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ADE7880 の電気的特性と機能
ADE7880のメーカーはAnalog Devicesです、この部品の機能は「Polyphase Multifunction Energy Metering IC」です。 |
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製品の詳細 ( Datasheet PDF )
部品番号 ADE7880 |
部品説明 Polyphase Multifunction Energy Metering IC |
メーカ Analog Devices |
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Data Sheet
Polyphase Multifunction Energy Metering IC
with Harmonic Monitoring
ADE7880
FEATURES
Highly accurate; supports IEC 62053-21, IEC 62053-22,
IEC 62053-23, EN 50470-1, EN 50470-3, ANSI C12.20, and
IEEE1459 standards
Supports IEC 61000-4-7 Class I and Class II accuracy
specification
Compatible with 3-phase, 3-wire or 4-wire (delta or wye),
and other 3-phase services
Supplies rms, active, reactive, and apparent powers, power
factor, THD, and harmonic distortion of all harmonics
within 2.8 kHz pass band on all phases
Supplies rms and harmonic distortions of all harmonics
within 2.8 kHz pass band on neutral current
Less than 1% error in harmonic current and voltage rms,
harmonic active and reactive powers over a dynamic
range of 2000 to 1 at TA = 25°C
Supplies total (fundamental and harmonic) active and
apparent energy and fundamental active/reactive energy
on each phase and on the overall system
Less than 0.1% error in active and fundamental reactive
energy over a dynamic range of 1000 to 1 at TA = 25°C
Less than 0.2% error in active and fundamental reactive
energy over a dynamic range of 5000 to 1 at TA = 25°C
Less than 0.1% error in voltage and current rms over a
dynamic range of 1000 to 1 at TA = 25°C
Battery supply input for missing neutral operation
Wide supply voltage operation: 2.4 V to 3.7 V
Reference: 1.2 V (drift 20 ppm/°C typical) with external
overdrive capability
40-lead lead frame chip scale package (LFCSP), Pb-free, pin-
for-pin compatible with ADE7854, ADE7858, ADE7868 and
ADE7878
APPLICATIONS
Energy metering systems
Power quality monitoring
Solar inverters
Process monitoring
Protective devices
GENERAL DESCRIPTION
The ADE78801 is a high accuracy, 3-phase electrical energy
measurement IC with serial interfaces and three flexible pulse
outputs. The ADE7880 device incorporates second-order sigma-
delta (Σ-Δ) analog-to-digital converters (ADCs), a digital
integrator, reference circuitry, and all of the signal processing
required to perform the total (fundamental and harmonic) active,
and apparent energy measurements, rms calculations, as well as
fundamental-only active and reactive energy measurements. In
addition, the ADE7880 computes the rms of harmonics on the
phase and neutral currents and on the phase voltages, together
with the active, reactive and apparent powers, and the power
factor and harmonic distortion on each harmonic for all phases.
Total harmonic distortion (THD) is computed for all currents
and voltages. A fixed function digital signal processor (DSP)
executes this signal processing. The DSP program is stored in
the internal ROM memory.
The ADE7880 is suitable for measuring active, reactive, and
apparent energy in various 3-phase configurations, such as wye
or delta services with, both, three and four wires. The ADE7880
provides system calibration features for each phase, that is, rms
offset correction, phase calibration, and gain calibration. The
CF1, CF2, and CF3 logic outputs provide a wide choice of
power information: total active powers, apparent powers, or the
sum of the current rms values, and fundamental active and
reactive powers.
The ADE7880 contains waveform sample registers that allow
access to all ADC outputs. The devices also incorporate power
quality measurements, such as short duration low or high
voltage detections, short duration high current variations, line
voltage period measurement, and angles between phase voltages
and currents. Two serial interfaces, SPI and I2C, can be used to
communicate with the ADE7880. A dedicated high speed
interface, the high speed data capture (HSDC) port, can be used
in conjunction with I2C to provide access to the ADC outputs
and real-time power information. The ADE7880 also has two
interrupt request pins, IRQ0 and IRQ1, to indicate that an enabled
interrupt event has occurred. Three specially designed low power
modes ensure the continuity of energy accumulation when the
ADE7880 is in a tampering situation. The ADE7880 is available
in the 40-lead LFCSP, Pb-free package, pin-for-pin compatible
with ADE7854, ADE7858, ADE7868, and ADE7878 devices.
1 Protected by U.S. Patent 8,010,304 B2. Other patents pending.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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 ©2011–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 Page


ADE7880
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 3
Functional Block Diagram .............................................................. 4
Specifications..................................................................................... 5
Timing Characteristics ................................................................ 8
Absolute Maximum Ratings.......................................................... 11
Thermal Resistance .................................................................... 11
ESD Caution................................................................................ 11
Pin Configuration and Function Descriptions........................... 12
Typical Performance Characteristics ........................................... 14
Test Circuit ...................................................................................... 19
Terminology .................................................................................... 20
Power Management........................................................................ 21
PSM0—Normal Power Mode (All Parts)................................ 21
PSM1—Reduced Power Mode.................................................. 21
PSM2—Low Power Mode ......................................................... 21
PSM3—Sleep Mode (All Parts) ................................................ 22
Power-Up Procedure.................................................................. 24
Hardware Reset........................................................................... 25
Software Reset Functionality .................................................... 25
Theory of Operation ...................................................................... 26
Analog Inputs.............................................................................. 26
Analog-to-Digital Conversion.................................................. 26
Current Channel ADC............................................................... 27
di/dt Current Sensor and Digital Integrator............................... 29
Voltage Channel ADC ............................................................... 30
Changing Phase Voltage Data Path.......................................... 31
Data Sheet
Power Quality Measurements................................................... 32
Phase Compensation ................................................................. 37
Reference Circuit........................................................................ 39
Digital Signal Processor............................................................. 39
Root Mean Square Measurement............................................. 41
Active Power Calculation .......................................................... 45
Fundamental Reactive Power Calculation.............................. 51
Apparent Power Calculation..................................................... 55
Power Factor Calculation .......................................................... 58
Harmonics Calculations ............................................................ 58
Waveform Sampling Mode ....................................................... 66
Energy-to-Frequency Conversion............................................ 66
No Load Condition .................................................................... 71
Checksum Register..................................................................... 73
Interrupts..................................................................................... 74
Serial Interfaces .......................................................................... 75
ADE7880 Quick Setup As Energy Meter ................................ 82
Layout Guidelines....................................................................... 83
Crystal Circuit ............................................................................ 84
ADE7880 Evaluation Board...................................................... 84
Die Version.................................................................................. 84
Silicon Anomaly ............................................................................. 85
ADE7880 Functionality Issues ................................................. 85
Functionality Issues.................................................................... 85
Section 1. ADE7880 Functionality Issues ............................... 86
Registers List ................................................................................... 87
Outline Dimensions ..................................................................... 107
Ordering Guide ........................................................................ 107
Rev. C | Page 2 of 107
3Pages


Data Sheet
ADE7880
SPECIFICATIONS
VDD = 3.3 V ± 10%, AGND = DGND = 0 V, on-chip reference, CLKIN = 16.384 MHz, TMIN to TMAX = −40°C to +85°C, TTYP = 25°C.
Table 1.
Parameter1, 2
ACTIVE ENERGY MEASUREMENT
Active Energy Measurement Error
(per Phase)
Total Active Energy
Fundamental Active Energy
AC Power Supply Rejection
Output Frequency Variation
DC Power Supply Rejection
Output Frequency Variation
Total Active Energy Measurement
Bandwidth (−3 dB)
REACTIVE ENERGY MEASUREMENT
Reactive Energy Measurement Error
(per Phase)
Fundamental Reactive Energy
AC Power Supply Rejection
Output Frequency Variation
DC Power Supply Rejection
Output Frequency Variation
Fundamental Reactive Energy
Measurement Bandwidth (−3 dB)
Min Typ
0.1
0.2
0.1
0.2
0.1
0.2
0.1
0.2
0.01
0.01
3.3
0.1
0.2
0.1
0.2
0.01
0.01
3.3
Max Unit Test Conditions/Comments
% Over a dynamic range of 1000 to 1,
PGA = 1, 2, 4; integrator off, pf = 1, gain
compensation only
% Over a dynamic range of 5000 to 1,
PGA = 1, 2, 4; integrator off, pf = 1
% Over a dynamic range of 500 to 1,
PGA = 8, 16; integrator on, pf = 1, gain
compensation only
% Over a dynamic range of 2000 to 1,
PGA = 8, 16; integrator on, pf = 1
% Over a dynamic range of 1000 to 1,
PGA = 1, 2, 4; integrator off, pf = 1, gain
compensation only
% Over a dynamic range of 5000 to 1,
PGA = 1, 2, 4; integrator off, pf = 1
% Over a dynamic range of 500 to 1,
PGA = 8, 16; integrator on, pf = 1, gain
compensation only
% Over a dynamic range of 2000 to 1,
PGA = 8, 16; integrator on, pf = 1
VDD = 3.3 V + 120 mV rms/120 Hz,
IPx = VPx = ±100 mV rms
%
VDD = 3.3 V ± 330 mV dc
%
kHz
% Over a dynamic range of 1000 to 1,
PGA = 1, 2, 4; integrator off, pf = 0, gain
compensation only
% Over a dynamic range of 5000 to 1,
PGA = 1, 2, 4; integrator off, pf = 0
% Over a dynamic range of 500 to 1,
PGA = 8, 16; integrator on, pf = 0, gain
compensation only
% Over a dynamic range of 2000 to 1,
PGA = 8, 16; integrator on, pf = 0
VDD = 3.3 V + 120 mV rms/120 Hz,
IPx = VPx = ± 100 mV rms
%
VDD = 3.3 V ± 330 mV dc
%
kHz
Rev. C | Page 5 of 107
6 Page
合計 : 30 ページ |
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部品番号 | 部品説明 | メーカ |
ADE7880 | Polyphase Multifunction Energy Metering IC | ![]() Analog Devices |