Polyphase Multifunction Energy Metering IC with Harmonic Monitoring Data Sheet ADE7880 FEATURES GENERAL DESCRIPTION 1 Highly accurate supports IEC 62053-21, IEC 62053-22, The ADE7880 is a high accuracy, 3-phase electrical energy IEC 62053-23, EN 50470-1, EN 50470-3, ANSI C12.20, and measurement IC with serial interfaces and three flexible pulse IEEE1459 standards outputs. The ADE7880 device incorporates second-order sigma- Supports IEC 61000-4-7 Class I and Class II accuracy delta (-) analog-to-digital converters (ADCs), a digital specification integrator, reference circuitry, and all of the signal processing Compatible with 3-phase, 3-wire or 4-wire (delta or wye), required to perform the total (fundamental and harmonic) active, and other 3-phase services and apparent energy measurements, rms calculations, as well as Supplies rms, active, reactive, and apparent powers, power fundamental-only active and reactive energy measurements. In factor, THD, and harmonic distortion of all harmonics addition, the ADE7880 computes the rms of harmonics on the within 2.8 kHz pass band on all phases phase and neutral currents and on the phase voltages, together Supplies rms and harmonic distortions of all harmonics with the active, reactive and apparent powers, and the power within 2.8 kHz pass band on neutral current factor and harmonic distortion on each harmonic for all phases. Less than 1% error in harmonic current and voltage rms, Total harmonic distortion (THD) is computed for all currents harmonic active and reactive powers over a dynamic and voltages. A fixed function digital signal processor (DSP) range of 2000 to 1 at T = 25C A executes this signal processing. The DSP program is stored in Supplies total (fundamental and harmonic) active and the internal ROM memory. apparent energy and fundamental active/reactive energy The ADE7880 is suitable for measuring active, reactive, and on each phase and on the overall system apparent energy in various 3-phase configurations, such as wye Less than 0.1% error in active and fundamental reactive or delta services with, both, three and four wires. The ADE7880 energy over a dynamic range of 1000 to 1 at T = 25C A provides system calibration features for each phase, that is, rms Less than 0.2% error in active and fundamental reactive offset correction, phase calibration, and gain calibration. The energy over a dynamic range of 5000 to 1 at T = 25C A CF1, CF2, and CF3 logic outputs provide a wide choice of Less than 0.1% error in voltage and current rms over a power information: total active powers, apparent powers, or the dynamic range of 1000 to 1 at T = 25C A sum of the current rms values, and fundamental active and Battery supply input for missing neutral operation reactive powers. Wide supply voltage operation: 2.4 V to 3.7 V Reference: 1.2 V (drift 20 ppm/C typical) with external The ADE7880 contains waveform sample registers that allow overdrive capability access to all ADC outputs. The devices also incorporate power 40-lead lead frame chip scale package (LFCSP), Pb-free, pin- quality measurements, such as short duration low or high for-pin compatible with ADE7854, ADE7858, ADE7868 and voltage detections, short duration high current variations, line ADE7878 voltage period measurement, and angles between phase voltages 2 and currents. Two serial interfaces, SPI and I C, can be used to APPLICATIONS communicate with the ADE7880. A dedicated high speed Energy metering systems interface, the high speed data capture (HSDC) port, can be used 2 Power quality monitoring in conjunction with I C to provide access to the ADC outputs Solar inverters and real-time power information. The ADE7880 also has two Process monitoring interrupt request pins, IRQ0 and IRQ1, to indicate that an enabled Protective devices 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20112014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. ADE7880 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Power Quality Measurements ................................................... 32 Applications ....................................................................................... 1 Phase Compensation ................................................................. 37 General Description ......................................................................... 1 Reference Circuit ........................................................................ 39 Revision History ............................................................................... 3 Digital Signal Processor ............................................................. 39 Functional Block Diagram .............................................................. 4 Root Mean Square Measurement ............................................. 41 Specifications ..................................................................................... 5 Active Power Calculation .......................................................... 45 Timing Characteristics ................................................................ 8 Fundamental Reactive Power Calculation .............................. 51 Absolute Maximum Ratings .......................................................... 11 Apparent Power Calculation ..................................................... 55 Thermal Resistance .................................................................... 11 Power Factor Calculation .......................................................... 58 ESD Caution ................................................................................ 11 Harmonics Calculations ............................................................ 58 Pin Configuration and Function Descriptions ........................... 12 Waveform Sampling Mode ....................................................... 66 Typical Performance Characteristics ........................................... 14 Energy-to-Frequency Conversion............................................ 66 Test Circuit ...................................................................................... 19 No Load Condition .................................................................... 71 Terminology .................................................................................... 20 Checksum Register..................................................................... 73 Power Management ........................................................................ 21 Interrupts ..................................................................................... 74 PSM0Normal Power Mode (All Parts) ................................ 21 Serial Interfaces .......................................................................... 75 PSM1Reduced Power Mode.................................................. 21 ADE7880 Quick Setup As Energy Meter ................................ 82 PSM2Low Power Mode ......................................................... 21 Layout Guidelines....................................................................... 83 PSM3Sleep Mode (All Parts) ................................................ 22 Crystal Circuit ............................................................................ 84 Power-Up Procedure .................................................................. 24 ADE7880 Evaluation Board ...................................................... 84 Hardware Reset ........................................................................... 25 Die Version .................................................................................. 84 Software Reset Functionality .................................................... 25 Silicon Anomaly ............................................................................. 85 Theory of Operation ...................................................................... 26 ADE7880 Functionality Issues ................................................. 85 Analog Inputs .............................................................................. 26 Functionality Issues .................................................................... 85 Analog-to-Digital Conversion .................................................. 26 Section 1. ADE7880 Functionality Issues ............................... 86 Current Channel ADC............................................................... 27 Registers List ................................................................................... 87 di/dt Current Sensor and Digital Integrator ............................... 29 Outline Dimensions ..................................................................... 107 Voltage Channel ADC ............................................................... 30 Ordering Guide ........................................................................ 107 Changing Phase Voltage Data Path .......................................... 31 Rev. C Page 2 of 107