Manual
CS5490
50 DS982F3
6.6.49 Gain for Voltage (V
GAIN
) – Page 16, Address 35
Default = 1.0
Gain register V
GAIN
is initialized to 1.0 on reset. During gain calibration, the V
GAIN
register is written with the
multiplicative inverse of the gain measured. This is an unsigned fixed-point value in the range of
0 value 4.0, with the binary point to the right of the second MSB.
6.6.50 Average Active Power Offset (P
OFF
) – Page 16, Address 36
Default = 0
Average Active Power Offset (P
OFF
) is added to the averaged active power to yield P
AVG
register results. It
can be used to reduce systematic energy errors. This is a two's complement value in the range of
-1.0 value 1.0, with the binary point to the right of the MSB.
6.6.51 Average Reactive Power Offset (Q
OFF
) – Page 16, Address 38
Default = 0x00 0000
Average Reactive Power Offset (Q
OFF
) is added to the averaged active power to yield Q
AVG
register results.
It can be used to reduce systematic energy errors. It is a two's complement value in the range of
-1.0 value 1.0, with the binary point to the right of the MSB.
6.6.52 AC Offset for Current (I
ACOFF
) – Page 16, Address 37
Default = 0
AC offset register I
ACOFF
is initialized to zero on reset. It is used to reduce systematic errors in the RMS re-
sults. This is an unsigned value in the range of 0 value 1.0, with the binary point to the left of the MSB.
6.6.53 Temperature Gain (T
GAIN
) – Page 16, Address 54
Default = 0x 06 B716
Register T
GAIN
is used to scale the Temperature register (T), and is an unsigned fixed-point value in the range
of 0.0value256.0, with the binary point to the right of bit 16.
Register T can be rescaled by the application using the T
GAIN
and T
OFF
registers. Refer to section 7.3 Tem-
perature Sensor Calibration on page 54 for more information.
MSB LSB
2
1
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
.....
2
-16
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
MSB LSB
-(2
0
)2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
.....
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23
MSB LSB
-(2
0
)2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
.....
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23
MSB LSB
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
.....
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23
2
-24
MSB LSB
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
.....
2
-10
2
-11
2
-12
2
-13
2
-14
2
-15
2
-16