Datasheet ADE7768 (Analog Devices) - 8

ADE7768 TYPICAL PERFORMANCE CHARACTERISTICS VDD + 100nF 10
μ
F 1 V K7 602k
Ω
DD U3 2 V2P F1 16 1 4 220V 200
Ω
150nF F2 15 U1 ADE7768 CF 14 2 3 200
Ω
3 V2N K8 40A TO PS2501-1 150nF 40mA 820
Ω
REVP 12 200
Ω
6.2k
Ω
5 V1P + RCLKIN 11 150nF V 350
μΩ
DD 200
Ω
4 V1N 10k
Ω
150nF S0 10 S1 9 7 REF + IN/OUT 100nF 8 1
μ
F SCF AGND DGND 10nF 10nF 10nF 6 13
05331-004 Figure 4. Test Circuit for Performance Curves
1.0 1.0 PF = 1 PF = 1 0.8 ON-CHIP REFERENCE 0.8 EXTERNAL REFERENCE 0.6 0.6 0.4 –40
°
C 0.4 ng) ng) di di a 0.2 a 0.2 +85
°
C 0 0 –0.2 +85
°
C –0.2 +25
°
C +25
°
C RROR (% of Re –0.4 RROR (% of Re E –0.4 E –40
°
C –0.6 –0.6 –0.8 –0.8 –1.0
05331-019
–1.0
05331-021
0.1 1 10 100 0.1 1 10 100 CURRENT CHANNEL (% of Full Scale) CURRENT CHANNEL (% of Full Scale)
Figure 5. Error as a % of Reading over Temperature Figure 7. Error as a % of Reading over Temperature with On-Chip Reference (PF = 1) with External Reference (PF = 1)
1.0 1.0 PF = 0.5 IND PF = 0.5 IND 0.8 ON-CHIP REFERENCE 0.8 EXTERNAL REFERENCE 0.6 –40
°
C, PF = 0.5 IND 0.6 0.4 0.4 ng) ng) di di a 0.2 a 0.2 +25
°
C, PF = 1 +85
°
C, PF = 0.5 IND +25
°
C, PF = 1 0 0 –0.2 –0.2 RROR (% of Re +25
°
C, PF = 0.5 IND –0.4 RROR (% of Re E +85
°
C, PF = 0.5 IND –0.4 E +25
°
C, PF = 0.5 IND –0.6 –0.6 –40
°
C, PF = 0.5 IND –0.8 –0.8 –1.0
05331-020
–1.0
05331-022
0.1 1 10 100 0.1 1 10 100 CURRENT CHANNEL (% of Full Scale) CURRENT CHANNEL (% of Full Scale)
Figure 6. Error as a % of Reading over Temperature Figure 8. Error as a % of Reading over Temperature with On-Chip Reference (PF = 0.5 IND) with External Reference (PF = 0.5 IND) Rev. A | Page 8 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