ADE7763ARS Analog Devices Inc, ADE7763ARS Datasheet - Page 37

• 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

Equation 43 describes the relationship between the expected
LAENERGY value and the LAENERGY measured in the test
condition:
The nominal LAENERGY reading, LAENERGY
LAENERGY reading with the test current applied. The expected
LAENERGY reading is calculated from the following equation:
WGAIN = INT
Figure 72. Calibrating Watt Gain Using an Accurate Source
SET HALF LINE CYCLES FOR ACCUMULATION
WRITE CFDEN VALUE TO CFDEN REGISTER
CALCULATE CFDEN VALUE FOR DESIGN
CALCULATE WGAIN. SEE EQUATION 43.
ENABLE LINE CYCLE ACCUMULATION
ACCUMULATION ADDR. 0x09 = 0x0080
READ LINE ACCUMULATION ENERGY
WRITE WGAIN VALUE TO THE WGAIN
SET I
IN LINECYC REGISTER ADDR. 0x1C
RESET THE INTERRUPT STATUS
RESET THE INTERRUPT STATUS
INTERRUPT ADDR. 0x0A = 0x04
READ REGISTER ADDR. 0x0C
READ REGISTER ADDR. 0x0C
SET MODE FOR LINE CYCLE
⎛
⎜
⎜
⎝
TEST
REGISTER: ADDR. 0x12
⎛
⎜
⎜
⎝
ADDR. 0x15 = CFDEN
LAENERGY
LAENERGY
= I
INTERRUPT?
INTERRUPT?
ADDR. 0x04
YES
YES
b
, V
TEST
= V
IB
IB
NOM
(
(
expected
nominal
, PF = 1
NO
NO
)
)
−
1
⎞
⎟
⎟
⎠
IB(nominal)
×
2
12
⎞
⎟
⎟
⎠
, is the
(43)
Rev. B | Page 37 of 56
where CF
accumulation time is calculated from Equation 33, and the line
period is determined from the period register according to
Equation 34.
For this example:
Meter Constant:
Test Current:
Line Voltage:
Line Frequency:
Half Line Cycles:
CF Numerator:
CF Denominator:
Energy Reading at Base Current:
Period Register Reading:
Clock Frequency:
CF
LAENERGY
expected
LAENERGY
INT
CF
LAENERGY
INT
LAENERGY
INT
⎛
⎜
⎜
⎜
⎜
⎜
⎝
INT
. 3
CF
200
IB(expected)
is calculated to be 1.9556 Hz according to Equation 30.
⎛
⎜
⎜
⎜
⎜
⎜
⎝
⎛
⎜
⎜
⎜
⎜
⎝
IB
(
IB(expected)
19186
. 1
CF
(
imp/Wh
expected
9556
expected
IB
(Hz) =
(
expected
3600
.
) 4
IB(expected)
IB(expected)
)
IB(expected)
(Hz) is calculated from Equation 30,
×
CFNUM
is calculated to be 19186 using Equation 44.
CFDEN
×
=
2000
LINECYC
×
19186
)
s/h
CFNUM
220
CFDEN
×
Accumulati
2 /
=
=
=
V
+
+
×
MeterConstant(imp/Wh) = 3.2
I
V
f
LINECYC
CFNUM = 0
CFDEN = 489
PERIOD = 8959
CLKIN = 3.579545 MHz
×
1
LAENERGY
1
l
b
8959
489
nominal
= 50 Hz
10
IB
= 10 A
+
×
+
1
WDIV
1
2 /
1
A
+
×
×
×
= 220 V
1
×
on
WDIV
8
PERIOD
cos(
/(
IB
Time
. 3
= 2000
IB (nominal)
579545
ϕ
)
(s)
= 1.9556 Hz
×
⎞
⎟
⎟
⎟
⎟
⎟
⎠
/ 8
×
= 17174
ADE7763
CLKIN
10
6
)
⎞
⎟
⎟
⎟
⎟
⎠
1
(44)
=
⎞
⎟
⎟
⎟
⎟
⎟
⎠