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ADE7753
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
Timing Characteristics..................................................................... 6
Absolute Maximum Ratings............................................................ 7
ESD Caution .................................................................................. 7
Terminology ...................................................................................... 8
Pin Configuration and Function Descriptions ............................. 9
Typical Performance Characteristics ........................................... 11
Theory of Operation ...................................................................... 16
Analog Inputs .............................................................................. 16
di/dt Current Sensor and Digital Integrator ............................... 17
Zero-Crossing Detection ........................................................... 18
Period Measurement .................................................................. 19
Power Supply Monitor ............................................................... 19
Line Voltage Sag Detection ....................................................... 19
Peak Detection ............................................................................ 20
ADE7753 Interrupts ................................................................... 21
Temperature Measurement ....................................................... 22
ADE7753 Analog-to-Digital Conversion ................................ 22
Channel 1 ADC .......................................................................... 23
Channel 2 ADC .......................................................................... 25
Phase Compensation.................................................................. 27
Active Power Calculation .......................................................... 28
Energy Calculation..................................................................... 29
Power Offset Calibration ........................................................... 31
Energy-to-Frequency Conversion............................................ 31
Line Cycle Energy Accumulation Mode ................................. 33
Positive-Only Accumulation Mode ......................................... 33
No-Load Threshold.................................................................... 33
Reactive Power Calculation ...................................................... 33
Sign of Reactive Power Calculation ......................................... 35
Apparent Power Calculation ..................................................... 35
Apparent Energy Calculation ................................................... 36
Line Apparent Energy Accumulation ...................................... 37
Energies Scaling .......................................................................... 38
Calibrating an Energy Meter Based on the ADE7753 ........... 38
CLKIN Frequency ...................................................................... 48
Suspending ADE7753 Functionality ....................................... 48
Checksum Register..................................................................... 48
ADE7753 Serial Interface .......................................................... 49
ADE7753 Registers ......................................................................... 52
ADE7753 Register Descriptions ................................................... 55
Communications Register ......................................................... 55
Mode Register (0x09)................................................................. 55
Interrupt Status Register (0x0B), Reset Interrupt Status
Register (0x0C), Interrupt Enable Register (0x0A) .............. 57
CH1OS Register (0x0D) ............................................................ 58
Outline Dimensions ....................................................................... 59
Ordering Guide .......................................................................... 59
Rev. C | Page 2 of 60
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