ADE7758 datasheet(2/68 Pages) AD

Il numero della parte	ADE7758

Spiegazioni elettronici	Poly Phase Multifunction Energy Metering IC with Per Phase Information

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Produttore elettronici	AD [Analog Devices]

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ADE7758

Rev. A | Page 2 of 68

TABLE OF CONTENTS

Specifications..................................................................................... 5

Timing Characteristics..................................................................... 7

Absolute Maximum Ratings............................................................ 9

ESD Caution.................................................................................. 9

Pin Configuration and Function Descriptions........................... 10

Terminology .................................................................................... 12

Typical Performance Characteristics ........................................... 13

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

Antialiasing Filter ....................................................................... 19

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

Current Channel ADC............................................................... 20

di/dt Current Sensor and Digital Integrator ........................... 21

Peak Current Detection ............................................................. 22

Overcurrent Detection Interrupt ............................................. 22

Voltage Channel ADC ............................................................... 22

Zero-Crossing Detection........................................................... 24

Phase Compensation.................................................................. 24

Period Measurement .................................................................. 26

Line Voltage SAG Detection ..................................................... 26

SAG Level Set.............................................................................. 26

Peak Voltage Detection.............................................................. 26

Phase Sequence Detection......................................................... 27

Power-Supply Monitor............................................................... 27

Reference Circuit ........................................................................ 28

Temperature Measurement ....................................................... 28

Root Mean Square Measurement ............................................. 28

Active Power Calculation .......................................................... 30

Reactive Power Calculation ...................................................... 35

Apparent Power Calculation..................................................... 38

Energy Registers Scaling ........................................................... 41

Waveform Sampling Mode ....................................................... 41

Calibration................................................................................... 41

Checksum Register..................................................................... 54

ADE7758 Interrupts................................................................... 54

Using the ADE7758 Interrupts with an MCU........................ 54

Interrupt Timing ........................................................................ 55

ADE7758 Serial Interface.......................................................... 55

ADE7758 Serial Write Operation ............................................ 56

ADE7758 Serial Read Operation ............................................. 57

Accessing the ADE7758 On-Chip Registers........................... 58

Communications Register......................................................... 58

Operational Mode Register (0x13) .......................................... 61

Measurement Mode Register (0x14) ....................................... 62

Waveform Mode Register (0x15) ............................................. 62

Computational Mode Register (0x16)..................................... 63

Line Cycle Accumulation Mode Register (0x17) ................... 64

Interrupt Mask Register (0x18) ................................................ 65

Interrupt Status Register (0x19)/Reset Interrupt Status

Register (0x1A)........................................................................... 66

Outline Dimensions ....................................................................... 67

Ordering Guide .......................................................................... 67

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