Datasheet ADE7768 (Analog Devices) - 9

ADE7768 0.5 40 DISTRIBUTION CHARACTERISTICS 0.4 MEAN = 2.247828 EXTERNAL REFERENCE SDs = 1.367176 TEMPERATURE = 25
°
C MIN = –2.09932 0.3 MAX = +5.28288 30 NO. OF POINTS = 100 0.2 PF = 0.5 IND PF = 1 0.1 NCY 0 UE 20 Q –0.1 FRE –0.2 ERROR (% of Reading) PF = 0.5 CAP 10 –0.3 –0.4 –0.5
05331-018 05331-025
0 45 50 55 60 65 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 FREQUENCY (Hz) CHANNEL V1 OFFSET (mV)
Figure 9. Error as a % of Reading over Input Frequency Figure 12. Channel V1 Offset Distribution
1.0 50 PF = 1 DISTRIBUTION CHARACTERISTICS 0.8 ON-CHIP REFERENCE MEAN = –1.563484 SDs = 2.040699 MIN = –6.82969 EXTERNAL REFERENCE 0.6 40 MAX = +2.6119 TEMPERATURE = 25
°
C NO. OF POINTS = 100 0.4 5.25V ding) a 0.2 30 5V NCY 0 UE Q –0.2 4.75V 20 FRE RROR (% of Re –0.4 E –0.6 10 –0.8 –1.0
05331-023
0
05331-026
0.1 1 10 100 –12 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 CURRENT CHANNEL (% of Full Scale) CHANNEL V2 OFFSET (mV)
Figure 10. PSR with On-Chip Reference, PF = 1 Figure 13. Channel V2 Offset Distribution
1.0 1000 PF = 1 DISTRIBUTION CHARACTERISTICS 0.8 EXTERNAL REFERENCE MEAN = 0% EXTERNAL REFERENCE SDs = 1.55% TEMPERATURE = 25
°
C MIN = –11.79% 0.6 800 MAX = +6.08% NO. OF POINTS = 3387 0.4 5.25V ding) a 0.2 600 5V NCY 0 UE Q –0.2 4.75V 400 FRE RROR (% of Re –0.4 E –0.6 200 –0.8 –1.0
05331-024
0
05331-027
0.1 1 10 100 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 CURRENT CHANNEL (% of Full Scale) DEVIATION FROM MEAN (%)
Figure 11. PSR with External Reference, PF = 1 Figure 14. Part-to-Part CF Deviation from Mean Rev. A | Page 9 of 20 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION TERMINOLOGY PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS FUNCTIONAL DESCRIPTION THEORY OF OPERATION Power Factor Considerations Nonsinusoidal Voltage and Current ANALOG INPUTS Channel V1 (Current Channel) Channel V2 (Voltage Channel) Typical Connection Diagrams POWER SUPPLY MONITOR HPF and Offset Effects Digital-to-Frequency Conversion Connecting to a Microcontroller for Energy Measurement Power Measurement Considerations INTERNAL OSCILLATOR (OSC) TRANSFER FUNCTION Frequency Outputs F1 and F2 Example Frequency Output CF SELECTING A FREQUENCY FOR AN ENERGY METER APPLICATION Frequency Outputs NO-LOAD THRESHOLD NEGATIVE POWER INFORMATION EVALUATION BOARD AND REFERENCE DESIGN BOARD OUTLINE DIMENSIONS ORDERING GUIDE