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TI Home » TI E2E Community » Support Forums » Amplifiers » Precision Amplifiers » Precision Amplifiers Forum » Instrumentation Amplifier Output Offset
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Instrumentation Amplifier Output Offset

Instrumentation Amplifier Output Offset

This question is answered
Jim Gealy
Posted by Jim Gealy
on Jul 09 2009 16:26 PM
Prodigy20 points

Greetings,

I am building a very simple circuit.  I need to take a 0V to 1V signal and produce a -5V to 5V signal.  I would like to do this with one of the INA series instrumentation amplifiers.  I feel it would be easiest to have one of these units produce a gain of 10 and then offset the signal by 5V.  Can this be accomplished by connecting a -5V reference sourse, i.e. a negative linear regulator, to the reference pin of the amplifier in order to bring the signal down or should I simply ground the reference pin and connect the output to a difference amplifier with unity gain?  Thanks in advance for the help!

-jim

Amplifier instrumentation amplifier amp bias op amp offset voltage
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  • Matt Hann
    Posted by Matt Hann
    on Jul 09 2009 17:25 PM
    Verified Answer
    Verified by Matt Hann
    Expert7120 points

    Jim,

    I think your first idea of connecting a -5V source to the reference pin with the INA configured in a gain of 10 would be the best way to go about this. 

    Matt

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  • Jim Gealy
    Posted by Jim Gealy
    on Jul 09 2009 21:31 PM
    Prodigy20 points

    Matt,

    Thanks!  I just wanted to make sure that I wasn't crazy in thinking that I could do that!

    -jim

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