Cirrus Logic CS5464 - Manual

Copyright
 Cirrus Logic, Inc. 2011
(All Rights Reserved) http://www.cirrus.com
CS5464
Three-channel, Single-phase Power/Energy IC
Features & Description
• 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 E
2
PROM
• Power Supply Configurations
GND: 0 V, VA+: +5 V, VD+: +3.3 V to +5 V
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
 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 .
APR ‘11
DS682F3