ADE7763ARS Analog Devices Inc, ADE7763ARS Datasheet - Page 29
ADE7763ARS
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADE7763ARS
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
ADE7763ARSZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
ADE7763ARSZRL
Manufacturer:
ADI/亚德诺
Quantity:
20 000
The active power signal (output of LPF2) can be rewritten as
where f
From Equation 13,
Note that in Equation 19 there is a small ripple in the energy
calculation due to a sin(2ωt) component. This is shown graphi-
cally in Figure 60. The active energy calculation is represented
by the dashed, straight line and is equal to V × I × t. The sinu-
soidal ripple in the active energy calculation is also shown.
Because the average value of a sinusoid is 0, the ripple does not
E
p
(
(
L
t
t
is the line frequency, for example, 60 Hz.
)
)
=
=
VI
VIt
−
−
⎡
⎢
⎢
⎢
⎢
⎢
⎢
⎣
⎡
⎢
⎢
⎢
⎢
⎢
⎢
⎣
CHANNEL 2
4
1
π
OUTPUT
+
FROM
FROM
f
⎛
⎜
⎝
LPF2
ADC
VI
L
2
8
9 .
f
1
L
VI
+
APOS[15:0]
⎞
⎟
⎠
⎛
⎜
⎝
2
LPF1
2
8
⎤
⎥
⎥
⎥
⎥
⎥
⎥
⎦
9 .
f
×
L
cos(
⎞
⎟
⎠
WGAIN[11:0]
2
⎤
⎥
⎥
⎥
⎥
⎥
⎥
⎦
4
ZERO CROSSING
Figure 61. Energy Calculation Line Cycle Energy Accumulation Mode
×
π
DETECTION
sin(
f
L
4
t
)
π
f
L
t
WDIV[7:0]
)
%
LINECYC[15:0]
CALIBRATION
CONTROL
Rev. A | Page 29 of 56
+
(18)
(19)
+
contribute to the energy calculation over time. However, the
ripple might be observed in the frequency output, especially at
higher output frequencies. The ripple becomes larger as a
percentage of the frequency at larger loads and higher output
frequencies. This occurs because the integration or averaging
time in the energy-to-frequency conversion process is shorter at
higher output frequencies. Consequently, some of the sinusoidal
ripple in the energy signal is observable in the frequency output.
Choosing a lower output frequency at CF for calibration can
significantly reduce the ripple. Also, averaging the output
frequency by using a longer gate time for the counter achieves
the same results.
48
23
LAENERGY[23:0]
E(t)
–
Figure 60. Output Frequency Ripple
0
4×π×f
ACCUMULATE ACTIVE
ENERGY IN INTERNAL
REGISTER AND UPDATE
THE LAENERGY REGISTER
AT THE END OF LINECYC
LINE CYCLES
L
t
Vlt
(1+2×f
VI
L
/8. 9Hz )
0
sin(4×π×f
L
×t)
ADE7763