TLE4990

Programmable Linear Hall Sensor

Functional Description

Data Sheet

9

V 2.4, 2005-11

Transfer Functions

The examples in Figure 3 show how different magnetic field ranges can be mapped to

the output voltage.

•

Polarity mode:

– Unipolar: only magnetic fields in one direction are measured.

The zero field voltage is near to the GND level.

– Bipolar: Magnetic fields can be measured in both orientations.

The zero field voltage is about the half voltage.

Figure 3

Examples of Operation

Figure 4

Magnetic Field Direction Definition

Example 1: Bipolar,

Example 2: Unipolar

setting used in -E6782 version

TLE4990_MAGNETIC_RANGE

0

5

125

-125

5

50

-50

V

V

OUT

0

B (mT)

V

B (mT)

2.5

0

0

TLE

4990

B

B

Increase of Magnetic Field

Increase of Output Voltage

Increase of Magnetic Field

Decrease of Output Voltage

TLE

4990