Description
The CS5461A is an integrated power measure ment device which combines two  ∆Σ analog-to-digital converters, power calculation engine, energy-to-frequency converter, and a serial interface on a single chip. It is designed to
accurately measure instantaneous current and voltage, and calculate VRMS, IRMS, instantaneous power, apparent power, and active power for single-phase, 2- or3-wire power metering applications.

FEATUREs
• Energy Data Linearity: ±0.1% of Reading over 1000:1 Dynamic Range
• On-chip Functions:
  - Instantaneous Voltage, Current, and Power
  - IRMSand VRMS, Apparent and Active (Real) Pow
  - Energy-to-pulse Conversion for Mechanical Counter/Stepper Motor Drive
  - System Calibrations and Phase Compensation
  - Temperature Sensor
- Voltage Sag Detect
• Meets Accuracy Spec for IEC, ANSI, & JIS.
• Low Power Consumption
• Current Input Optimized for Sense Resistor.
• GND-referenced Signals with Single Supply
• On-chip 2.5 V Reference (25 ppm/°C typ)
• Power Supply Monitor
• Simple Three-wire Digital Serial Interface
• “Auto-boot” Mode from Serial E2PROM.
• Power Supply Configurations:
  VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to +5 V