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기능 Polyphase Multifunction Energy Metering IC
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ADE7854 데이터시트, 핀배열, 회로
Data Sheet
Polyphase Multifunction Energy Metering IC
with Harmonic and Fundamental Information
ADE7854/ADE7858/ADE7868/ADE7878
FEATURES
Highly accurate; supports EN 50470-1, EN 50470-3,
IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards
Compatible with 3-phase, 3- or 4-wire (delta or wye), and
other 3-phase services
Supplies total (fundamental and harmonic) active, reactive
(ADE7878, ADE7868, and ADE7858 only), and apparent
energy, and fundamental active/reactive energy (ADE7878
only) on each phase and on the overall system
Less than 0.1% error in active and reactive energy over a
dynamic range of 1000 to 1 at TA = 25°C
Less than 0.2% error in active and reactive energy over a
dynamic range of 3000 to 1 at TA = 25°C
Supports current transformer and di/dt current sensors
Dedicated ADC channel for neutral current input (ADE7868 and
ADE7878 only)
Less than 0.1% error in voltage and current rms over a
dynamic range of 1000 to 1 at TA = 25°C
Supplies sampled waveform data on all three phases and on
neutral current
Selectable no load threshold levels for total and
fundamental active and reactive powers, as well as for
apparent powers
Low power battery mode monitors phase currents for
antitampering detection (ADE7868 and ADE7878 only)
Battery supply input for missing neutral operation
Phase angle measurements in both current and voltage
channels with a typical 0.3° error
Wide-supply voltage operation: 2.4 V to 3.7 V
Reference: 1.2 V (drift +5 ppm/°C typical) with external
overdrive capability
Single 3.3 V supply
40-lead lead frame chip scale package (LFCSP), Pb-free
Operating temperature: −40°C to +85°C
Flexible I2C, SPI, and HSDC serial interfaces
APPLICATIONS
Energy metering systems
GENERAL DESCRIPTION
The ADE7854/ADE7858/ADE7868/ADE7878 are high accuracy,
3-phase electrical energy measurement ICs with serial interfaces
and three flexible pulse outputs. The ADE78xx devices incorporate
second-order sigma-delta (Σ-∆) analog-to-digital converters
(ADCs), a digital integrator, reference circuitry, and all of the
signal processing required to perform total (fundamental and
harmonic) active, reactive (ADE7878, ADE7868, and
ADE7858), and apparent energy measurement and rms calcu-
lations, as well as fundamental-only active and reactive energy
measurement (ADE7878) and rms calculations. A fixed function
digital signal processor (DSP) executes this signal processing.
The DSP program is stored in the internal ROM memory.
The ADE7854/ADE7858/ADE7868/ADE7878 are 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 ADE78xx devices provide 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,
reactive, and apparent powers, or the sum of the current rms
values, and fundamental active and reactive powers.
The ADE7854/ADE7858/ADE7868/ADE7878 contain wave-
form 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 ADE78xx. 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 ADE7854/ADE7858/ADE7868/ADE7878 also have two
interrupt request pins, IRQ0 and IRQ1, to indicate that an enabled
interrupt event has occurred. For the ADE7868/ADE7878, three
specially designed low power modes ensure the continuity of
energy accumulation when the ADE7868/ADE7878 is in a tam-
pering situation. See Table 1 for a quick reference chart listing
each part and its functions. The ADE78xx are available in the
40-lead LFCSP, Pb-free package.
Table 1. Part Comparison
Part No.
IRMS,
VRMS,
and
WATT VAR VA
ADE7878 Yes
Yes Yes
ADE7868 Yes
Yes Yes
ADE7858 Yes
Yes Yes
ADE7854 Yes
No Yes
di/dt
Yes
Yes
Yes
Yes
Fundamental
WATT and
VAR
Yes
No
No
No
Tamper
Detect and
Low Power
Modes
Yes
Yes
No
No
Rev. H
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 ©2010–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com




ADE7854 pdf, 반도체, 판매, 대치품
ADE7854/ADE7858/ADE7868/ADE7878
Changes to Line Cycle Reactive Energy Accumulation Mode
Section and to Figure 67 ................................................................ 53
No Load Detection Based On Total Active, Reactive Powers
Section.............................................................................................. 61
Change to Equation 50................................................................... 63
Changes to the HSDC Interface Section ..................................... 70
Changes to Figure 87 and Figure 88............................................. 71
Changes to Figure 89...................................................................... 72
Changes to Table 30........................................................................ 77
Changes to Table 46........................................................................ 88
11/10—Rev. B to Rev. C
Change to Signal-to-Noise-and-Distortion Ratio, SINAD
Parameter, Table 1............................................................................. 9
Changes to Figure 18...................................................................... 18
Changes to Figure 22...................................................................... 19
Changes to Silicon Anomaly Section........................................... 72
Added Table 28 to Silicon Anomaly Section............................... 73
8/10—Rev. A to Rev. B
Changes to Figure 1.......................................................................... 4
Changes to Figure 2.......................................................................... 5
Changes to Figure 3.......................................................................... 6
Changes to Figure 4.......................................................................... 7
Change to Table 8 ........................................................................... 16
Changes to Power-Up Procedure Section ................................... 23
Changes to Equation 6 and Equation 7 ....................................... 33
Changes to Equation 17 ................................................................. 43
Changes to Active Power Offset Calibration Section ................ 45
Changes to Figure 63...................................................................... 46
Changes to Reactive Power Offset Calibration Section............. 49
Changes to Figure 82...................................................................... 65
Added Silicon Anomaly Section, Renumbered Tables
Sequentially ..................................................................................... 71
Data Sheet
3/10—Rev. 0 to Rev. A
Added ADE7854, ADE7858, and ADE7878...................Universal
Reorganized Layout............................................................Universal
Added Table 1, Renumbered Sequentially .....................................1
Added Figure 1, Renumbered Sequentially ...................................3
Added Figure 2...................................................................................4
Added Figure 3...................................................................................5
Changes to Specifications Section...................................................7
Changes to Figure 9 and changes to Table 8 .............................. 14
Changes to Typical Performance Characteristics Section ........ 16
Changes to Figure 22...................................................................... 18
Changes to the Power Management Section .............................. 20
Changes to the Theory of Operation Section ............................. 25
Changes to Figure 31 and Figure 32............................................. 27
Change to Equation 28 .................................................................. 47
Changes to Figure 83...................................................................... 66
Changes to Figure 86...................................................................... 68
Changes to the Registers List Section .......................................... 72
Changes to Ordering Guide .......................................................... 91
2/10—Revision 0: Initial Version
Rev. H | Page 4 of 100

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ADE7854 전자부품, 판매, 대치품
Data Sheet
ADE7854/ADE7858/ADE7868/ADE7878
Figure 3. ADE7868 Functional Block Diagram
Rev. H | Page 7 of 100

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