Datasheet ADE7854, ADE7858, ADE7868, ADE7878 (Analog Devices) - 21

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Data Sheet ADE7854/ADE7858/ADE7868/ADE7878 TEST CIRCUIT
Note that in Figure 23, the PM1 and PM0 pins are pulled up internally to 3.3 V. Select the mode of operation by using a microcontroller to programmatically change the pin values.
3.3V + 10µF 0.1µF + + 4.7µF 0.22µF 4.7µF 0.22µF 24 26 5 DD DD DD 3.3V 2 PM0 V AV DV SS/HSA 39 3 PM1 10kΩ 1µF MOSI/SDA 38 1kΩ 4 RESET MISO/HSD 37 7 22nF IAP SCLK/SCL 36 3.3V 22nF 8 IAN CF3/HSCLK 35 9 IBP 1kΩ 10kΩ SAME AS CF2 34 IAP, IAN 12 IBN ADE78xx SAME AS CF1 33 1.5kΩ CF2 13 ICP SAME AS 32 IAP, IAN IRQ1 14 ICN 1kΩ 22nF IRQ0 29 18 VN REFIN/OUT 17 19 VCP + CL2 4.7µF 0.1µF 1kΩ 22nF CLKOUT 28 SAME AS 22 VBP VCP 5MΩ 16.384MHz SAME AS 23 VAP VCP ND ND CLKIN 27 DG AG CL1 6 25
099 08510- Figure 23. Test Circuit Rev. H | Page 21 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