CS5467_07 Datasheet, PDF (1/46 Pages) Cirrus Logic – Four-channel Power / Energy IC

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
• 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 (25 ppm / °C typ.)
• Power Supply Monitor Function
• Three-wire Serial Interface to Microcontroller or
E²PROM
• Power Supply Configurations
GND: 0 V, VA+: +5 V, VD+: +3.3 V to +5 V
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 ∆Σ 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 Page 45.
VA+
RESET
VD+
IIN1+
IIN1-
PGA
VIN1+
VIIN1-
x10
IIN2+
IIN2-
PGA
VIN2+
VIN2-
VREFIN
VREFOUT
x10
x1
Voltage
Reference
AGND
http://www.cirrus.com
4th Order ∆Σ
Modulator
Digital
Filter
HPF
Option
2nd Order ∆Σ
Modulator
Digital
Filter
HPF
Option
4th Order ∆Σ
Modulator
Digital
Filter
HPF
Option
2nd Order ∆Σ
Modulator
Digital
Filter
HPF
Option
Power
Calculation
Engine
Serial
Interface
E-to-F
MODE
CS
SDI
SDO
SCLK
INT
E1
E2
E3
Calibration
Power
Monitor
PFMON
Temperature
Sensor
System
Clock
/K
Clock
Generator
XIN XOUT CPUCLK DGND
Copyright © Cirrus Logic, Inc. 2007
(All Rights Reserved)
MAR ‘07
DS714F1