Datasheet ADE7759 (Analog Devices) - 3

ADE7759 SPECIFICATIONS1 (AVDD = DVDD = 5 V 5%, AGND = DGND = 0 V, On-Chip Reference, CLKIN = 3.579545 MHz XTAL, TMIN to TMAX = –40 C to +85 C, unless otherwise noted.) Parameter Spec Unit Test Conditions/Comments
ENERGY MEASUREMENT ACCURACY Measurement Bandwidth 14 kHz CLKIN = 3.579545 MHz Measurement Error1 on Channel 1 Channel 2 = 300 mV rms/60 Hz, Gain = 1 Channel 1 Range = 0.5 V Full-Scale Gain = 1 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 2 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 4 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 8 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 16 0.2 % typ Over a Dynamic Range 1000 to 1 Channel 1 Range = 0.25 V Full-Scale Gain = 1 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 2 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 4 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 8 0.2 % typ Over a Dynamic Range 1000 to 1 Gain = 16 0.2 % typ Over a Dynamic Range 1000 to 1 Channel 1 Range = 0.125 V Full-Scale Gain = 1 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 2 0.1 % typ Over a Dynamic Range 1000 to 1 Gain = 4 0.2 % typ Over a Dynamic Range 1000 to 1 Gain = 8 0.2 % typ Over a Dynamic Range 1000 to 1 Gain = 16 0.4 % typ Over a Dynamic Range 1000 to 1 Phase Error1 between Channels ±0.05 ∞ max Line Frequency = 45 Hz to 65 Hz, HPF on AC Power Supply Rejection1 AVDD = DVDD = 5 V + 175 mV rms/120 Hz Output Frequency Variation (CF) 0.2 % typ Channel 1 = 20 mV rms/60 Hz, Gain = 16, Range = 0.5 V Channel 2 = 300 mV rms/60 Hz, Gain = 1 DC Power Supply Rejection1 AVDD = DVDD = 5 V ± 250 mV dc Output Frequency Variation (CF) ±0.3 % typ Channel 1 = 20 mV rms/60 Hz, Gain = 16, Range = 0.5 V Channel 2 = 300 mV rms/60 Hz, Gain = 1 ANALOG INPUTS3 Maximum Signal Levels ±0.5 V max V1P, V1N, V2N, and V2P to AGND Input Impedance (DC) 390 kW min Bandwidth 14 kHz CLKIN/256, CLKIN = 3.579545 MHz Gain Error1, 3 External 2.5 V Reference, Gain = 1 on Channels 1 and 2 Channel 1 Range = 0.5 V Full-Scale ±4 % typ V1 = 0.5 V dc Range = 0.25 V Full-Scale ±4 % typ V1 = 0.25 V dc Range = 0.125 V Full-Scale ±4 % typ V1 = 0.125 V dc Channel 2 ±4 % typ V2 = 0.5 V dc Gain Error Match1 External 2.5 V Reference Channel 1 Range = 0.5 V Full-Scale ±0.3 % typ Gain = 1, 2, 4, 8, 16 Range = 0.25 V Full-Scale ±0.3 % typ Gain = 1, 2, 4, 8, 16 Range = 0.125 V Full-Scale ±0.3 % typ Gain = 1, 2, 4, 8, 16 Channel 2 ±0.3 % typ Gain = 1, 2, 4, 8, 16 Offset Error1 Channel 1 ±20 mV max Gain = 1 Channel 2 ±20 mV max Gain = 1 WAVEFORM SAMPLING Sampling CLKIN/128, 3.579545 MHz/128 = 27.9 kSPS Channel 1 See Channel 1 Sampling Signal-to-Noise plus Distortion 62 dB typ 150 mV rms/60 Hz, Range = 0.5 V, Gain = 2 Bandwidth (–3 dB) 14 kHz CLKIN = 3.579545 MHz Channel 2 See Channel 2 Sampling Signal-to-Noise plus Distortion 52 dB typ 150 mV rms/60 Hz, Gain = 2 Bandwidth (–3 dB) 156 Hz CLKIN = 3.579545 MHz REV. A –3– Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS TERMINOLOGY MEASUREMENT ERROR PHASE ERROR BETWEEN CHANNELS POWER SUPPLY REJECTION ADC OFFSET ERROR GAIN ERROR GAIN ERROR MATCH Typical Performance Characteristics Test Circuits ANALOG INPUTS di/dt CURRENT SENSOR AND DIGITAL INTEGRATOR ZERO CROSSING DETECTION LINE VOLTAGE SAG DETECTION Sag Level Set POWER SUPPLY MONITOR INTERRUPTS Using the ADE7759 Interrupts with an MCU Interrupt Timing TEMPERATURE MEASUREMENT ANALOG-TO-DIGITAL CONVERSION Antialias Filter ADC Transfer Function Reference Circuit CHANNEL 1 ADC Channel 1 ADC Gain Adjust Channel 1 Sampling CHANNEL 1 AND CHANNEL 2 WAVEFORM SAMPLING MODE CHANNEL 2 ADC Channel 2 Sampling PHASE COMPENSATION ACTIVE POWER CALCULATION ENERGY CALCULATION Integration Time under Steady Load POWER OFFSET CALIBRATION ENERGY-TO-FREQUENCY CONVERSION LINE CYCLE ENERGY ACCUMULATION MODE CALIBRATING THE ENERGY METER Calculating the Average Active Power Calibrating the Frequency at CF Energy Meter Display CLKIN FREQUENCY SUSPENDING THE ADE7759 FUNCTIONALITY APPLICATION INFORMATION SERIAL INTERFACE Serial Write Operation Serial Read Operation CHECKSUM REGISTER REGISTER DESCRIPTIONS Communications Register Mode Register (06H) Interrupt Status Register (04H) Reset Interrupt Status Register (05H) CH1OS Register (08H) OUTLINE DIMENSIONS Revision History