🚀 go-pugleaf

Mike McCarty wrote in message <8alnpa$pki$1@relay1.dsccc.com>...
>In article <8alm5q$g85$1@copland.udel.edu>,
>Ron Dozier <dozier@copland.udel.edu> wrote:
>)In article <89smse$fkl$1@news.cz.js.cn>, peter <asdc@bigfoot.com> wrote:
>)>Hi,can anyone tell me what's the general difference between
>)>instrumental amplifier and operational amplifier? what kind
>)>of application does each amplifier designed for?what kind of behaviors or
>)>characters we could expect when using them in application
>)>
>)
>)I'll tak a stab at this question.  An instrumentation amp geneally
>)amplifies the differnece between it's inputs in the presence of a large
>)common mode signal. They may have an extremely low bandwith.
>
>This is good.
>
>)
>)An operational amplifier on the other hand is a general purpose building
>)block and is single ended.
>
>This is wrong.
>
>)A typical use for an IA is thermocouple signal conditioning or bridge
>)amplifier and data acquisition where ground loops are a problem.
>)>
>)
>)Ron
>)
>
>
>The difference between an op-amp and an instrumentation amp is quite
>simple: an instrumentation amp is an optimized op-amp. It is normally
>built out of more than one op amp. It provides
>
> low leakage
> low offset
> low drift (with temperature and time)
> high common-mode rejection
>
>That's about it.

Don't forget that an instrumentation amp is designed to provide known gain
whereas an op-amp is merely designed to provide extremely high gain.