ADE7953 datasheet(2/68 Pages) AD

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ADE7953

Data Sheet

Rev. A | Page 2 of 68

TABLE OF CONTENTS

Features .............................................................................................. 1

General Description ......................................................................... 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 3

Specifications..................................................................................... 4

Timing Characteristics ................................................................ 6

Absolute Maximum Ratings............................................................ 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 11

Test Circuit ...................................................................................... 16

Terminology .................................................................................... 17

ADE7953 Power-Up Procedure.................................................... 18

Required Register setting .......................................................... 18

Theory of Operation ...................................................................... 19

Analog Inputs.............................................................................. 19

Analog-to-Digital Conversion.................................................. 19

urrent Channel ADCs ............................................................ 21

Voltage Channel ADC ............................................................... 21

Reference Circuit ........................................................................ 22

Root Mean Square Measurement ................................................. 23

Current Channel RMS Calculation.......................................... 23

Voltage Channel RMS Calculation........................................... 23

Active Power Calculation .............................................................. 24

Sign of Active Power Calculation............................................. 24

Active Energy Calculation......................................................... 25

Active Energy Accumulation Modes ....................................... 27

Reactive Power Calculation........................................................... 28

Sign of Reactive Power Calculation ......................................... 28

Reactive Energy Calculation ..................................................... 29

Reactive Energy Accumulation Modes ................................... 30

Apparent Power Calculation ......................................................... 31

Apparent Energy Calculation ................................................... 31

Ampere-Hour Accumulation.................................................... 32

Energy-to-Frequency Conversion................................................ 33

Pulse Output Characteristics .................................................... 33

Energy Calibration ......................................................................... 34

Gain Calibration ......................................................................... 34

Phase Calibration ....................................................................... 34

Offset Calibration....................................................................... 35

Period Measurement ...................................................................... 36

Instantaneous Powers and Waveform Sampling ........................ 37

Power Factor.................................................................................... 38

Using the Line Cycle Accumulation Mode to Determine the

Power Factor ............................................................................... 38

Power Factor with No-Load Detection ................................... 38

Angle Measurement ................................................................... 39

No-Load Detection ........................................................................ 40

Setting the No-Load Thresholds .............................................. 40

Active Energy No-Load Detection........................................... 40

Reactive Energy No-Load Detection....................................... 41

Apparent Energy No-Load Detection ..................................... 41

Zero-Crossing Detection............................................................... 43

Zero-Crossing Output Pins....................................................... 43

Zero-Crossing Interrupts .......................................................... 43

Zero-Crossing Timeout............................................................. 44

Zero-Crossing Threshold .......................................................... 44

Voltage Sag Detection .................................................................... 45

Setting the SAGCYC Register................................................... 45

Setting the SAGLVL Register.................................................... 45

Voltage Sag Interrupt ................................................................. 45

Peak Detection ................................................................................ 46

Indication of Power Direction ...................................................... 47

Reverse Power ............................................................................. 47

Sign Indication............................................................................ 47

Overcurrent and Overvoltage Detection..................................... 48

Setting the OVLVL and OILVL Registers ............................... 48

Overvoltage and Overcurrent Interrupts ................................ 48

Alternative Output Functions....................................................... 49

ADE7953 Interrupts....................................................................... 50

Primary Interrupts (Voltage Channel and Current Channel

A) .................................................................................................. 50

Current Channel B Interrupts .................................................. 50

Communicating with the ADE7953 ............................................ 51

Communication Autodetection ............................................... 51

Locking the Communication Interface ................................... 51

SPI Interface ................................................................................ 52

I2C Interface ................................................................................ 53

UART Interface........................................................................... 55

Communication Verification and Security................................. 57

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