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CS5467
Four-channel Power/Energy IC
Features & Description
? Energy Linearity: ±0.1% of Reading over 1000:1
Dynamic Range
? On-chip Functions:
Description
The CS5467 is a watt-hour meter on a chip. It
measures line voltage and current and calcu-
lates active, reactive, apparent power, energy,
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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
power factor, and RMS voltage and current.
An internal RMS voltage reference can be used
if voltage measurement is disabled by
tampering.
Four ?? analog-to-digital converters are used to
measure two voltages and two currents. Option-
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Meets Accuracy Spec for IEC, ANSI, & JIS
Low Power Consumption
Voltage Tamper Correction
Ground-referenced Inputs with Single Supply
ally, voltage2 channel can be used for
temperature measurement.
The CS5467 is designed to interface to a variety
of voltage and current sensors.
? 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
Additional features include system-level calibra-
tion, voltage sag and current fault detection,
peak detection, phase compensation, and ener-
gy pulse outputs.
ORDERING INFORMATION
VA+
RESET
VD+
IIN1+
IIN1-
PGA
4th Order ??
Modulator
Digital
Filter
HPF
Option
MODE
CS
SDI
VIN1+
VIIN1-
x10
2nd Order ??
Modulator
Digital
Filter
HPF
Option
Serial
Interface
SDO
SCLK
Power
Calculation
INT
IIN2+
IIN2-
VIN2+
VIN2-
PGA
x10
4th Order ??
Modulator
2nd Order ??
Modulator
Digital
Filter
Digital
Filter
HPF
Option
HPF
Option
Engine
E-to-F
Calibration
E1
E2
E3
VREFIN
x1
VREFOUT
Voltage
Reference
AGND
Power
Monitor
PFMON
Temperature
Sensor
System
Clock
/K
XIN
Clock
Generator
XOUT CPUCLK
DGND
Copyright ? Cirrus Logic, Inc. 2011
JAN ‘11
(All Rights Reserved)
DS714F3
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