Re: Choosing voltage opamp

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#2059

From: Vitaliy
Date: Sun, 24 Sep 2006 00:22

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I'm not sure if I'm answering my own question, but I can put 1MOhm at
the input of opamp to the ground.

Vitaliy

Vitaliy wrote:
> I've been trying to do that.
>
> In a lot of examples on the datasheets of amplifiers I'm looking for, I
> see they are using 50Ohm input. However, I know for sure (test results)
> that output of the first stage (photodiode amp) does not work with
> 50Ohm loads, but works with 1MOhm loads. Should I be concerned about
> that?
>
> Vitaliy
> >
> > All of the usual suspects (National, TI [including Burr-Brown], Linear
> > tech, AD and others) make devices specifically designed to drive 50 ohm
> > loads.
> >
> > Check out the websites and use the parametric search function and
> > specify 50 ohm load and then choose a suitable device. We don't know
> > what type of load that is beyond 50 ohm, so the above is the only
> > advice I can give.
> > 
> > Cheers
> > 
> > PeteS

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From: "Vitaliy" <vmykhayl@ee.ryerson.ca>
Newsgroups: sci.electronics.design,sci.electronics.basics,aus.electronics
Subject: Re: Choosing voltage opamp
Date: 23 Sep 2006 17:22:23 -0700
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