ADE9078 datasheet(3/108 Pages) AD

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ADE9078

Data Sheet

Rev. 0 | Page 2 of 107

TABLE OF CONTENTS

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

Applications....................................................................................... 1

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

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

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

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

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

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

Thermal Resistance ...................................................................... 9

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

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

Typical Performance Characteristics ........................................... 12

Total Energy Linearity over Supply and Temperature........... 12

Fundamental Energy Linearity with Fifth Harmonic over

Supply and Temperature............................................................ 13

Total Energy Error over Frequency.......................................... 14

RMS Linearity over Temperature and RMS Error over

Frequency .................................................................................... 15

Energy Linearity Repeatability ................................................. 16

Total Energy and RMS Linearity with Integrator On............ 17

Total Energy Error over Frequency with Integrator On ....... 18

Test Circuit ...................................................................................... 19

Terminology .................................................................................... 20

Theory Of Operation ..................................................................... 22

ADC ............................................................................................. 22

Crystal Oscillator/External Clock ............................................ 24

Power Management.................................................................... 25

Measurements (Normal Mode) ................................................ 27

Measurements (PSM1) .............................................................. 45

Measurements (PSM2) .............................................................. 54

Key Features .................................................................................... 55

Flexible Waveform Buffer with Resampling ........................... 55

Multipoint Phase/Gain Calibration ......................................... 55

RMS of Sum of Instantaneous Currents Measurement......... 55

Tamper Modes ............................................................................ 55

Power Factor................................................................................ 55

Zero-Crossing Timeout Detection........................................... 55

Line Period Measurement ......................................................... 55

Angle Measurement ................................................................... 55

Phase Sequence Error Detection.............................................. 55

Quick Start....................................................................................... 56

Applications Information .............................................................. 57

Non-Blondel Compliant Meters............................................... 58

Applying the ADE9078 to a 4-Wire Wye Service ...................... 58

Applying the ADE9078 to a 3-Wire Delta Service................. 59

Applying the ADE9078 to a Non-Blondel Compliant, 4-Wire

Wye Service ................................................................................. 60

Applying the ADE9078 to a Non-Blondel Compliant, 4-Wire

Delta Service ............................................................................... 60

Service Type Summary .............................................................. 60

Accessing On-Chip Data ............................................................... 62

SPI Protocol Overview .............................................................. 62

SPI Write...................................................................................... 63

SPI Read....................................................................................... 63

SPI Burst Read ............................................................................ 63

SPI Protocol CRC ....................................................................... 64

Additional Communication Verification Registers ............... 64

CRC of Configuration Registers............................................... 65

Configuration Lock.................................................................... 65

Waveform Buffer ............................................................................ 66

Fixed Data Rate Waveforms...................................................... 67

Fixed Data Rate Waveforms Filling and Trigger-Based Modes.. 68

Resampled Waveforms .............................................................. 70

Configuring the Waveform Buffer........................................... 70

Burst Read Waveform Buffer Samples from SPI.................... 71

Interrupts/Events............................................................................ 74

Interrupts (IRQ0 and IRQ1)..................................................... 74

EVENT ........................................................................................ 74

Status Bits in Additional Registers ........................................... 74

Troubleshooting.............................................................................. 75

SPI Does Not Work .................................................................... 75

PSM2_CFG Register Value Is Not Retained When Going

from PSM2 or PSM3 to PSM0.................................................. 75

Outline Dimensions ..................................................................... 107

Ordering Guide ........................................................................ 107

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