ADE7978 datasheet(22/120 Pages) AD

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ADE7978/ADE7933/ADE7932

Data Sheet

Rev. 0 | Page 22 of 120

Figure 18 through Figure 23 were generated using the following conditions: fundamental voltage component in phase with 5th harmonic;

current with a 50 Hz component that has variable amplitudes from 100% of full scale down to 0.033% of full scale and a 5th harmonic with a

constant amplitude of 17% of full scale; power factor equal to 1 or 0 on the fundamental and 5th harmonic. Figure 18, Figure 19, Figure 21,

and Figure 22 were generated using a voltage with a 50 Hz component that has an amplitude of 50% of full scale and a 5th harmonic with an

amplitude of 5% of full scale. Figure 20 and Figure 23 were generated using a voltage with a 50 Hz component that has variable amplitudes

from 100% of full scale down to 0.033% of full scale and a 5th harmonic with an amplitude of 5% of full scale.

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.01

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

TA = –40°C

TA = +25°C

TA = +85°C

Figure 18. Fundamental Active Energy Error as a Percentage of Reading

over Temperature, PF = 1

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.01

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

VDD = 2.97V

VDD = 3.30V

VDD = 3.63V

Figure 19. Fundamental Active Energy Error as a Percentage of Reading

over Power Supply, PF = 1, TA = 25°C

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

TA = –40°C

TA = +25°C

TA = +85°C

Figure 20. Fundamental Current RMS Error as a Percentage of Reading

over Temperature, PF = 1

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.01

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

TA = –40°C

TA = +25°C

TA = +85°C

Figure 21. Fundamental Reactive Energy Error as a Percentage of Reading

over Temperature, PF = 0

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.01

0.1

100

PERCENTAGE OF FULL-SCALE CURRENT (%)

VDD = 2.97V

VDD = 3.30V

VDD = 3.63V

Figure 22. Fundamental Reactive Energy Error as a Percentage of Reading

over Power Supply, PF = 0, TA = 25°C

1.5

–1.5

–1.0

–0.5

0.5

1.0

0.1

100

PERCENTAGE OF FULL-SCALE VOLTAGE (%)

TA = –40°C

TA = +25°C

TA = +85°C

Figure 23. Fundamental Voltage RMS Error as a Percentage of Reading

over Temperature, PF = 1

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