Datasheet AD71056 (Analog Devices) - 9

AD71056 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 g 0.2 in PF = 0.5 IND 0.1 PF = 1 Y C f Read N E o 0 U 20 % Q E R ( –0.1 FR RRO –0.2 E PF = 0.5 CAP 10 –0.3 –0.4
9 12 00 0 6- 6- 63 63
–0.5
05
0
05
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 EXTERNAL REFERENCE 0.6 40 MIN = –6.82969 TEMPERATURE = 25°C MAX = +2.6119 ) NO. OF POINTS = 100 g 0.4 in 5.25V 0.2 Y 30 C f Read 5V N E o 0 U % Q E R ( –0.2 4.75V 20 FR RRO –0.4 E –0.6 10 –0.8
10 0 13 0 6- 6- 63 63
–1.0
05
0
05
0.1 1 10 100 –12 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 CURRENT CHANNE L (% 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 0.6 MIN = –11.79% 800 MAX = +6.08% ) NO. OF POINTS = 3387 g 0.4 5.25V in 0.2 Y 600 C f Read 5V N E o 0 U % Q E R ( –0.2 4.75V 400 FR RRO –0.4 E –0.6 200 –0.8
1 1 0 14 0 6- 6- 63 63
–1.0
05
0
05
0.1 1 10 100 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 CURRENT CHANNE L (% of Full Scale) DEVIATION FROM MEAN (%)
Figure 11. PSR with External Reference, PF = 1 Figure 14. Part-to-Part CF Distribution from Mean of CF Rev. A | Page 9 of 20 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS Timing Diagram ABSOLUTE MAXIMUM RATINGS ESD CAUTION TERMINOLOGY PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER FACTOR CONSIDERATIONS NONSINUSOIDAL VOLTAGE AND CURRENT APPLICATIONS 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 Frequency Output CF SELECTING A FREQUENCY FOR AN ENERGY METER APPLICATION Frequency Outputs NO LOAD THRESHOLD NEGATIVE POWER INFORMATION OUTLINE DIMENSIONS ORDERING GUIDE