TLE4990

Programmable Linear Hall Sensor

Signal Processing

Data Sheet

13

V 2.0, 2004-05

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

Therefore the product of sensitivity and full scale range is always 4.7 V.

Sensitivity x Full Scale range = 4.7 V[1]

I

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

Table 6

Range Setting

Range

PRE bits

Sensitivity (mV/mT)

Typical Values

Magnetic Full Scale

Range (mT)

PRE2

PRE1

max.

min.

max.

0

0

0

0

11.49

16.49

285

409

1

0

0

1

16.17

23.20

203

291

2

0

1

0

22.75

32.65

144

207

3

0

1

1

32.00

45.96

102

147

4

1

0

0

45.04

64.63

72.7

104

5

1

0

1

63.38

90.92

51.7

74.2

6

1

1

0

89.16

127.9

36.8

52.7

7

1

1

1

125.5

180.0

26.1

37.5

PRE (Preamplifier)

2

1

0

PRE2 ... PRE0