CS5467
Four-channel 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
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,
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-
ally, voltage2 channel can be used for
temperature measurement.
The CS5467 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
Meets Accuracy Spec for IEC, ANSI, & JIS
Low Power Consumption
Voltage Tamper 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
•
•
•
•
•
•
•
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
Power
Calculation
Engine
Serial
Interface
SDO
SCLK
INT
E1
E2
E3
IIN2+
IIN2-
PGA
4th Order
Modulator
Digital
Filter
HPF
Option
E-to-F
VIN2+
VIN2-
x10
2nd Order
Modulator
Digital
Filter
HPF
Option
Calibration
VREFIN
x1
Voltage
Reference
AGND
Power
Monitor
Temperature
Sensor
System
Clock
/K
Clock
Generator
VREFOUT
PFMON
XIN
XOUT CPUCLK
DGND
Copyright
Cirrus Logic, Inc. 2011
(All Rights Reserved)
JAN ‘11
DS714F3
CIRRUS [ CIRRUS LOGIC ]
