ADE7854AACPZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'ADE7854AACPZ' PDF : 96 Pages View PDF
ADE7854A/ADE7858A/ADE7868A/ADE7878A
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Functional Block Diagrams............................................................. 3
Specifications..................................................................................... 7
Timing Characteristics .............................................................. 10
Absolute Maximum Ratings.......................................................... 13
Thermal Resistance .................................................................... 13
ESD Caution................................................................................ 13
Pin Configuration and Function Descriptions........................... 14
Typical Performance Characteristics ........................................... 16
Test Circuit ...................................................................................... 19
Terminology .................................................................................... 20
Power Management........................................................................ 21
PSM0 Normal Power Mode (All Devices) .............................. 21
PSM1 Reduced Power Mode (ADE7868A and ADE7878A
Only) ............................................................................................ 21
PSM2 Low Power Mode (ADE7868A and ADE7878A Only)
....................................................................................................... 21
PSM3 Sleep Mode (All Devices)............................................... 23
Power-Up Procedure.................................................................. 25
Hardware Reset........................................................................... 25
Software Reset............................................................................. 26
Theory of Operation ...................................................................... 27
Analog Inputs.............................................................................. 27
Analog-to-Digital Conversion.................................................. 27
Current Channel ADC............................................................... 28
di/dt Current Sensor and Digital Integrator ............................... 30
Voltage Channel ADC ............................................................... 31
Changing the Phase Voltage Datapath .................................... 32
Power Quality Measurements................................................... 32
Phase Compensation.................................................................. 40
Reference Circuit ........................................................................ 41
Digital Signal Processor............................................................. 42
Root Mean Square Measurement............................................. 43
Active Power Calculation .......................................................... 47
Reactive Power Calculation—ADE7858A, ADE7868A,
ADE7878A Only......................................................................... 53
Apparent Power Calculation..................................................... 57
Waveform Sampling Mode ....................................................... 60
Energy to Frequency Conversion............................................. 60
No Load Condition .................................................................... 64
Checksum Register..................................................................... 65
Interrupts..................................................................................... 66
Applications Information .............................................................. 68
Quick Setup of Devices as Energy Meters .............................. 68
Crystal Circuit ............................................................................ 68
Layout Guidelines....................................................................... 69
ADE7878A Evaluation Board................................................... 69
Die Version.................................................................................. 69
Silicon Anomaly ............................................................................. 70
ADE7854A/ADE7858A/ADE7868A/ADE7878A
Functionality Issues.................................................................... 70
Functionality Issues.................................................................... 70
Serial Interfaces............................................................................... 71
Serial Interface Selection ........................................................... 71
Communication Verification.................................................... 71
I2C-Compatible Interface .......................................................... 71
SPI-Compatible Interface.......................................................... 73
HSDC Interface .......................................................................... 75
Register List ..................................................................................... 77
Outline Dimensions ....................................................................... 95
Ordering Guide .......................................................................... 95
REVISION HISTORY
5/2016—Rev. B to Rev. C
Changes to ADE7854A/ADE7858A/ADE7868A/ADE7878A
Functionality Issues Section, Chip Marking Column ............... 70
10/2014—Rev. A to Rev. B
Changes to Figure 23...................................................................... 19
Changes to Figure 27...................................................................... 25
Changes to Silicon Anomaly Section........................................... 70
7/2014—Revision A: Initial Version
Rev. C | Page 2 of 96
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