Datasheet ADE7761B (Analog Devices) - 3

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ADE7761B SPECIFICATIONS
VDD = 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, on-chip oscillator, TMIN to TMAX = −40°C to +85°C.
Table 1. Parameter Value Unit Test Conditions/Comments
ACCURACY1 Measurement Error2 0.1 % of reading, typ Over a dynamic range of 1000 to 1 Phase Error Between Channels PF = 0.8 Capacitive ±0.05 Degrees, max Phase lead 37° PF = 0.5 Inductive ±0.05 Degrees, max Phase lag 60° AC Power Supply Rejection2 Output Frequency Variation 0.01 %, typ V1A = V1B = V2P = ±100 mV rms DC Power Supply Rejection2 Output Frequency Variation 0.01 %, typ V1A = V1B = V2P = ±100 mV rms FAULT DETECTION2, 3 See the Fault Detection section Fault Detection Threshold Inactive Input ≠ Active Input 6.25 %, typ V1A or V1B active Input Swap Threshold Inactive Input ≠ Active Input 6.25 % of larger, typ V1A or V1B active Accuracy Fault Mode Operation V1A Active, V1B = AGND 0.1 % of reading, typ Over a dynamic range of 1000 to 1 V1B Active, V1A = AGND 0.1 % of reading, typ Over a dynamic range of 1000 to 1 Fault Detection Delay 3 Seconds, typ Swap Delay 3 Seconds, typ MISSING NEUTRAL MODE2, 4 See the Missing Neutral Detection section Missing Neutral Detection Threshold V2P − V2N 59.4 mV peak, min Accuracy Missing Neutral Mode V1A Active, V1B = V2P = AGND 0.1 % of reading, typ Over a dynamic range of 500 to 1 V1B Active, V1A = V2P = AGND 0.1 % of reading, typ Over a dynamic range of 500 to 1 Missing Neutral Detection Delay 3 Seconds, typ ANALOG INPUTS V1A − V1N, V1B − V1N, V2P − V2N Maximum Signal Levels ±660 mV peak, max Differential input 660 mV peak, max Differential input MISCAL − V2N Input Impedance (DC) 790 kΩ, min Bandwidth (−3 dB) 7 kHz, typ ADC Offset Error2 15 mV, typ Uncalibrated error, see the Terminology section for details Gain Error ±4 %, typ External 2.5 V reference Gain Error Match2 ±3 %, typ External 2.5 V reference REFERENCE INPUT REFIN/OUT Input Voltage Range 2.7 V, max 2.5 V + 8% 2.3 V, min 2.5 V − 8% Input Impedance 3 kΩ, min Input Capacitance 10 pF, max ON-CHIP REFERENCE Reference Error ±200 mV, max Temperature Coefficient 30 ppm/°C, typ Current Source 10 μA, max Specification assures that VREF is within ±8% ON-CHIP OSCILLATOR Oscillator Frequency 450 kHz Oscillator Frequency Tolerance ±12 % of reading, typ Temperature Coefficient 30 ppm/°C, typ Specification achieved with 25 ppm/°C max resistor on the RCLKIN pin Rev. 0 | Page 3 of 24 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS Timing Diagram ABSOLUTE MAXIMUM RATINGS PERFORMANCE ISSUES THAT MAY AFFECT BILLING ACCURACY Case 1 Case 2 ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUIT TERMINOLOGY THEORY OF OPERATION POWER SUPPLY MONITOR ANALOG INPUTS Channel V1 (Current Channel) Channel V2 (Voltage Channel) MISCAL Input Typical Connection Diagrams INTERNAL OSCILLATOR ANALOG-TO-DIGITAL CONVERSION Antialias Filter ACTIVE POWER CALCULATION Power Factor Considerations Nonsinusoidal Voltage and Current HPF and Offset Effects DIGITAL-TO-FREQUENCY CONVERSION TRANSFER FUNCTION Frequency Output F1 and Frequency Output F2 Frequency Output CF FAULT DETECTION Fault with Active Input Greater Than Inactive Input Fault with Inactive Input Greater Than Active Input Calibration Concerns MISSING NEUTRAL MODE Important Note for Billing of Active Energy Missing Neutral Detection Missing Neutral Gain Calibration APPLICATIONS INFORMATION INTERFACING TO A MICROCONTROLLER FOR ENERGY MEASUREMENT SELECTING A FREQUENCY FOR AN ENERGY METER APPLICATION Frequency Outputs No-Load Threshold NEGATIVE POWER INFORMATION OUTLINE DIMENSIONS ORDERING GUIDE