CS5464 Datasheet, PDF (1/46 Pages) Cirrus Logic – Three-channel, Single-phase Power/Energy IC

CS5464
Three-channel, Single-phase Power/Energy IC
Features
Description
• Energy Data Linearity: ±0.1% of Reading The CS5464 is an integrated power measure-
over 1000:1 Dynamic Range
ment device which combines three ∆Σ
• On-chip Functions:
- Instantaneous Voltage, Current, and Power
- I_RMS and V_RMS, Active, Reactive, and
Apparent Power
- Current Fault and Voltage Sag Detect
- System Calibrations / Phase Compensation
- Temperature Sensor
- Energy-to-pulse Conversion
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 V_RMS, I_RMS, instantaneous
power, active power, apparent power, and reac-
tive power for high-performance power
measurement applications.
- Positive-only Accumulation Mode
The CS5464 is optimized to interface to shunt re-
• Meets Accuracy Spec for IEC, ANSI, & JIS ^{sistors or current transformers for current}
• Low Power Consumption
measurement, and to resistive dividers or poten-
tial transformers for voltage measurement.
• Tamper Detection in 2-Wire Distribution
Systems
The CS5464 features a tamper detection
• GND-referenced Signals with Single Supply ^{scheme that uses the larger of the active power}
measurements to register energy. Additional fea-
• On-chip 2.5 V Reference (25 ppm/°C typ) _{tures include system-level calibration,}
• Power Supply Monitor
temperature sensor, voltage sag & current fault
• Simple Three-wire Digital Serial Interface ^{detection, and phase compensation.}
• “Auto-boot” Mode from Serial E²PROM.
• Power Supply Configurations
VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to +5 V
ORDERING INFORMATION
See Page 45.
VA+
RESET
VD+
IIN1+
IIN1-
PGA
IIN2+
IIN2-
PGA
VIN+
10x
VIN-
4th 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
VREFIN
VREFOUT
x1
Voltage
Reference
AGND
Power
Monitor
PFMON
Temperature
Sensor
System
Clock
/K
Clock
Generator
Calibration
XIN XOUT CPUCLK
DGND
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2006
(All Rights Reserved)
MAR ‘06
DS682PP1