Hi Chai,
Apologies for the delay of response. The application note for AD8215 can be found on page 11 of its datasheets. What is your specific application? I might still suggests some useful technical notes depending on your applications.
For the simulation tool, AD8215 doesn't have a spice model but you can actually use the spice model of the AD8211 since they have pretty much the same performance and specifications. The main difference between the two is their package type. AD8215 comes with SOIC while AD8211 is in SOT-23 package. So you may to download our free NI Multisim ADI Edition to simulate your application circuits but take note that the free license of this will expire until May 31 2014 only.
You can download it here: http://www.analog.com/en/amplifier-linear-tools/multisim/topic.html
I hope this helps!
Thanks and best regards,
Emman