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