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ADE7758
TABLE OF CONTENTS
Features .............................................................................................. 1 ?
General Description ......................................................................... 1 ?
Functional Block Diagram .............................................................. 1 ?
General Description ......................................................................... 4 ?
Specifications..................................................................................... 5 ?
Timing Characteristics ................................................................ 6 ?
Timing Diagrams.............................................................................. 7 ?
Absolute Maximum Ratings............................................................ 8 ?
ESD Caution.................................................................................. 8 ?
Pin Configuration and Function Descriptions............................. 9 ?
Terminology .................................................................................... 11 ?
Typical Performance Characteristics ........................................... 12 ?
Test Circuits..................................................................................... 17 ?
Theory of Operation ...................................................................... 18 ?
Antialiasing Filter ....................................................................... 18 ?
Analog Inputs.............................................................................. 18 ?
Current Channel ADC............................................................... 19 ?
di/dt Current Sensor and Digital Integrator............................... 20 ?
Peak Current Detection ............................................................. 21 ?
Overcurrent Detection Interrupt ............................................. 21 ?
Voltage Channel ADC ............................................................... 22 ?
Zero-Crossing Detection........................................................... 23 ?
Phase Compensation.................................................................. 23 ?
Period Measurement .................................................................. 25 ?
Line Voltage SAG Detection ..................................................... 25 ?
SAG Level Set.............................................................................. 26 ?
Peak Voltage Detection.............................................................. 26 ?
Phase Sequence Detection......................................................... 26 ?
Power-Supply Monitor............................................................... 27 ?
Reference Circuit ........................................................................ 27 ?
Revision History
10/11—Rev. D to Rev. E
Changes to Figure 1.......................................................................... 1
Changes to Figure 41...................................................................... 19
Changes to Figure 60...................................................................... 27
Added Figure 61; Renumbered Sequentially .............................. 27
Changes to Phase Sequence Detection Section .......................... 27
Changes to Power-Supply Monitor Section ................................ 27
Changes to Figure 62...................................................................... 28
Changes to Figure 67...................................................................... 32
Data Sheet
Temperature Measurement ....................................................... 27 ?
Root Mean Square Measurement............................................. 28 ?
Active Power Calculation .......................................................... 30 ?
Reactive Power Calculation ...................................................... 35 ?
Apparent Power Calculation..................................................... 39 ?
Energy Registers Scaling ........................................................... 41 ?
Waveform Sampling Mode ....................................................... 41 ?
Calibration................................................................................... 42 ?
Checksum Register..................................................................... 55 ?
Interrupts..................................................................................... 55 ?
Using the Interrupts with an MCU.......................................... 56 ?
Interrupt Timing ........................................................................ 56 ?
Serial Interface ............................................................................ 56 ?
Serial Write Operation............................................................... 57 ?
Serial Read Operation................................................................ 59 ?
Accessing the On-Chip Registers............................................. 59 ?
Registers........................................................................................... 60 ?
Communications Register......................................................... 60 ?
Operational Mode Register (0x13) .......................................... 64 ?
Measurement Mode Register (0x14) ....................................... 64 ?
Waveform Mode Register (0x15) ............................................. 65 ?
Computational Mode Register (0x16)..................................... 66 ?
Line Cycle Accumulation Mode Register (0x17) ................... 67 ?
Interrupt Mask Register (0x18) ................................................ 68 ?
Interrupt Status Register (0x19)/Reset Interrupt Status
Register (0x1A)........................................................................... 69 ?
Outline Dimensions ....................................................................... 70 ?
Ordering Guide .......................................................................... 70 ?
Changes to Equation 25................................................................. 34
Changes to Figure 69...................................................................... 34
Changes to Table 17 ....................................................................... 62
Change to Table 18 ......................................................................... 64
Changes to Table 24 ....................................................................... 69
Changes to Ordering Guide .......................................................... 70
10/08—Rev. C to Rev. D
Changes to Figure 1...........................................................................1
Changes to Phase Sequence Detection Section and Figure 60. 27
Changes to Figure 68...................................................................... 32
Rev. E | Page 2 of 72
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