hi,
Join the free Yahoo LTSpice user group, all the AD534 models are there.
https://groups.yahoo.com/neo/groups/LTspice/files/ Lib/AD534/

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hi,
I am trying to use ad534 using pspice simulator can someone help me with library file or guide me how to go about it.

 

Look LTwiki.org
AND
http://ltwiki.org/index.php5?title=Components_Library_and_Circuits
There is a large collection of models and symbols to them.