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ADE7878:  Polyphase Multifunction Energy Metering IC with per Phase Active and Reactive Powers

Product Details

Product Status:Recommended for New Designs

The ADE7878 is a high accuracy, 3-phase electrical energy measurement IC with serial interfaces and three flexible pulse outputs. The ADE7878 incorporates second-order sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), a digital integrator, reference circuitry, and all the signal processing required to perform total (fundamental and harmonic) active, reactive, and apparent energy measurement and rms calculations, as well as fundamental only active and reactive energy measurement and rms calculations. A fixed function digital signal processor (DSP) executes this signal processing. The DSP program is stored into internal ROM memory.

The ADE7878 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 ADE7878 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, reactive, and apparent powers, or the sum of the current rms values, and fundamental active and reactive powers.

The ADE7878 contains waveform sample registers that allow access to all ADC outputs. The device also incorporates 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 ADE7878. 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 ADE7878 also has two interrupt request pins, IRQ0 and IRQ1, to indicate that an enabled interrupt event has occurred. For the ADE7878, three specially designed low power modes ensure the continuity of energy accumulation when the ADE7878 is in a tampering situation.

The ADE7878 is available in a 40-lead LFCSP, Pb-free package.

Applications

  • Energy metering systems

FEATURES and BENEFITS

  • 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/ apparent energy and fundamental active/reactive energy 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
  • See data sheet for additional features

Functional Block Diagram for ADE7878

Additional Information

The ADE7878 family of parts consist of the ADE7878, ADE7868, ADE7858 and ADE7854.
The EVAL-ADE7878EBZ can be used to evaluate all 4 parts without the need of changing parts on the board

Documentation

Title Content Type File Type
ADE7854/ADE7858/ADE7868/ADE7878: Polyphase Multifunction Energy Metering IC with Harmonic and Fundamental Information Data Sheet (Rev H, 04/2014) (pdf, 1046 kB)
  • ADE7854/ADE7858/ADE7868/ADE7878: Silicon Anomaly  (pdf, 65 kB)
    This anomaly list describes the known issues with the ADE7854, ADE7858, ADE7868, and ADE7878 silicon identified by the version register (Address 0xE707) being equal to 2, 4 and 5.
Data Sheets PDF
AN-1334: Impact of Adding a Neutral Attenuation Network in a 3P4W Wye System  (pdf, 316 kB) Application Notes PDF
AN-1272: Differences Between the ADE7854A/ADE7858A/ADE7868A/ADE7878A and ADE7854/ADE7858/ADE7868/ADE7878 Products  (pdf, 230 kB) Application Notes PDF
AN-1127: Differences Between the ADE7880 and the ADE7878  (pdf, 103 kB) Application Notes PDF
AN-1076: Calibrating an ADE7878-Based, 3-Phase Energy Meter  (pdf, 221 kB) Application Notes PDF
AN-639: Frequently Asked Questions (FAQs) Analog Devices Energy (ADE) Products  (pdf, 165 kB) Application Notes PDF
UG-146: Evaluating the ADE7878 Energy Metering IC  (pdf, 1915 kB) User Guides PDF
All-Electronic Power and Energy Meters
(Analog Dialogue, Vol. 33, No. 2, February, 1999)
Analog Dialogue HTML
Smart Metering Technology Promotes Energy Efficiency for a Greener World
Analog Dialogue, Volume 43 – January 2009
Analog Dialogue HTML
Measuring Harmonic Energy with a Solid State Energy Meter  (pdf, 46 kB)
(Reprinted with permission from Metering International where it was first printed in Issue 3, 2003)
Technical Articles PDF
IC Technology and Failure Mechanisms - Understanding Reliability Standards Can Raise Quality of Meters  (pdf, 903 kB)
by Etienne Moulin, Analog Devices, Inc. (Reprinted with permission of India's Power Magazine, PowerLine, where it first appeared in the June 2004 issue)
Technical Articles PDF
RF Meets Power Lines: Designing Intelligent Smart Grid Systems that Promote Energy Efficiency
RF DesignLine, March 2010
Technical Articles HTML
Smart Metering Technology Promotes Energy Efficiency for a Greener World
Analog Dialogue, Volume 43 – January 2009
Technical Articles HTML
Key Features of ADE7878 Polyphase Energy Metering IC  (pdf)
Metering International, 2009 - pdf
Technical Articles PDF
Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4  (pdf, 1496 kB) Solutions Bulletins PDF
Energy Measurement Solutions  (pdf, 2002 kB) Overview PDF
ADE Product Family Overview  (pdf, 1390 kB)
The portfolio includes single-phase products and polyphase products for stepper motor and LCD display meter designs, with five critical measurements available: watt, V rms, I rms, VA, and VAR.
Overview PDF
ADE78xx Polyphase Multifunction Energy Metering ICs  (pdf, 1847 kB) Overview PDF
What are the benefits of the ADE energy metering devices? FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products


Recommended External References for the ADE7878

  • For low drift, low noise, low power, low cost, we recommend the ADR280.
  • For high precision, low dropout, 10mA output, we recommend the ADR3412.
Recommended RS-485/RS-422 Data Transceivers for the ADE7878
  • For low power, half duplex transceiver in 8-lead SOIC package, we recommend the ADM487E.
  • For isolated full/half duplex transceiver with integrated transformer driver, we recommend the ADM2487E.
Recommended Digital Isolators for the ADE7878
  • For a dual, bi-directional, 2.5kV, hot swap isolator, we recommend the ADuM1250.
  • For a dual, bi-directional, 5kV, hot swap isolator, we recommend the ADuM2250.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

ADE7878 Model Options
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADE7878 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADE7878EBZ Status: Production Evaluation Board $390.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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