Datasheet ADE7953 (Analog Devices) - 5

Data Sheet ADE7953 Parameter Min Typ Max Unit Test Conditions/Comments
ANALOG PERFORMANCE Signal-to-Noise Ratio Current Channel A 74 dB Current Channel B 72 dB Voltage Channel 70 Signal-to-Noise-and-Distortion Ratio Current Channel A, Current Channel B 68 dB Voltage Channel 65 dB Bandwidth (−3 dB) 1.23 kHz CF1 AND CF2 PULSE OUTPUTS Maximum Output Frequency 206.9 kHz Duty Cycle 50 % CF1 or CF2 frequency > 6.25 Hz Active Low Pulse Width 80 ms CF1 or CF2 frequency < 6.25 Hz Jitter 0.04 % CF1 or CF2 frequency = 1 Hz Output High Voltage, VOH 2.4 V ISOURCE = 500 µA at 25°C Output Low Voltage, VOL 0.4 V ISINK = 8 mA at 25°C REFERENCE Nominal 1.2 V at REF pin REF Input Voltage Range 1.19 1.2 1.21 V TMIN to TMax Input Capacitance 10 pF Reference Error ±0.9 mV TA = 25°C Output Impedance 1.2 kΩ Temperature Coefficient 10 50 ppm/°C CLKIN/CLKOUT PINS All specifications CLKIN = 3.58 MHz Input Clock Frequency 3.54 3.58 3.62 MHz Crystal Equivalent Series Resistance 30 200 Ω LOGIC INPUTS—RESET, CLKIN, CS, SCLK, MOSI/SCL/Rx, MISO/SDA/Tx Input High Voltage, VINH 2.4 V VDD = 3.3 V ± 10% Input Low Voltage, VINL 0.8 V VDD = 3.3 V ± 10% Input Current, IIN VIN = 0 V MOSI/SCL/Rx, MISO/SDA/Tx, RESET −10 µA CS, SCLK 1 µA Input Capacitance, CIN 10 pF LOGIC OUTPUTS—IRQ, REVP, ZX, ZX_I, VDD = 3.3 V ± 10% CLKOUT, MOSI/SCL/Rx, MISO/SDA/Tx Output High Voltage, VOH 3.0 V ISOURCE = 800 µA Output Low Voltage, VOL 0.4 V ISINK = 2 mA POWER SUPPLY For specified performance VDD 3.0 V 3.3 V − 10% 3.6 V 3.3 V + 10% IDD 7 9 mA Rev. C | Page 5 of 72 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS SPI Interface Timing SPI Interface Timing Diagram I2C Interface Timing I2C Interface Timing Diagram ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUIT TERMINOLOGY ADE7953 POWER-UP PROCEDURE REQUIRED REGISTER SETTING THEORY OF OPERATION ANALOG INPUTS Current Channel A Current Channel B Voltage Channel ANALOG-TO-DIGITAL CONVERSION Oversampling Noise Shaping Antialiasing Filter CURRENT CHANNEL ADCS di/dt Current Sensor and Digital Integrator VOLTAGE CHANNEL ADC REFERENCE CIRCUIT ROOT MEAN SQUARE MEASUREMENT CURRENT CHANNEL RMS CALCULATION VOLTAGE CHANNEL RMS CALCULATION ACTIVE POWER CALCULATION SIGN OF ACTIVE POWER CALCULATION ACTIVE ENERGY CALCULATION Active Energy Integration Time Under Steady Load Active Energy Line Cycle Accumulation Mode ACTIVE ENERGY ACCUMULATION MODES Signed Accumulation Mode Positive-Only Accumulation Mode Absolute Accumulation Mode REACTIVE POWER CALCULATION SIGN OF REACTIVE POWER CALCULATION REACTIVE ENERGY CALCULATION Reactive Energy Integration Time Under Steady Load Reactive Energy Line Cycle Accumulation Mode REACTIVE ENERGY ACCUMULATION MODES Signed Accumulation Mode Antitamper Accumulation Mode Absolute Accumulation Mode APPARENT POWER CALCULATION APPARENT ENERGY CALCULATION Apparent Energy Integration Time Under Steady Load Apparent Energy Line Cycle Accumulation Mode AMPERE-HOUR ACCUMULATION ENERGY-TO-FREQUENCY CONVERSION PULSE OUTPUT CHARACTERISTICS ENERGY CALIBRATION GAIN CALIBRATION Current Channel Gain Adjustment PHASE CALIBRATION OFFSET CALIBRATION Power Offsets RMS Offsets PERIOD MEASUREMENT INSTANTANEOUS POWERS AND WAVEFORM SAMPLING POWER FACTOR USING THE LINE CYCLE ACCUMULATION MODE TO DETERMINE THE POWER FACTOR POWER FACTOR WITH NO-LOAD DETECTION ANGLE MEASUREMENT NO-LOAD DETECTION SETTING THE NO-LOAD THRESHOLDS ACTIVE ENERGY NO-LOAD DETECTION Active Energy No-Load Interrupt Active Energy No-Load Status Bits REACTIVE ENERGY NO-LOAD DETECTION Reactive Energy No-Load Interrupt Reactive Energy No-Load Status Bits APPARENT ENERGY NO-LOAD DETECTION Apparent Energy No-Load Interrupt Apparent Energy No-Load Status Bits ZERO-CROSSING DETECTION ZERO-CROSSING OUTPUT PINS Voltage Channel Zero Crossing Current Channel Zero Crossing ZERO-CROSSING INTERRUPTS ZERO-CROSSING TIMEOUT ZERO-CROSSING THRESHOLD VOLTAGE SAG DETECTION SETTING THE SAGCYC REGISTER SETTING THE SAGLVL REGISTER VOLTAGE SAG INTERRUPT PEAK DETECTION INDICATION OF POWER DIRECTION REVERSE POWER SIGN INDICATION OVERCURRENT AND OVERVOLTAGE DETECTION SETTING THE OVLVL AND OILVL REGISTERS OVERVOLTAGE AND OVERCURRENT INTERRUPTS ALTERNATIVE OUTPUT FUNCTIONS ADE7953 INTERRUPTS PRIMARY INTERRUPTS (VOLTAGE CHANNEL AND CURRENT CHANNEL A) CURRENT CHANNEL B INTERRUPTS COMMUNICATING WITH THE ADE7953 COMMUNICATION AUTODETECTION LOCKING THE COMMUNICATION INTERFACE SPI INTERFACE I2C INTERFACE I2C Write Operations I2C Read Operations UART INTERFACE UART Read UART Write COMMUNICATION VERIFICATION AND SECURITY WRITE PROTECTION COMMUNICATION VERIFICATION CHECKSUM REGISTER ADE7953 REGISTERS ADE7953 REGISTER DESCRIPTIONS Interrupt Enable and Interrupt Status Registers Current Channel A and Voltage Channel Registers Current Channel B Registers LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE