71M6515H-IGT/F Maxim Integrated Products, 71M6515H-IGT/F Datasheet - Page 27

• Manufacturer Part Number: 71M6515H-IGT/F
• Description: IC ENERGY METER AFE 3PH 64-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of 71M6515H-IGT/F

• Mounting Style: SMD/SMT
• Package / Case: LQFP-64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

We calculate PHADJ from φ
Finally, we calculate the new calibration current gain coefficient, including compensation for a slight gain increase in the phase
calibration circuit.
Calibration with Five Measurements
The five measurement method provides more orthogonality between the gain and phase error derivations. This method
involves measuring E
16384, PHADJ_A = 0..
First, calculate A
1.
Calculate A
2.
3.
4.
5.
6.
Use above results along with E
7.
8.
Page: 27 of 60
CAL
PHADJ
_
E
E
E
E
=
E
=
A
A
A
I
180
XI
0
60
300
NEW
XV
0
XV
A
A
=
=
+
XI
=
XV
XV
=
A
A Maxim Integrated Products Brand
=
=
=
2
from E
E
IV
XI
(
=
IV
A
A
20
IV
180
E
E
IV
XI
XI
CAL
XV
=
A
0



V
A
XV
A
1 (
+
A
A
XV
=
cos(
cos(
A
from E
E
+
0
XV
XV
E
XV
−
XI
IV
0
cos(
2
1
and E
2
V
IV
_
180
A
, E
IV
IV
+
2
cos(
A
tan(
A
φ
φ
A
A
XI
I
cos(
−
)
XV
XI
E
φ
cos(
0
XI
S
XI
S
9
V
cos(
cos(
, E
:
cos(
180
2
)
S
)
)
180
S
cos(
φ
φ
1
A
cos(
cos(
sin(
)
, the desired phase lag:
+
−
+
) 0
180
S
S
+
:
XI
60
+
1
180
60
1 )
)
−
A
A
0
[
, E
2
cos(
60
60
2
180
2
−
and E
XV
XV
)
−
−
+
π
60
20
60
)
φ
)
f
−
A
A
1 (
, and E
0
PHADJ
S
φ
−
T
φ
XI
−
XI
)
−
S
300
S
φ
)
φ
−
)
tan(
© 2005−2011 Teridian Semiconductor Corporation
tan(
)
2
S
−
1
S
1
−
to calculate φ
)
−
−
)
−
9
tan(
=
300
−
2
1
−
)
60
60
2
2 (
2
1
A
1
. Again, set all calibration factors to nominal, i.e. CAL_IA = 16384, CAL_VA =
1 (
−
φ
XV
=
)
)
+
−
sin(
sin(
S
2
A
2
1 )
2
A
1 (
[
XV
−
−
XI
20
9
φ
φ
−
−
)
S
cos(
S
S
PHADJ
A
.
2
cos(
1 (
)
)
XI
−
1
−
−
9
−
cos(
)
φ
1
1
2
2
cos(
S
π
−
)
9
f
φ
0
−
)
−
T
S
cos(
2
1
2
)
)
π
1 (
+
−
f
0
1
1 (
−
T
2
π
2
)
−
f
]
−
0
2
9
T
)
−
)
9
cos(
]
)



2
2
π
f
Energy Meter IC
0
T
))
DATA SHEET
71M6515H
JULY 2011
1.6