ade7768 Analog Devices, Inc., ade7768 Datasheet - Page 9

• Manufacturer Part Number: ade7768
• Description: Energy Metering Ic With Integrated Oscillator And Positive Power Accumulation
• Manufacturer: Analog Devices, Inc.

–0.1
–0.2
–0.3
–0.4
–0.5
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
0.5
0.4
0.3
0.2
0.1
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
0
Figure 9. Error as a % of Reading over Input Frequency
0.1
0.1
45
PF = 1
ON-CHIP REFERENCE
PF = 1
EXTERNAL REFERENCE
Figure 10. PSR with On-Chip Reference, PF = 1
Figure 11. PSR with External Reference, PF = 1
CURRENT CHANNEL (% of Full Scale)
CURRENT CHANNEL (% of Full Scale)
50
PF = 0.5 IND
1
1
FREQUENCY (Hz)
5.25V
5.25V
5V
4.75V
5V
4.75V
55
PF = 0.5 CAP
PF = 1
10
10
60
100
100
65
Rev. A | Page 9 of 20
1000
800
600
400
200
40
30
20
10
50
40
30
20
10
0
0
0
–12 –10 –8
–5 –4 –3 –2 –1
DISTRIBUTION CHARACTERISTICS
MEAN = 2.247828
SDs = 1.367176
MIN = –2.09932
MAX = +5.28288
NO. OF POINTS = 100
DISTRIBUTION CHARACTERISTICS
MEAN = –1.563484
SDs = 2.040699
MIN = –6.82969
MAX = +2.6119
NO. OF POINTS = 100
DISTRIBUTION CHARACTERISTICS
MEAN = 0%
SDs = 1.55%
MIN = –11.79%
MAX = +6.08%
NO. OF POINTS = 3387
–10
Figure 14. Part-to-Part CF Deviation from Mean
Figure 12. Channel V1 Offset Distribution
Figure 13. Channel V2 Offset Distribution
–8
–6
–6
DEVIATION FROM MEAN (%)
CHANNEL V1 OFFSET (mV)
CHANNEL V2 OFFSET (mV)
–4
–4
0
–2
–2
1
0
2
0
2
3
2
EXTERNAL REFERENCE
EXTERNAL REFERENCE
EXTERNAL REFERENCE
TEMPERATURE = 25°C
TEMPERATURE = 25°C
TEMPERATURE = 25°C
4
4
4
5
6
6
6
8
8
7
ADE7768
10
10
8
12
9
12