Datasheet ADE7753 (Analog Devices) - 3

ADE7753 REVISION HISTORY 1/10—Rev. B to Rev C 6/04—Rev. 0 to Rev A
Changes to Figure 1 ... 1 Changes IEC Standards .. 1 Changes to t6 Parameter (Table 2) ... 6 Changes to Phase Error Between Channels Definition ... 7 Added Endnote 1 to Table 4 ... 9 Changes to Figure 24 .. 13 Changes to Figure 32 .. 16 Changes to CH2OS Register .. 16 Changes to Period Measurement Section .. 19 Change to the Period Measurement Section ... 18 Changes to Temperature Measurement Section ... 22 Change to Temperature Measurement Section ... 21 Changes to Figure 51 .. 24 Changes to Figure 69 .. 31 Changes to Channel 1 RMS Calculation Section .. 25 Changes to Figure 71 .. 33 Added Table 7 .. 25 Changes to the Apparent Energy Section .. 36 Changes to Channel 2 RMS Calculation Section .. 26 Changes to Energies Scaling Section .. 37 Added Table 8 .. 26 Changes to Calibration Section ... 37 Changes to Figure 64 .. 29 Changes to Apparent Power Calculation Section ... 35
8/03—Revision 0: Initial Version 1/09—Rev. A to Rev B
Changes to Features Section .. 1 Changes to Zero-Crossing Detection Section and Period Measurement Section ... 19 Changes to Channel 1 RMS Calculation Section, Channel 1 RMS Offset Compensation Section, and Equation 4 ... 25 Changes to Figure 56 and Channel 2 RMS Calculation Section .. 26 Changes to Figure 57 .. 27 Changes to Energy Calculation Section ... 30 Changes to Energy-to-Frequency Conversion Section .. 31 Changes to Apparent Energy Calculation Section.. 36 Changes to Line Apparent Energy Accumulation Section .. 37 Changes to Table 10 .. 52 Changes to Table 12 .. 56 Changes to Table 13 .. 57 Changes to Ordering Guide ... 59 Rev. C | Page 3 of 60 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION TERMINOLOGY PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ANALOG INPUTS di/dt CURRENT SENSOR AND DIGITAL INTEGRATOR ZERO-CROSSING DETECTION Zero-Crossing Timeout PERIOD MEASUREMENT POWER SUPPLY MONITOR LINE VOLTAGE SAG DETECTION Sag Level Set PEAK DETECTION Peak Level Set Peak Level Record ADE7753 INTERRUPTS Using the ADE7753 Interrupts with an MCU Interrupt Timing TEMPERATURE MEASUREMENT ADE7753 ANALOG-TO-DIGITAL CONVERSION Antialias Filter ADC Transfer Function ADE7753 Reference Circuit CHANNEL 1 ADC Channel 1 Sampling Channel 1 RMS Calculation Channel 1 RMS Offset Compensation CHANNEL 2 ADC Channel 2 Sampling Channel 2 RMS Calculation Channel 2 RMS Offset Compensation PHASE COMPENSATION ACTIVE POWER CALCULATION ENERGY CALCULATION Integration Time under Steady Load POWER OFFSET CALIBRATION ENERGY-TO-FREQUENCY CONVERSION LINE CYCLE ENERGY ACCUMULATION MODE POSITIVE-ONLY ACCUMULATION MODE NO-LOAD THRESHOLD REACTIVE POWER CALCULATION SIGN OF REACTIVE POWER CALCULATION APPARENT POWER CALCULATION Apparent Power Offset Calibration APPARENT ENERGY CALCULATION Integration Times under Steady Load LINE APPARENT ENERGY ACCUMULATION ENERGIES SCALING CALIBRATING AN ENERGY METER BASED ON THE ADE7753 Watt Gain Calibrating Watt Gain Using a Reference Meter Example Calibrating Watt Gain Using an Accurate Source Example Watt Offset Calibrating Watt Offset Using a Reference Meter Example Calibrating Watt Offset with an Accurate Source Example Phase Calibration Calibrating Phase Using a Reference Meter Example Calibrating Phase with an Accurate Source Example VRMS and IRMS Calibration Apparent Energy Reactive Energy CLKIN FREQUENCY SUSPENDING ADE7753 FUNCTIONALITY CHECKSUM REGISTER ADE7753 SERIAL INTERFACE ADE7753 Serial Write Operation ADE7753 Serial Read Operation ADE7753 REGISTERS ADE7753 REGISTER DESCRIPTIONS COMMUNICATIONS REGISTER MODE REGISTER (0x09) INTERRUPT STATUS REGISTER (0x0B), RESET INTERRUPT STATUS REGISTER (0x0C), INTERRUPT ENABLE REGISTER (0x0A) CH1OS REGISTER (0x0D) OUTLINE DIMENSIONS ORDERING GUIDE