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TLE4998C8D Datasheet, PDF (11/28 Pages) Infineon Technologies AG – High Performance Programmable Dual Linear Hall Sensor | |||
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TLE4998C8D Grade1
2.3
Principle of Operation
General
⢠A magnetic flux is measured by a Hall-effect cell
⢠The output signal from the Hall-effect cell is converted from analog to digital signals
⢠The chopped Hall-effect cell and continuous-time A/D conversion ensure a very low and stable magnetic offset
⢠A programmable low-pass filter to reduce noise
⢠The temperature is measured and A/D converted
⢠Temperature compensation is done digitally using a second-order function
⢠Digital processing of the output value is based on zero field and sensitivity value
⢠The output value range can be clamped by digital limiters
⢠The final output value is represented by the data nibbles of the SPC protocol
2.4
Further Notes
Product qualification is based on âAEC Q100 Rev. Gâ (Automotive Electronics Council - Stress test qualification
for integrated circuits).
2.5
Transfer Functions
The examples in Figure 2-2 show how different magnetic field ranges can be mapped to the desired output value
ranges.
⢠Polarity Mode:
â Bipolar: Magnetic fields can be measured in both orientations. The limit points do not necessarily have to
be symmetrical around the zero field point
â Unipolar: Only north- or south-oriented magnetic fields are measured
⢠Inversion: Both gain can be set to positive values, negative values or positive/negative values.
B (mT)
50
OUT12 /
OUT16
B (mT)
4095 /
65535
100
OUT12 /
OUT16
B (mT)
4095 /
65535
200
OUT12 /
OUT16
4095 /
65535
0
0
0
0
0
0
-50
-100
Figure 2-2
Example 1:
- Bipolar
Examples of Operation
Example 2:
- Unipolar
- Big offset
Technical Product Description
11
-200
Example 3:
- Bipolar
- Inverted (neg. gain)
Revision 1.0, 2014-05-21
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