Cirrus Logic Inc. CS5461A-ISZR

Description
The CS5461A is an integrated power measurement device that combines two AΣ analog-to-digital converters, a power calculation engine, an 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, RMS instantaneous power, apparent power, and active power for single-phase, 2- or 3-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
IAMS and VRMS
Apparent and active (real) power
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

Applications
Single-phase power metering
Energy monitoring
Power quality analysis
Motor control
Temperature sensing
Voltage sag detection