Re: Necessity of ir isolation

From: leyk0004 (leyk0004_at_yahoo.com)
Date: 2001-12-14 23:51:17


Hello. Sorry for an unrelated question, but i was wondering what was
the reason for choosing INA114 for an instrumenation amplifier? For
example, INA141 and INA129 have a 117/120db CMRR instead of 110db and
draw less current.
Thanks, Michael

--- In buildcheapeeg_at_yahoogroups.com, "sleeper75se" <sleeper75se_at_yahoo.se> wrote:
> --- In buildcheapeeg_at_yahoogroups.com, "Joerg Hansmann" <info_at_jhansmann.de> wrote:
>
> Hello Joerg,
>
> > IMO this is a bad idea. It will introduce 18uV p-p noise due to
> > the drop of INA114 18pA p-p input noise current (for
simplification
> > over a frequency range from 0.1 to 10Hz) over the two 470k
> protection
> > resistors.



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