Opa547 datasheet questions

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So if we have a Opamp component, do we have to give the input as sine wave or as a dc supply? I think it has to be at a DC voltage. please correct me.
Thanks in Advance
Lakshmi
 
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Re: Opa547

Most opamps will amplify a sinusoidal or dc signal.
 
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Re: Opa547

So I can get a constant OUTPUT DC current with this opamp rt?
 
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Reading a datasheet

Hi I need to understand few things about the Datasheet. I want to know what the input voltages for the pins vIN+ and VIN-could be. Please find teh enclosed datasheet for reference. I need it very urgently for a project.
Thank you in advance
Kari
 

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uart

Science Advisor
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Re: Reading a datasheet

Look at the item marked "common mode voltage range" in the datasheet.
 
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Re: Reading a datasheet

I reffered to it but, what do they mean by saying the following there? (V+) –3
 

berkeman

Mentor
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(I merged the two related threads into one -- both were about the opamp datasheet)
 

Redbelly98

Staff Emeritus
Science Advisor
Homework Helper
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i really dont understand why they are on the same subject. one is about the circuit the other is about reading the data sheet for the component.

<< post edited by berkeman to clean up txt speak >>
 
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Re: Reading a datasheet

I reffered to it but, what do they mean by saying the following there? (V+) –3
ideally, you want an op-amp to amplify only the difference between Vin+ and Vin-, not to amplify the average of Vin+ and Vin-. the higher the common mode rejection ratio, the closer you are to this ideal. to get the best rated performance for this op-amp, keep the inputs between (V-) - 0.1, and (V+) -3V.
 

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