The CS5460A is a highly integrated power measurement

solution which combines two  

Analog-to-digital Converters (ADCs), high-speed

power calculation functions, and a serial interface

on a single chip. It is designed to accurately measure

and calculate: Real (True) Energy,

Instantaneous Power, IRMS, and VRMS for single

phase 2- or 3-wire power metering applications.

The CS5460A interfaces to a low-cost shunt resistor

or transformer to measure current, and to a

resistive divider or potential transformer to measure

voltage. The CS5460A features a

bi-directional serial interface for communication

with a microcontroller and a pulse output engine for

which the average pulse frequency is proportional

to the real power.