ADE7761BTYPICAL PERFORMANCE CHARACTERISTICS1.01.0PF = 1GAIN = 16ON-CHIP REFERENCEON-CHIP REFERENCE0.80.80.60.60.4–40°C0.4PF = –0.50.20.2R+25°CR00RRORROEE% –0.2% –0.2+85°CPF = +1–0.4–0.4PF = +0.5–0.6–0.6–0.8 04 0 –0.8 7- –1.0 679 0 –1.00.11101000.1110100 07 0 7- CURRENT (% of Full Scale)CURRENT (% of Full Scale) 79 06 Figure 4. Active Power Error As a Percentage of Reading Figure 7. Active Power Error As a Percentage of Reading with Gain = 1 and Internal Reference over Power Factor with Gain = 16 and Internal Reference 1.01.0PF = 1GAIN = 16ON-CHIP REFERENCEON-CHIP REFERENCE0.80.80.60.6–40°C; PF = 0.50.4+85°C; PF = 0.50.45.25V0.20.2RRO5.00VR0RO0RR4.75V% E –0.2% E –0.2+25°C; PF = 1–0.4+25°C; PF = 0.5–0.4–0.6–0.6–0.8–0.8–1.0–1.0 8 0.1110100 05 0 0.1110100 -10 7- CURRENT (% of Full Scale) 79 CURRENT (% of Full Scale) 797 6 06 0 Figure 5. Active Power Error As a Percentage of Reading Figure 8. Active Power Error As a Percentage of Reading over Power Factor with Gain = 1 and Internal Reference over Power Supply with Gain = 1 and Internal Reference 1.01.0PF = 1, GAIN = 16ON-CHIP REFERENCEON-CHIP REFERENCE0.80.80.6–40°C0.6+25°C0.40.4–40°C0.20.2RRO+25°CR00RRRO E% E –0.2+85°C% –0.2+85°C–0.4–0.4–0.6–0.6–0.8–0.8–1.0–1.0 9 0 0.1110100 06 0 0.1110100 1 7- 7- CURRENT (% of Full Scale) 79 CURRENT (% of Full Scale) 79 06 06 Figure 6. Active Power Error As a Percentage of Reading Figure 9. Ampere Hour Error As a Percentage of Reading with Gain = 16 and Internal Reference in Missing Neutral Mode with Gain = 1 and Internal Reference Rev. 0 | Page 8 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