Description
   The CS5461 is an integrated power measurement device which combines two ∆Σ 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. 

FEATUREs
● Energy Data Linearity: ±0.1% of Reading
   over 1000:1 Dynamic Range
● On-Chip Functions: Energy, I ∗ V,
   IRMS and VRMS, Energy-to-Pulse Conversion
● AC/DC System Calibrations
● Meets Accuracy Spec for IEC 687/1036, JIS
● Power Consumption <12 mW
● On-Chip Temperature Sensor
● Voltage Sag Detect
● Adjustable Input Range on Current Channel
● Phase Compensation
● GND-Referenced Signals with Single Supply
● On-chip 2.5 V Reference (25 ppm/°C typ)
● Simple Three-Wire Digital Serial Interface
● Power Supply Monitor
● Interface Optimized for Shunt Sensor
● Mechanical Counter/Stepper Motor Drive
● Smart “Auto-Boot” Mode from Serial
   EEPROM with no microcontroller.
● Power Supply Configurations
   VA+ = +5 V; VA- = 0 V; VD+ = +3.3 V to +5 V