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Amplifiers Simulation - LT Spice

Category: Hardware

Hello, I am interested to simulate my design having operational amplifiers mostly from Analog Devices. I found a software LT Spice. There are some questions in my mind before I start using LT Spice for my simulation. 

1- Is it possible to add 3rd party components from another manufacturer in the schematic and simulate all together ? 

2- How rich is the default library of LT Spice, do I also need to import Analog Devices components, or the library by default has plenty of components ? 

3- What about the license of LT Spice ? or there also exist a free version ?