ADE7763ARS Analog Devices Inc, ADE7763ARS Datasheet - Page 34

• Manufacturer Part Number: ADE7763ARS
• Description: IC ENERGY METER 1PHASE 20SSOP
• Manufacturer: Analog Devices Inc

Specifications of ADE7763ARS

• Input Impedance: 390 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.8V
• Current - Supply: 3mA
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP (0.200", 5.30mm Width)
• Meter Type: Single Phase
• For Use With: EVAL-ADE7763ZEB - BOARD EVALUATION FOR ADE7763
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ADE7763
ENERGIES SCALING
The ADE7763 provides measurements of active and apparent
energies. These measurements do not have the same scaling and
therefore cannot be compared directly to each other.
Table 7. Energies Scaling
Integrator on at 50 Hz
Integrator off at 50 Hz
Integrator on at 60 Hz
Integrator off at 60 Hz
CALIBRATING AN ENERGY METER
The ADE7763 provides gain and offset compensation for active
and apparent energy calibration. Its phase compensation corrects
phase error in active and apparent energy. If a shunt is used,
offset and phase calibration may not be required. A reference
meter or an accurate source can be used to calibrate
the ADE7763.
When using a reference meter, the ADE7763 calibration output
frequency, CF, is adjusted to match the frequency output of the
reference meter. A pulse output is only provided for the active
Active
Apparent
Active
Apparent
Active
Apparent
Active
Apparent
PF = 1
Wh
Wh × 0.848
Wh
Wh × 0.848
Wh
Wh × 0.827
Wh
Wh × 0.827
WATT/VA GAIN CALIBRATION
PF = 0.707
Wh × 0.707
Wh × 0.848
Wh × 0.707
Wh × 0.848
Wh × 0.707
Wh × 0.827
Wh × 0.707
Wh × 0.827
Figure 70. Apparent and Active Energy Calibration
RMS CALIBRATION
PF = 0
0
Wh × 0.848
0
Wh × 0.848
0
Wh × 0.827
0
Wh × 0.827
Rev. B | Page 34 of 56
WATT OFFSET CALIBRATION
energy measurement in the ADE7763. If a reference meter is
used to calibrate the VA, then additional code must be written
in a microprocessor to produce a pulsed output for this
quantity. Otherwise, VA calibration requires an accurate source.
The ADE7763 provides a line cycle accumulation mode for
calibration using an accurate source. In this method, the active
energy accumulation rate is adjusted to produce a desired CF
frequency. The benefit of using this mode is that the effect of the
ripple noise on the active energy is eliminated. Up to 65,535 half
line cycles can be accumulated, therefore providing a stable
energy value to average. The accumulation time is calculated
from the line cycle period, measured by the period register, and
the number of half line cycles in the accumulation, fixed by the
LINECYC register.
Current and voltage rms offset calibration removes apparent
energy offset. A gain calibration is also provided for apparent
energy. Figure 70 shows an optimized calibration flow for active
energy, rms, and apparent energy.
Active and apparent energy gain calibrations can take place
concurrently, with a read of the accumulated apparent energy
register following that of the accumulated active energy register.
Figure 69 shows the calibration flow for the active energy
portion of the ADE7763.
WATT GAIN CALIBRATION
Figure 69. Active Energy Calibration
PHASE CALIBRATION
WATT OFFSET CALIBRATION
PHASE CALIBRATION