ADE7880
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Changing Phase Voltage Data path.......................................... 30
Power Quality Measurements................................................... 31
Phase Compensation ................................................................. 36
Reference Circuit........................................................................ 38
Digital Signal Processor............................................................. 38
Root Mean Square Measurement............................................. 39
Active Power Calculation.......................................................... 43
Fundamental Reactive Power Calculation.............................. 49
Apparent Power Calculation..................................................... 53
Power Factor Calculation.......................................................... 55
Harmonics Calculations............................................................ 56
Waveform Sampling Mode ....................................................... 64
Energy-to-Frequency Conversion............................................ 64
No Load Condition.................................................................... 69
Checksum Register..................................................................... 71
Interrupts..................................................................................... 72
Serial Interfaces .......................................................................... 73
ADE7880 Quick Setup As Energy Meter................................ 80
ADE7880 Evaluation Board...................................................... 80
Die Version.................................................................................. 80
Silicon Anomaly ............................................................................. 81
ADE7880 Functionality Issues ................................................. 81
Functionality Issues.................................................................... 81
Section 1. ADE7880 Functionality Issues ............................... 82
Registers List ................................................................................... 83
Outline Dimensions..................................................................... 103
Ordering Guide ........................................................................ 103
Applications....................................................................................... 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Functional Block Diagram .............................................................. 3
Specifications..................................................................................... 4
Timing Characteristics ................................................................ 7
Absolute Maximum Ratings.......................................................... 10
Thermal Resistance .................................................................... 10
ESD Caution................................................................................ 10
Pin Configuration and Function Descriptions........................... 11
Typical Performance Characteristics ........................................... 13
Test Circuit ...................................................................................... 18
Terminology .................................................................................... 19
Power Management........................................................................ 20
PSM0—Normal Power Mode (All Parts)................................ 20
PSM1—Reduced Power Mode.................................................. 20
PSM2—Low Power Mode ......................................................... 20
PSM3—Sleep Mode (All Parts) ................................................ 21
Power-Up Procedure.................................................................. 23
Hardware Reset........................................................................... 24
Software Reset Functionality .................................................... 24
Theory of Operation ...................................................................... 25
Analog Inputs.............................................................................. 25
Analog-to-Digital Conversion.................................................. 25
Current Channel ADC............................................................... 26
di/dt Current Sensor and Digital Integrator............................... 28
Voltage Channel ADC ............................................................... 29
REVISION HISTORY
3/12—Rev. 0 to Rev. A
Changes to Figure 95...................................................................... 69
Changes to No Load Condition Section...................................... 69
Changes to Equation 53................................................................. 71
Changes to Figure 100 ................................................................... 74
Changes to Figure 101 and to Figure 102.................................... 75
Changes to SPI-Compatible Interface Section ........................... 76
Changes to HSDC Interface Section............................................ 78
Changes to Figure 109 and to Figure 110.................................... 80
Changes to Silicon Anomaly Section........................................... 81
Changes to Table 48 ....................................................................... 99
Changes to Table 52 ..................................................................... 101
Removed References to + N (Plus Noise) and changed VTHDN
to VTHD and ITHDN to ITHD.................................. Throughout
Changes to Reactive Energy Management Parameter in Table 1.... 4
Changes to Figure 6........................................................................ 11
Changes to Table 7.......................................................................... 12
Changes to Phase Compensation Section................................... 36
Changes to Equation 13................................................................. 39
Changes to Equation 33................................................................. 49
Changes to Fundamental Reactive Energy Calculation Section ... 51
Changes to Figure 80...................................................................... 55
Changes to Figure 85...................................................................... 62
Changes to Energy Registers and CF Outputs for Various
Accumulation Modes Section....................................................... 67
10/11—Revision 0: Initial Version
Rev. A | Page 2 of 104
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