Datasheet ADE7854, ADE7858, ADE7868, ADE7878 (Analog Devices) - 4

ADE7854/ADE7858/ADE7868/ADE7878 Data Sheet
Changes to Line Cycle Reactive Energy Accumulation Mode
3/10—Rev. 0 to Rev. A
Section and to Figure 67 .. 53 Added ADE7854, ADE7858, and ADE7878 ... Universal No Load Detection Based On Total Active, Reactive Powers Reorganized Layout .. Universal Section .. 61 Added Table 1, Renumbered Sequentially ... 1 Change to Equation 50 ... 63 Added Figure 1, Renumbered Sequentially ... 3 Changes to the HSDC Interface Section ... 70 Added Figure 2 ... 4 Changes to Figure 87 and Figure 88 ... 71 Added Figure 3 ... 5 Changes to Figure 89 .. 72 Changes to Specifications Section ... 7 Changes to Table 30 .. 77 Changes to Figure 9 and changes to Table 8 .. 14 Changes to Table 46 .. 88 Changes to Typical Performance Characteristics Section .. 16
11/10—Rev. B to Rev. C
Changes to Figure 22 .. 18 Change to Signal-to-Noise-and-Distortion Ratio, SINAD Changes to the Power Management Section .. 20 Parameter, Table 1 ... 9 Changes to the Theory of Operation Section ... 25 Changes to Figure 18 .. 18 Changes to Figure 31 and Figure 32... 27 Changes to Figure 22 .. 19 Change to Equation 28 .. 47 Changes to Silicon Anomaly Section ... 72 Changes to Figure 83 .. 66 Added Table 28 to Silicon Anomaly Section ... 73 Changes to Figure 86 .. 68 Changes to the Registers List Section .. 72
8/10—Rev. A to Rev. B
Changes to Ordering Guide .. 91 Changes to Figure 1 .. 4
2/10—Revision 0: Initial Version
Changes to Figure 2 .. 5 Changes to Figure 3 .. 6 Changes to Figure 4 .. 7 Change to Table 8 ... 16 Changes to Power-Up Procedure Section ... 23 Changes to Equation 6 and Equation 7 ... 33 Changes to Equation 17 ... 43 Changes to Active Power Offset Calibration Section .. 45 Changes to Figure 63 .. 46 Changes to Reactive Power Offset Calibration Section ... 49 Changes to Figure 82 .. 65 Added Silicon Anomaly Section, Renumbered Tables Sequentially ... 71 Rev. H | Page 4 of 100 Document Outline Features Applications General Description Table of Contents Revision History Functional Block Diagrams Specifications Timing Characteristics Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Test Circuit Terminology Power Management PSM0—Normal Power Mode (All Parts) PSM1—Reduced Power Mode (ADE7868, ADE7878 Only) PSM2—Low Power Mode (ADE7868, ADE7878 Only) PSM3—Sleep Mode (All Parts) Power-Up Procedure Hardcore Reset Software Reset Functionality Theory of Operation Analog Inputs Analog-to-Digital Conversion Antialiasing Filter ADC Transfer Function Current Channel ADC Current Waveform Gain Registers Current Channel HPF Current Channel Sampling di/dt Current Sensor and Digital Integrator Voltage Channel ADC Voltage Waveform Gain Registers Voltage Channel HPF Voltage Channel Sampling Changing Phase Voltage Datapath POWER QUALITY MEASUREMENTS Zero-Crossing Detection Zero-Crossing Timeout Phase Sequence Detection Time Interval Between Phases Period Measurement Phase Voltage Sag Detection SAG Level Set Peak Detection Overvoltage and Overcurrent Detection Overvoltage and Overcurrent Level Set Neutral Current Mismatch—ADE7868, ADE7878 Phase Compensation Reference Circuit Digital Signal Processor Root Mean Square Measurement Current RMS Calculation Current RMS Offset Compensation Current Mean Absolute Value Calculation—ADE7868 and ADE7878 Only Current MAV Gain and Offset Compensation Voltage Channel RMS Calculation Voltage RMS Offset Compensation Active Power Calculation Total Active Power Calculation Fundamental Active Power Calculation—ADE7878 Only Active Power Gain Calibration Active Power Offset Calibration Sign of Active Power Calculation Active Energy Calculation Integration Time Under Steady Load Energy Accumulation Modes Line Cycle Active Energy Accumulation Mode Reactive Power Calculation—ADE7858, ADE7868, ADE7878 Only Reactive Power Gain Calibration Reactive Power Offset Calibration Sign of Reactive Power Calculation Reactive Energy Calculation Integration Time Under A Steady Load Energy Accumulation Modes Line Cycle Reactive Energy Accumulation Mode Apparent Power Calculation Apparent Power Gain Calibration Apparent Power Offset Calibration Apparent Power Calculation Using VNOM Apparent Energy Calculation Integration Time Under Steady Load Energy Accumulation Mode Line Cycle Apparent Energy Accumulation Mode Waveform Sampling Mode Energy-to-Frequency Conversion Synchronizing Energy Registers with CFx Outputs CF Outputs for Various Accumulation Modes Sign of Sum-of-Phase Powers in the CFx Datapath No Load Condition No Load Detection Based On Total Active, Reactive Powers No Load Detection Based on Fundamental Active and Reactive Powers—ADE7878 Only No Load Detection Based on Apparent Power Checksum Register Interrupts Using the Interrupts with an MCU Serial Interfaces Serial Interface Choice I2C-Compatible Interface I2C Write Operation I2C Read Operation SPI-Compatible Interface SPI Read Operation SPI Write Operation HSDC Interface Quick Setup as Energy Meter Layout Guidelines Crystal Circuit ADE7878 Evaluation Board Die Version Silicon Anomaly ADE7854/ADE7858/ADE7868/ADE7878 Functionality Issues Functionality Issues SECTION 1. ADE7854/ADE7858/ADE7868/ADE7878 Functionality Issues Registers List Outline Dimensions Ordering Guide