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ADE7933 반도체 회로 부품 판매점

Isolated Energy Metering Chipset



Analog Devices 로고
Analog Devices
ADE7933 데이터시트, 핀배열, 회로
Data Sheet
Isolated Energy Metering Chipset
for Polyphase Shunt Meters
ADE7978/ADE7933/ADE7932
FEATURES
Enables shunt current sensors in polyphase energy meters
Immune to magnetic tampering
Highly accurate; supports EN 50470-1, EN 50470-3,
IEC 62053-21, IEC 62053-22, IEC 62053-23, ANSI C12.20,
and IEEE 1459 standards
Compatible with 3-phase, 3- or 4-wire (delta or wye) meters
and other 3-phase services
Computes active, reactive, and apparent energy on each
phase and on the overall system
Less than 0.2% error in active and reactive energy over
a dynamic range of 2000 to 1 at TA = 25°C
Less than 0.1% error in voltage rms over a dynamic range
of 500 to 1 at TA = 25°C
Less than 0.25% error in current rms over a dynamic range
of 500 to 1 at TA = 25°C
Power quality measurements including THD
Single 3.3 V supply
Operating temperature: −40°C to +85°C
Flexible I2C, SPI, and HSDC serial interfaces
Safety and regulatory approvals (pending)
UL recognition
5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
IEC 61010-1: 400 V rms
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 846 V peak
APPLICATIONS
Shunt-based polyphase meters
Power quality monitoring
Solar inverters
Process monitoring
Protective devices
Isolated sensor interfaces
Industrial PLCs
TYPICAL APPLICATION CIRCUIT
PHASE PHASE PHASE
NEUTRAL
A
B
C
ISOLATION
BARRIER
V1P
VM
IM PHASE A
ADE7932/
IP ADE7933
V2P
3.3V
GNDISO_A
GNDMCU
V1P
VM
IM PHASE B
ADE7932/
IP ADE7933
V2P
3.3V
GNDISO_B
GNDMCU
V1P
VM
IM PHASE C
ADE7932/
IP ADE7933
V2P
3.3V
ADE7978
ENERGY
METERING
IC
3.3V
I2C/HSDC OR SPI
IRQ0, IRQ1
GNDMCU
3.3V
GNDMCU
LOAD
GNDISO_C
GNDMCU
V1P
VM NEUTRAL
IM
LINE
ADE7932/
ADE7933
IP (OPTIONAL)
V2P
3.3V
GNDISO_N
GNDMCU
EARTH
Figure 1. 3-Phase, 4-Wire Meter with Four ADE7933/ADE7932 Devices and One ADE7978
1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329; 6,262,600; 7,489,526; and 7,558,080. Other patents are pending.
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


ADE7933 데이터시트, 핀배열, 회로
ADE7978/ADE7933/ADE7932
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Typical Application Circuit ............................................................. 1
Revision History ............................................................................... 3
General Description ......................................................................... 4
Functional Block Diagrams............................................................. 5
Specifications..................................................................................... 7
System Specifications, ADE7978 and ADE7933/ADE7932 ... 7
ADE7978 Specifications .............................................................. 9
ADE7933/ADE7932 Specifications.......................................... 13
Absolute Maximum Ratings.......................................................... 16
Thermal Resistance .................................................................... 16
ESD Caution................................................................................ 16
Pin Configurations and Function Descriptions ......................... 17
Typical Performance Characteristics ........................................... 21
Test Circuit ...................................................................................... 26
Terminology .................................................................................... 27
Theory of Operation ...................................................................... 30
ADE7933/ADE7932 Analog Inputs......................................... 30
Analog-to-Digital Conversion.................................................. 30
Current Channel ADC............................................................... 32
Voltage Channel ADCs.............................................................. 35
Changing the Phase Voltage Datapath .................................... 39
Reference Circuits ...................................................................... 39
Phase Compensation.................................................................. 40
Digital Signal Processor............................................................. 41
Power Quality Measurements ....................................................... 42
Zero-Crossing Detection........................................................... 42
Period Measurement.................................................................. 44
Phase Voltage Sag Detection ..................................................... 45
Peak Detection ............................................................................ 46
Overvoltage and Overcurrent Detection................................. 47
Neutral Current Mismatch........................................................ 48
Root Mean Square Measurement ................................................. 49
Current RMS Calculation.......................................................... 49
Voltage RMS Calculation .......................................................... 50
Voltage RMS in Delta Configurations ..................................... 51
Data Sheet
Active Power Calculation .............................................................. 52
Total Active Power Calculation ................................................ 52
Fundamental Active Power Calculation.................................. 53
Active Power Gain Calibration................................................. 53
Active Power Offset Calibration............................................... 54
Sign of Active Power Calculation............................................. 54
Active Energy Calculation ........................................................ 54
Integration Time Under Steady Load ...................................... 55
Energy Accumulation Modes ................................................... 56
Line Cycle Active Energy Accumulation Mode ..................... 56
Reactive Power Calculation .......................................................... 58
Total Reactive Power Calculation ............................................ 58
Fundamental Reactive Power Calculation .............................. 58
Reactive Power Gain Calibration ............................................. 58
Reactive Power Offset Calibration ........................................... 58
Sign of Reactive Power Calculation ......................................... 59
Reactive Energy Calculation..................................................... 59
Integration Time Under Steady Load ...................................... 60
Energy Accumulation Modes ................................................... 61
Line Cycle Reactive Energy Accumulation Mode ................. 61
Apparent Power Calculation ......................................................... 62
Apparent Power Gain Calibration............................................ 62
Apparent Power Offset Calibration ......................................... 62
Apparent Power Calculation Using VNOM ........................... 62
Apparent Energy Calculation ................................................... 63
Integration Time Under Steady Load ...................................... 64
Energy Accumulation Mode..................................................... 64
Line Cycle Apparent Energy Accumulation Mode................ 64
Power Factor Calculation and Total Harmonic
Distortion Calculation ................................................................... 65
Power Factor Calculation .......................................................... 65
Total Harmonic Distortion Calculation.................................. 66
Waveform Sampling Mode............................................................ 67
Energy-to-Frequency Conversion................................................ 68
TERMSELx[2:0] Bits.................................................................. 68
CFxSEL[2:0] Bits ........................................................................ 68
Energy-to-Frequency Conversion Process ............................. 69
Rev. 0 | Page 2 of 120




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