500, you wrote:
>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
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George
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