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Article #7433Re: Need analog opto-isolator or equiv.
From: Larry Lippman
Date: Tue, 25 Sep 1990 03:15
Date: Tue, 25 Sep 1990 03:15
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In article <222@nachos.SSESCO.com>, elmquist@nachos.SSESCO.com (Chris Elmquist) writes:
> Does anyone have a nifty circuit that will replicate a 0v to 5v DC
> signal across an opto-isolated path..?? I need to read a meter
> in a hostile environment with an A/D in a PC. I don't want the
> PC to get near this meter... this meter will be read, maybe, 10 or
> 15 times a second so frequency response is not critical...
> ...
> Any ideas would be appreciated.
Use an "isolation amplifier" specifically designed for this
purpose, such as one manufactured by Analog Devices, Burr-Brown, etc.
You can probably obtain an encapsulated device providing 1,000 volt
isolation for as little as $ 25.00 in small quanitites.
My advice is to not even think of designing your own analog
isolation circuit for a one-of-a-kind application.
Larry Lippman @ Recognition Research Corp. "Have you hugged your cat today?"
VOICE: 716/688-1231 {boulder, rutgers, watmath}!ub!kitty!larry
FAX: 716/741-9635 {utzoo, uunet}!/ \aerion!larry
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!kitty!larry From: larry@kitty.UUCP (Larry Lippman) Newsgroups: sci.electronics Subject: Re: Need analog opto-isolator or equiv. Summary: Isolation amplifiers... Message-ID: <4054@kitty.UUCP> Date: 25 Sep 90 03:15:10 GMT References: <222@nachos.SSESCO.com> Organization: Recognition Research Corp., Clarence, NY Lines: 20