TLE4990 Datasheet, PDF (13/24 Pages) Infineon Technologies AG – Programmable Linear Output Hall Sensor

TLE4990
Programmable Linear Hall Sensor
Signal Processing
6
Signal Processing
6.1
Magnetic Field Ranges (fixed in -E6782 version)
The output signal of the Hall cell is amplified in the pre-amplifier.
Eight ranges can be selected by setting the PRE bits.
The output voltage range of 3 ... 97% of V_DD leads to a swing of 4.7 V at V_DD = 5 V.
Therefore the product of sensitivity and full scale range is always 4.7 V.
Sensitivity x Full Scale range = 4.7 V
[1]
I
Table 6
Range Setting
Range
PRE bits
Sensitivity (mV/mT)
Typical Values
PRE2 PRE1 PRE0 min.
max.
0
0
0
0 11.49
16.49
1
0
0
1 16.17
23.20
2
0
1
0 22.75
32.65
3
0
1
1 32.00
45.96
4
1
0
0 45.04
64.63
5
1
0
1 63.38
90.92
6
1
1
0 89.16
127.9
7
1
1
1 125.5
180.0
Magnetic Full Scale
Range (mT)
min.
max.
285
409
203
291
144
207
102
147
72.7
104
51.7
74.2
36.8
52.7
26.1
37.5
In the bipolar mode, the full scale range is composed of a postive and a negative part
with the half value each. (e.g. ±142.4 mT ... ±204.4 mT in range 0).
Note: The range should be set before the calibration of the gain.
Range register
PRE (Preamplifier)
2
1
0
PRE2 ... PRE0
Data Sheet
13
V 2.0, 2004-05