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ADE9078 の電気的特性と機能
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ADE9078のメーカーはAnalog Devicesです、この部品の機能は「Polyphase Energy Metering AFE」です。 |
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製品の詳細 ( Datasheet PDF )
| 部品番号 ADE9078 |
| 部品説明 Polyphase Energy Metering AFE |
| メーカ Analog Devices |
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Data Sheet
High Performance, Polyphase
Energy Metering AFE
ADE9078
FEATURES
FUNCTIONAL BLOCK DIAGRAM
7 high performance analog-to-digital converters (ADCs)
101 dB signal-to-noise ratio (SNR)
10,000:1 dynamic range
Wide input range: ±1 V, 0.707 V rms full scale
Differential inputs
±25 ppm/°C maximum channel temperature drift (including
ADC, internal VREF, and PGA drift) enabling Class 0.2
meters with standard external components
Power quality measurements
Line frequency: 1 measurement per phase
Zero crossing detection, zero-crossing timeout
Phase angle measurements
Supports current transformers (CTs) and Rogowski coil
(di/dt) sensors
Multiple range phase/gain compensation for CTs
Digital integrator for Rogowski coils
Flexible waveform buffer
Able to resample waveform to ensure 64 points per line
cycle for ease of external harmonic analysis
Events can trigger waveform storage
Simplifies data collection for IEC 61000-4-7 harmonic analysis
Advanced metrology feature set
Total active power, volt-amperes reactive (VAR), volt-
amperes (VA), watthour, VAR-hour, and VA-hour
Fundamental VAR and VAR-hour
Current and voltage rms per phase (xIRMS, xVRMS)
Supports active energy standards: IEC 62053-21,
IEC 62053-22; EN50470-3; OIML R46, ANSI C12.20
Supports reactive energy standards: IEC 62053-23,
IEC 62053-4
High speed communication port
10 MHz serial peripheral interface (SPI)
APPLICATIONS
Polyphase meters
Power quality monitoring
Protective device
GENERAL DESCRIPTION
The ADE90781 is a highly accurate, fully integrated energy
metering device. Interfacing with both current transformer
(CT) and Rogowski coil sensors, the ADE9078 enables users to
develop a 3-phase metrology platform, which achieves high
performance for Class 1 up to Class 0.2 meters.
LDO ADE9078
PGA
ADC
METROLOGY FEATURES
PGA
ADC
PGA
ADC
SINC4
AND
PGA
ADC
DECIMATION
PGA
ADC
(PER PHASE)
IRMS, VRMS
ACTIVE POWER, VA
WATTHOUR, VA-Hr
WAVEFORM BUFFER
LINE FREQUENCY
ETC.
PGA
ADC
PGA
ADC
1.25V
REFERENCE
Figure 1.
CF1
TO CF4
IRQ0
IRQ1
SPI
The ADE9078 integrates seven high performances ADCs and a
flexible DSP core. An integrated high end reference ensures low
drift over temperature with a combined drift of less than
±25 ppm/°C maximum per channel, each of which includes a
programmable gain amplifier (PGA) and ADC.
The ADE9078 offers an integrated flexible waveform buffer that
stores samples at a fixed data rate or a sampling rate that varies
based on line frequency to ensure 64 points per line cycle. These
two options make it easy to implement harmonic analysis in an
external processor according to IEC 61000-4-7.
Two power modes are provided to enable detection of meter
tampering: PSM2 uses a low power comparator to compare
current channels to a threshold and indicates whether it is
exceeded on the IRQ0 and IRQ1 outputs; PSM1 enables fast
measurement of current and voltage rms (xVRMS and xIRMS),
active power, and VAR during a tamper.
The ADE9078 allows advanced and highly accurate energy
measurements, enabling one platform to cover a wide range of
meters, through a combination of various high end metrology
features and superior analog performance.
1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329; 6,262,600; 7,489,526; 7,558,080. Other patents are pending.
Rev. 0
Document Feedback
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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
©2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 Page
ADE9078
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
Timing Characteristics ................................................................ 7
Absolute Maximum Ratings............................................................ 9
Thermal Resistance ...................................................................... 9
ESD Caution.................................................................................. 9
Pin Configuration and Function Descriptions........................... 10
Typical Performance Characteristics ........................................... 12
Total Energy Linearity over Supply and Temperature........... 12
Fundamental Energy Linearity with Fifth Harmonic over
Supply and Temperature............................................................ 13
Total Energy Error over Frequency.......................................... 14
RMS Linearity over Temperature and RMS Error over
Frequency .................................................................................... 15
Energy Linearity Repeatability ................................................. 16
Total Energy and RMS Linearity with Integrator On............ 17
Total Energy Error over Frequency with Integrator On ....... 18
Test Circuit ...................................................................................... 19
Terminology .................................................................................... 20
Theory Of Operation ..................................................................... 22
ADC ............................................................................................. 22
Crystal Oscillator/External Clock ............................................ 24
Power Management.................................................................... 25
Measurements (Normal Mode) ................................................ 27
Measurements (PSM1) .............................................................. 45
Measurements (PSM2) .............................................................. 54
Key Features .................................................................................... 55
Flexible Waveform Buffer with Resampling ........................... 55
Multipoint Phase/Gain Calibration ......................................... 55
RMS of Sum of Instantaneous Currents Measurement......... 55
Tamper Modes ............................................................................ 55
Power Factor................................................................................ 55
Zero-Crossing Timeout Detection........................................... 55
Line Period Measurement ......................................................... 55
Angle Measurement ................................................................... 55
Data Sheet
Phase Sequence Error Detection.............................................. 55
Quick Start....................................................................................... 56
Applications Information .............................................................. 57
Non-Blondel Compliant Meters............................................... 58
Applying the ADE9078 to a 4-Wire Wye Service ...................... 58
Applying the ADE9078 to a 3-Wire Delta Service................. 59
Applying the ADE9078 to a Non-Blondel Compliant, 4-Wire
Wye Service ................................................................................. 60
Applying the ADE9078 to a Non-Blondel Compliant, 4-Wire
Delta Service ............................................................................... 60
Service Type Summary .............................................................. 60
Accessing On-Chip Data ............................................................... 62
SPI Protocol Overview .............................................................. 62
SPI Write...................................................................................... 63
SPI Read....................................................................................... 63
SPI Burst Read ............................................................................ 63
SPI Protocol CRC ....................................................................... 64
Additional Communication Verification Registers ............... 64
CRC of Configuration Registers............................................... 65
Configuration Lock.................................................................... 65
Waveform Buffer ............................................................................ 66
Fixed Data Rate Waveforms...................................................... 67
Fixed Data Rate Waveforms Filling and Trigger-Based Modes.. 68
Resampled Waveforms .............................................................. 70
Configuring the Waveform Buffer........................................... 70
Burst Read Waveform Buffer Samples from SPI.................... 71
Interrupts/Events............................................................................ 74
Interrupts (IRQ0 and IRQ1)..................................................... 74
EVENT ........................................................................................ 74
Status Bits in Additional Registers ........................................... 74
Troubleshooting.............................................................................. 75
SPI Does Not Work .................................................................... 75
PSM2_CFG Register Value Is Not Retained When Going
from PSM2 or PSM3 to PSM0.................................................. 75
Register Information...................................................................... 76
Register Details ........................................................................... 88
Outline Dimensions ..................................................................... 107
Ordering Guide ........................................................................ 107
Rev. 0 | Page 2 of 107
3Pages
Data Sheet
Parameter
PSM1 Active Power
PSM2 Peak Current Detection
Min
Typ Max
0.2
5
ADC
PGA Gain Settings (GAIN)
Differential Input Voltage Range
(VxP − VxN, IxP − IxN)
Maximum Operating Voltage on
Analog Input Pins (VxP, VxN,
IxP, and IxN)
Signal-to-Noise Ratio (SNR)2
−1/GAIN
−0.6
PGA = 1
PGA = 4
Total Harmonic Distortion (THD)2
PGA = 1
PGA = 4
Signal-to-Noise and Distortion
Ratio (SINAD)2
PGA = 1
PGA = 4
Spurious-Free Dynamic Range
(SFDR)2
PGA = 1
Output Pass Band (−0.1 dB)
Sinc4 Outputs
Sinc4 + IIR LPF Outputs
Output Bandwidth (−3 dB)2
Sinc4 Outputs
Sinc4 + IIR LPF Outputs
Crosstalk2
AC Power Supply Rejection
Ratio (AC PSRR)2
AC Common-Mode Rejection
Ratio (AC CMRR)2
Gain Error
Gain Drift2
Offset
Offset Drift2
1, 2, or 4
+1/GAIN
0.6
101
97
97
94
−106
−106
−115
−112
100
96
96
93
110
0.672
0.672
3.6325
1.6
−120
−120
−115
±0.3
±3
±0.36
0
±1
±3.8
±6
ADE9078
Unit Test Conditions/Comments
% Accuracy achieved 40 ms after entering
PSM1 mode at 600:1
% Accuracy of current detection threshold,
achieved 120 ms after entering PSM2 mode
at 660:1
See the ADC section
V/V PGA gain setting is referred to as GAIN
V 0.707 V rms; when VREF = 1.25 V, this
voltage corresponds to 53 million codes
V Voltage on the pin with respect to
ground (GND = AGND = DGND =
REFGND), VREF = 1.25 V
VIN = full scale/gain; see the Terminology
section
dB 4 kSPS sinc4 + infinite impulse response
(IIR) low-pass filter (LPF) output
dB 16 kSPS sinc4 output
dB 4 kSPS sinc4 + IIR LPF output
dB 16 kSPS sinc4 output
See the Terminology section
dB 4 kSPS sinc4 + IIR LPF output
dB 16 kSPS sinc4 output
dB 4 kSPS sinc4 + IIR LPF output
dB 16 kSPS sinc4 output
See the Terminology section
dB 4 kSPS sinc4 + IIR LPF output
dB 16 kSPS sinc4 output
dB 4 kSPS sinc4 + IIR LPF output
dB 16 kSPS sinc4 output
See the Terminology section
dB 4 kSPS sinc4 + IIR LPF output
See the Terminology section
kHz 16 kSPS sinc4 output
kHz 4 kSPS output
See the Terminology section
kHz 16 kSPS sinc4 output
kHz 4 kSPS output
dB See the Terminology section, at 50 Hz
and 60 Hz
dB See the Terminology section, at 50 Hz
and 60 Hz
dB At 100 Hz and 120 Hz
%
ppm/°C
mV
μV/°C
See the Terminology section
See the Terminology section
See the Terminology section
See the Terminology section
Rev. 0 | 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 |
| ADE9078 | Polyphase Energy Metering AFE | Analog Devices |