The CS5461 is an integrated power measurement device which combines two ADCs, high speed power calculation functions, and a serial interface on a single chip. It is designed to accurately measure Instantaneous Current and Voltage, and calculate: Instantaneous Power, Average Power, IRMS, and VRMS, for single-phase 2- or 3-wire power metering applications. The CS5461 can interface to a low-cost shunt resistor or transformer for current measurement, and to a resistive divider or potential transformer for voltage measurement. The CS5461 features a bi-directional serial interface for communication with a micro-controller and a programmable energy-to-pulse output function. CS5461 has on-chip functionality to facilitate AC or DC system-level calibration. Additional features include on-chip temperature sensor, voltage sag detection, and phase compensation.