Datasheet

ADE7953 Data Sheet
Rev. B | Page 2 of 72
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 Circ uit ...................................................................................... 16
Terminology .................................................................................... 17
ADE7953 Power-Up Procedure .................................................... 18
Required Register Setting .......................................................... 18
Theory of Operation ...................................................................... 19
Analog Inputs .............................................................................. 19
Analog-to-Digital Conversion .................................................. 19
Current 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 ............................................. 25
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
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C Interface ................................................................................ 53
UART Interface ........................................................................... 55
Communication Verification and Security ................................. 57