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ADE7978 Datasheet(PDF) 28 Page - Analog Devices

Part # ADE7978
Description  Isolated Energy Metering Chipset for Polyphase Shunt Meters
PDF  125 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADE7978 Datasheet(HTML) 28 Page - Analog Devices

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ADE7978/ADE7933/ADE7932/ADE7923
Data Sheet
Rev. D | Page 28 of 125
RMS LINEARITY OVER TEMPERATURE AND RMS ERROR OVER FREQUENCY
Figure 28 through Figure 31 were generated using the following conditions: sinusoidal current and voltage with variable amplitudes from
100% of full scale down to 0.033% of full scale. Figure 28 and Figure 30 were obtained using a frequency of 50 Hz; Figure 29 and Figure 31 were
obtained using a variable frequency between 45 Hz and 65 Hz.
1.5
–1.5
–1.0
–0.5
0
0.5
1.0
0.1
1
10
100
PERCENTAGE OF FULL-SCALE CURRENT (%)
TA = –40°C
TA = +25°C
TA = +85°C
Figure 28. Current RMS Error as a Percentage of Reading
over Temperature
0.10
–0.10
–0.08
–0.06
–0.04
–0.02
0
0.02
0.04
0.06
0.08
40
70
65
60
55
50
45
LINE FREQUENCY (Hz)
Figure 29. Current RMS Error as a Percentage of Reading
over Frequency
1.5
–1.5
–1.0
–0.5
0
0.5
1.0
0.1
1
10
100
PERCENTAGE OF FULL-SCALE VOLTAGE (%)
TA = –40°C
TA = +25°C
TA = +85°C
Figure 30. Voltage RMS Error as a Percentage of Reading
over Temperature
0.10
–0.10
–0.08
–0.06
–0.04
–0.02
0
0.02
0.04
0.06
0.08
40
70
65
60
55
50
45
LINE FREQUENCY (Hz)
Figure 31. Voltage RMS Error as a Percentage of Reading
over Frequency



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