TLI4970-D025T5_15 Datasheet, PDF (11/29 Pages) Infineon Technologies AG – Miniature coreless magnetic current sensor for AC

TLI4970-D025T5
2.4
Transfer Function
The transfer function is given by the formula shown in Figure 2-3.
Functional Description
I_out
[
A]
=
out[LSB_D ]−
160[
4096[LSB_D
] ^LSBD
A
]
out[
LSB_D
]
=
I
[
A]
⋅160[
LSB_D
A
]
+
4096[
LSB_D
]
Figure 2-3 Transfer function formula
The basic point are defined by the value 0_D (-25.6000A) and 8191_D (25.59375A). Outside this current range, the
sensor status message will be sent instead of the sensor current message (see Figure 2-4).
8191
1 1111 1111 1111
7168
1 1100 0000 0000
6144
1 1000 0000 0000
5120
1 0100 0000 0000
4096
1 0000 0000 0000
3072
0 1100 0000 0000
2048
0 1000 0000 0000
1024
0 0100 0000 0000
0
0 0000 0000 0000
-25 -20 -15 -10 -5 0 5 10 15 20 25
Current [A]
Sensor current message
Sensor status message
Figure 2-4 Transfer function
Data Sheet
11
Rev. 1.0, 2015-07-02