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Description
The CS5464 is a watt-hour meter on a chip. It measures line voltage and current and calcu- lates active, reactive, apparent power, energy, power factor, and RMS voltage and current.
There are two separate inputs to measure line, ground, and/or neutral current enabling the me- ter to detect tampering and to continue operating. An internal RMS voltage reference can be used if voltage measurement is disabled by tampering.
Four ΔΣ analog-to-digital converters are used to
measure voltage, two currents, and temperature.
The CS5464 is designed to interface to a variety of voltage and current sensors.
Additional features include system-level calibra- tion, voltage sag and current fault detection, peak detection, phase compensation, and ener- gy pulse outputs.
ORDERING INFORMATION
See Page 44.

Features
.Energy Linearity: +0.1% of Reading over 1000: 1 Dynamic Range
.On-chip Functions:
- Voltage and Current Measurement
- Active, Reactive, and Apparent Power/Energy
- RMS Voltage and Current Calculations
- Current Fault and Voltage Sag Detection
- Calibration
- Phase Compensation
- Temperature Sensor
- Energy Pulse Outputs
.Meets Accuracy Spec for IEC, ANSI, & JIS
.Low Power Consumption
.Tamper Detection and Correction
Ground-referenced Inputs with Single Supply
 On-chip 2.5 V Reference (40 ppm /C typ.)
.Power Supply Monitor Function
.Three-wire Serial Interface to Microcontroller or EPROM
.Power Supply Configurations GND: 0 V, VA+: +5 V, VD+: +3.3 V to +5 V