Datasheet ADE9078 (Analog Devices) - 33

Data Sheet ADE9078 ADE9078 xIRMS CURRENT CHANNEL (IA, IB, IC) IF MTEN = 1, xIGAINx, PHASE COMP CHANGES BASED ON xIRMS, MTTHR_Lx AND MTTHR_Hx 0: xIGAINx = xIGAIN0; PHASE COMP = xPHCAL0 1: xIGAINx = xIGAIN1; PHASE COMP = xPHCAL1 2: xIGAINx = xIGAIN2; PHASE COMP = xPHCAL2 3: xIGAINx = xIGAIN3; PHASE COMP = xPHCAL3 4: xIGAINx = xIGAIN4; PHASE COMP = xPHCAL4 MTEN HPFDIS INTEN xIGAIN xIGAINx ADC_ PHASE CURRENT RMS IN REDIRECT TOTAL VA MUX HPF COMP (xIRMS) POWER IB = –IA–IC INTEGRATOR xI_PCF CALCULATION ICONSEL* NOTE: ACC MODE.ICONSEL ONLY AFFECTS IB CHANNEL CALCULATION TOTAL ACTIVE AND REACTIVE POWER IN SINC4 OUTPUT (xI_SINC_DAT) SINC4 + IIR LPF (xI_LPF_DAT) CURRENT CHANNE L (xI_PCF) CALCULATION DATA RANGE DATA RANGE DATA RANGE +1V 0x0400 0470 = 0x0471 15C0 = 0x0474 E650 = FUNDAMENTAL +67,110,000 +74,520,000 +74,770,000 REACTIVE POWER CALCULATION 0V CURRENT PEAK DETECTION –1V 0xFBFF FB90 = 0xFB8E EA40 = 0xFB8B 19B0 = ANALOG INPUT RANGE –67,110,000 –74,520,000 –74,770,000
044
NOT AVAILABLE IN ADE9078 PSM1
14331- Figure 51. Current Channel with Multi-Point Gain and Phase Correction
ADE9078 VOLTAGE CHANNEL xV_PCF WF_SRC FUNDAMENTAL WF_CAP_SEL REACTIVE POWER CALCULATIONS WAVEFORM TOTAL ACTIVE AND REACTIVE POWER BUFFER CALCULATION RESAMPLING ZX_SRC_SEL ZX DETECTION VCONSEL* VA = VA – VB; S P S VB = VA – VC; 100 TOTAL VOLTAGE RMS P REFERENCE VC = VC – VB; VA POWER CALCULATIONS 16 kS 4 kS xVGAIN HPFDIS VB = –VA 011 VP VB = –VA – VC 010 VB = VA – VC 001 Σ-∆ ADC_ V 000 VOLTAGE PEAK IN MODULATOR REDIRECT SINC4 LPF 4:1 HPF DETECTION MUX 4 kSPS VN NOTE: CONSEL SUPPORTS SEVERAL 3-WIRE AND 4-WIRE HARDWARE CONFIGURATIONS VIN SINC4 OUTPUT (xV_SINC_DAT) SINC4 + IIR LPF (xV_LPF_DAT) RESAMPLED WAVEFORM VOLTAGE CHANNE L (xV_PCF) DATA RANGE DATA RANGE DATA RANGE DATA RANGE +1V 0x0400_0470 = 0x0471_15C0 = 0x46B4 = 0x0474_E650 = +67,110,000 +74,520,000 +18,100 +74,770,000 0V 0V 0V 0V 0V –1V 0xFBFF_FB90 = 0xFB8E_EA40 = 0xB94C = 0xFB8B_19B0 = ANALOG INPUT RANGE –67,110,000 –74,520,000 –18,100 –74,770,000
085 31-
NOT AVAILABLE IN ADE9078 PSM1
143 Figure 52. Voltage Channel Datapath Rev. 0 | Page 33 of 107 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TOTAL ENERGY LINEARITY OVER SUPPLY AND TEMPERATURE FUNDAMENTAL ENERGY LINEARITY WITH FIFTH HARMONIC OVER SUPPLY AND TEMPERATURE TOTAL ENERGY ERROR OVER FREQUENCY RMS LINEARITY OVER TEMPERATURE AND RMS ERROR OVER FREQUENCY ENERGY LINEARITY REPEATABILITY TOTAL ENERGY AND RMS LINEARITY WITH INTEGRATOR ON TOTAL ENERGY ERROR OVER FREQUENCY WITH INTEGRATOR ON TEST CIRCUIT TERMINOLOGY THEORY OF OPERATION ADC Overview Analog Input Configuration Fully Differential Inputs Interfacing to Current and Voltage Sensors Internal RF Immunity Filter Modes of Operation Output Data Rates and Format Voltage Reference CRYSTAL OSCILLATOR/EXTERNAL CLOCK Crystal Selection Load Capacitor Calculation Load Capacitor Calculation Example POWER MANAGEMENT Power Modes Power-On Sequence Brownout Detection Reset Changing to PSM2 or PSM3 MEASUREMENTS (NORMAL MODE) Current Channel Current Channel Measurement Update Rates ADC_REDIRECT Multiplexer Current Channel Gain, xIGAIN IB Calculation Using ICONSEL High-Pass Filter Digital Integrator Phase Compensation Multipoint Gain and Phase Calibration Multipoint Gain and Phase Single-Point Gain and Phase Voltage Channel Voltage Channel Measurements Voltage Channel Gain Energy Measurements Overview Per Phase Energy Measurements Update Rate Power-Based and Filter-Based RMS Measurement Algorithms Filter-Based Total RMS Neutral Current RMS, RMS of Sum of Instantaneous Currents Total Active Power Total Reactive Power Total Apparent Power Fundamental Reactive Power Power Factor Energy Accumulation Signed Energy Accumulation Modes Total Active Energy Accumulation Modes Reactive Energy Accumulation Modes No Load Detection No Load Indications Energy Accumulation Details Internal Energy Register Overflow Rate User Energy Register Update Rate, EGYRDY Reloading or Accumulating User Energy Register User Energy Register Overflow Rate Accessing the User Energy Registers Read User Energy Register with Reset User Energy Register Use Models Digital to Frequency Conversion—CFx Output Energy and Phase Selection Configuring the Maximum CF Pulse Output Frequency Configuring the CF Pulse Width CFx Pulse Sign Clearing the CFx Accumulator Disabling the CFx Pulse Output and CFx Interrupt MEASUREMENTS (PSM1) Overview IRMS, VRMS, and Active Power VAR PSM1 Startup Flow from PSM2 and PSM3 PSM1 Startup Flow from PSM0 Power Accumulation Power Accumulation Details Accessing the User Power Registers Power Sign Detection Zero-Crossing Detection Combined Voltage Zero Crossing Zero-Crossing Output Rates Zero-Crossing Timeout Line Period Calculation Angle Measurement Phase Sequence Error Detection 4-Wire Wye and 4-Wire Delta 3-Wire Delta Peak Detection MEASUREMENTS (PSM2) Overview Low Power Comparator KEY FEATURES FLEXIBLE WAVEFORM BUFFER WITH RESAMPLING MULTIPOINT PHASE/GAIN CALIBRATION RMS OF SUM OF INSTANTANEOUS CURRENTS MEASUREMENT TAMPER MODES POWER FACTOR ZERO-CROSSING TIMEOUT DETECTION LINE PERIOD MEASUREMENT ANGLE MEASUREMENT PHASE SEQUENCE ERROR DETECTION QUICK START APPLICATIONS INFORMATION NON-BLONDEL COMPLIANT METERS APPLYING THE ADE9078 TO A 4-WIRE WYE SERVICE APPLYING THE ADE9078 TO A 3-WIRE DELTA SERVICE APPLYING THE ADE9078 TO A NON-BLONDEL COMPLIANT, 4-WIRE WYE SERVICE APPLYING THE ADE9078 TO A NON-BLONDEL COMPLIANT, 4-WIRE DELTA SERVICE SERVICE TYPE SUMMARY ACCESSING ON-CHIP DATA SPI PROTOCOL OVERVIEW SPI WRITE SPI READ SPI BURST READ SPI PROTOCOL CRC CRC Algorithm ADDITIONAL COMMUNICATION VERIFICATION REGISTERS CRC OF CONFIGURATION REGISTERS CONFIGURATION LOCK WAVEFORM BUFFER FIXED DATA RATE WAVEFORMS Waveform Buffer Filling Indication—Fixed Data Rate Samples FIXED DATA RATE WAVEFORMS FILLING AND TRIGGER-BASED MODES Stop When Buffer Is Full Mode Continuous Fill Mode Stop Filling on Trigger Center Capture Around Trigger Save Event Address and Keep Filling RESAMPLED WAVEFORMS CONFIGURING THE WAVEFORM BUFFER BURST READ WAVEFORM BUFFER SAMPLES FROM SPI Example 1: Fixed Data Rate Data, Seven Channel Samples Example 2: Resampled Data, Phase C (I and V Samples) Example 3: Fixed Data Rate Data, Single Address Read Mode Example 4: Resampled Data, Single Address Read Mode SPI CRC when Reading the Waveform Buffer SPI Last Data Register when Reading the Waveform Buffer INTERRUPTS/EVENTS INTERRUPTS (IRQ0\ AND IRQ1\) EVENT\ STATUS BITS IN ADDITIONAL REGISTERS No Load TROUBLESHOOTING SPI DOES NOT WORK PSM2_CFG REGISTER VALUE IS NOT RETAINED WHEN GOING FROM PSM2 OR PSM3 TO PSM0 REGISTER INFORMATION REGISTER DETAILS OUTLINE DIMENSIONS ORDERING GUIDE