How do I correcty wire a power supply to a voltage buffer op-amp?

Thread Starter

Sycko

Joined Jul 11, 2019
23
Hey all!

I've been trying to test this Op-Amp I've got (model: LTC6268 datasheet is attached) and I have some doubts on how to correctly wire it up to a power supply.

I have a 2 channel power supply and I want to provide +2V and -2V to the positive and negative supply pins of the op amp.

How should i hook it up? Thanks to anyone that replies :)

upload_2019-8-2_14-6-52.jpeg
 

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BobTPH

Joined Jun 5, 2013
2,262
Connect the + supply to the positive supply pin, and the - supply to the negative supply pin, just like the example on the fist page of the datasheet.

Bob
 
Last edited:

Thread Starter

Sycko

Joined Jul 11, 2019
23
Hi bob and iimagine, thanks for your replies!

The thing that always confuses me is the GND, I'm never sure if both channels share the same GND.
Following iimagine's picture, would these be correct?

upload_2019-8-2_14-40-48.png


The reason I'm confused is because in a document I saw this layout below (although it its in a inverting configuration, while i want non-inverting)
upload_2019-8-2_14-42-55.png

So is my new drawing correct or do I need to connect something to the -IN ping of the Op-amp as a common reference?
 

crutschow

Joined Mar 14, 2008
24,380
As a general rule every component in a circuit needs a path (however convoluted) to common (gnd).
Thus you can't power an op amp from a supply that isn't connected to the op amp signal ground.
 
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