I am trying to use the Cirrus Logic CS5466 to calculate power usage in household electronics. I am using the basic circuit shown on page 14 of the 5466 datasheet:

http://www.cirrus.com/en/pubs/proDatasheet/CS5466_F1.pdf

Since I don't have a strong background in electronics can anyone help choose the correct resistors and caps for the voltage divider and current sense (shunt) circuits that are used as inputs. A standard house, of course, has 120V AC, 20 amp, 60Hz circuits.

Any help with choosing these values would be appreciated. Or even how to connect transformers here instead.

 

i will refer you to out forum ebooks volumes: volume 1 - DC. just scroll all the way down of this page

moz

 

It really doesn't explain the purpose of the Capacitors in the circuit diagram I have. Is there a reference which will better explain this?

 

cvrider,

I don't really understand the input capacitors well, but I am guessing that the cap across the inputs help compensate for mismatches of Rin and Cin, which I suspect are used to create a first-order lowpass.

You should use the recommended values given in the eval. board datasheet, follow the schematics

http://www.cirrus.com/en/pubs/rdDatasheet/CDB5466U_DB1.pdf

Steve

 

Looking at the eval board schematic is a great idea. Thanks.