Datasheet ADE7761B (Analog Devices) - 8

ADE7761B TYPICAL PERFORMANCE CHARACTERISTICS 1.0 1.0 PF = 1 GAIN = 16 ON-CHIP REFERENCE ON-CHIP REFERENCE 0.8 0.8 0.6 0.6 0.4 –40°C 0.4 PF = –0.5 0.2 0.2 R +25°C R 0 0 RRO RRO E E % –0.2 % –0.2 +85°C PF = +1 –0.4 –0.4 PF = +0.5 –0.6 –0.6 –0.8
04 0
–0.8
7-
–1.0
679 0
–1.0 0.1 1 10 100 0.1 1 10 100
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
1.0 1.0 PF = 1 GAIN = 16 ON-CHIP REFERENCE ON-CHIP REFERENCE 0.8 0.8 0.6 0.6 –40°C; PF = 0.5 0.4 +85°C; PF = 0.5 0.4 5.25V 0.2 0.2 R R O 5.00V R 0 RO 0 R R 4.75V % 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
0.1 1 10 100
05 0
0.1 1 10 100
-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
1.0 1.0 PF = 1, GAIN = 16 ON-CHIP REFERENCE ON-CHIP REFERENCE 0.8 0.8 0.6 –40°C 0.6 +25°C 0.4 0.4 –40°C 0.2 0.2 R R O +25°C R 0 0 R RRO 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
0.1 1 10 100
06 0
0.1 1 10 100
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