CS5461A Datasheet, PDF (1/41 Pages) Cirrus Logic – Single Phase, Bi-directional Power/Energy IC

CS5461A
Single Phase, Bi-directional Power/Energy IC
Features
Description
• Energy Data Linearity: ±0.1% of Reading over The CS5461A is an integrated power measure-
1000:1 Dynamic Range
ment device which combines two ∆Σ
• On-chip Functions:
analog-to-digital converters, power calculation
- Instantaneous Voltage, Current, and Power
engine, energy-to-frequency converter, and a
- I_RMS and V_RMS, Apparent and Active (Real) Power
- Energy-to-pulse Conversion for Mechanical
Counter/Stepper Motor Drive
- System Calibrations and Phase Compensation
serial interface on a single chip. It is designed to
accurately measure instantaneous current and
voltage, and calculate V_RMS, I_RMS, instanta-
neous power, apparent power, and active power
for single-phase, 2- or 3-wire power metering
- Temperature Sensor
applications.
- Voltage Sag Detect
• Meets Accuracy Spec for IEC, ANSI, & JIS.
The CS5461A is optimized to interface to shunt
resistors or current transformers for current mea-
• Low Power Consumption
surement, and to resistive dividers or potential
• Current Input Optimized for Sense Resistor.
transformers for voltage measurement.
• 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.
The CS5461A features a bi-directional serial in-
terface for communication with a processor, and
a programmable energy-to-pulse output func-
tion. Additional features include on-chip
functionality to facilitate system-level calibration,
temperature sensor, voltage sag detection, and
phase compensation.
• Power Supply Configurations:
VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to +5 V
ORDERING INFORMATION:
See Page 41.
VA+
RESET
VD+
IIN+
PGA
IIN-
VREFIN
x1
4th Order ∆Σ
Modulator
Digital
Filter
HPF
Option
Temperature
Sensor
Power
Calculation
Engine
Serial
Interface
VIN+
VIN-
x10
2nd Order ∆Σ
Modulator
VREFOUT
Voltage
Reference
Power
Monitor
AGND
PFMON
Digital
Filter
HPF
Option
System
Clock
/K
Clock
Generator
Calibration
XIN XOUT CPUCLK
DGND
E-to-F
MODE
CS
SDI
SDO
SCLK
INT
E1
E2
E3
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Copyright © Cirrus Logic, Inc. 2005
(All Rights Reserved)
AUG ‘05
DS661F1