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ADE7880

Polyphase Multifunction Energy Metering IC with Harmonic Monitoring

Analog Devices 

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

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