Measuring current with CSLA2CD

Hi people!
I’m a new user, and i want to ask you about a project i’m working on. I want to measuring AC current and send data to Arduino.
I need the formula to find out current csla2cd and How can Arduino reads the signal ??
Thanks so much, and sorry for the english translation, i’m italian!

Looks like you asked the same question on the Arduino forum where you got some helpful replies. There is also some discussion of this topic on the open energy monitor site. The part you have chosen is not one that is simple to use, so I would suggest the tutorial on the open energy monitor site to learn more about it. A hall effect sensor is great if you need to measure DC current, but it generally requires calibration which is usually not simple, unless you don’t care about accuracy.