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Cirrus Logic

CS5463 Datasheet Preview

CS5463 Datasheet

Single Phase / Bi-directional Power/Energy

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CS5463
Single Phase, Bi-directional Power/Energy IC
Features
Energy Data Linearity: ±0.1% of Reading
over 1000:1 Dynamic Range
On-chip Functions:
- Instantaneous Voltage, Current, and Power
- IRMS and VRMS, Apparent, Reactive, and Active
(Real) Power
- Active Fundamental and Harmonic Power
- Reactive Fundamental, Power Factor, and Line
Frequency
- Energy-to-pulse Conversion
- System Calibrations and Phase Compensation
- Temperature Sensor
Meets accuracy spec for IEC, ANSI, JIS.
Low Power Consumption
Current Input Optimized for Sense Resistor.
GND-referenced Signals with Single Supply
On-chip 2.5 V Reference (25 ppm/°C typ)
Power Supply Monitor
Simple Three-wire Digital Serial Interface
“Auto-boot” Mode from Serial E2PROM
Power Supply Configurations:
VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to +5 V
Description
The CS5463 is an integrated power measure-
ment device which combines two 
analog-to-digital converters, power calculation
engine, energy-to-frequency converter, and a
serial interface on a single chip. It is designed to
accurately measure instantaneous current and
voltage, and calculate VRMS, IRMS, instanta-
neous power, apparent power, active power, and
reactive power for single-phase, 2- or 3-wire
power metering applications.
The CS5463 is optimized to interface to shunt re-
sistors or current transformers for current
measurement, and to resistive dividers or poten-
tial transformers for voltage measurement.
The CS5463 features a bi-directional serial inter-
face for communication with a processor and a
programmable energy-to-pulse output function.
Additional features include on-chip functionality
to facilitate system-level calibration, temperature
sensor, voltage sag detection, and phase
compensation.
ORDERING INFORMATION:
See Page 45.
VA+ RESET
VD+
IIN+
PGA
IIN-
4th Order 
Modulator
Digital
Filter
HPF
Option
VREFIN
x1
Temperature
Sensor
VIN+
VIN-
x10
2nd Order 
Modulator
Digital
Filter
HPF
Option
VREFOUT
Voltage
Reference
Power
Monitor
System
Clock
/K
Clock
Generator
Power
Calculation
Engine
Serial
Interface
E-to-F
MODE
CS
SDI
SDO
SCLK
INT
E1
E2
E3
Calibration
AGND
PFMON
XIN XOUT CPUCLK
DGND
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved)
APR ‘11
DS678F3




Cirrus Logic

CS5463 Datasheet Preview

CS5463 Datasheet

Single Phase / Bi-directional Power/Energy

No Preview Available !

CS5463
TABLE OF CONTENTS
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Characteristics & Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4. Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Digital Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Voltage and Current Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Power Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Linearity Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.1 Voltage Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.2 Current Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 IIR Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3 High-pass Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4 Performing Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5 Energy Pulse Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.5.1 Active Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.5.2 Apparent Energy Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.5.3 Reactive Energy Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.5.4 Voltage Channel Sign Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.5.5 PFMON Output Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.5.6 Design Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.6 Sag and Fault Detect Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.7 No Load Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.8 On-chip Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.9 Voltage Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.10 System Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.11 Power-down States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.12 Oscillator Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.13 Event Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.13.1 Typical Interrupt Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.14 Serial Port Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.14.1 Serial Port Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.15 Register Paging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.16 Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.16.1 Start Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.16.2 SYNC0 and SYNC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.16.3 Power-up/Halt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.16.4 Power-down and Software Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.16.5 Register Read/Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.16.6 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6. Register Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1 Page 0 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1.1 Configuration Register ( Config ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1.2 Current and Voltage DC Offset Register ( IDCoff , VDCoff ) . . . . . . . . . . . . 27
6.1.3 Current and Voltage Gain Register ( Ign , Vgn ) . . . . . . . . . . . . . . . . . . . . 27
6.1.4 Cycle Count Register ( Cycle Count ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1.5 PulseRateE Register ( PulseRateE ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1.6 Instantaneous Current, Voltage, and Power Registers ( I , V , P ) . . . . . . 28
2 DS678F3


Part Number CS5463
Description Single Phase / Bi-directional Power/Energy
Maker Cirrus Logic
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CS5463 Datasheet PDF






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