TLE4997E2 datasheet(10/35 Pages) INFINEON

10 / 35 page

TLE4997

General

Data Sheet

V 2.08, 2008-09

2.3

Principle of Operation

• 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 to D conversion provide very low

and stable magnetic offset.

• A programmable Low-Pass filter reduces the noise.

• The temperature is measured and A to D converted.

• Temperature compensation is processed digitally using a second order function.

• Digital processing of output voltage is based on zero field and sensitivity value.

• The output voltage range can be clamped by digital limiters.

• The final output value is D to A converted.

• The output voltage is proportional to the supply voltage (ratiometric DAC).

• An On-Board-Diagnostics (OBD) circuit connects the output to

VDD

or GND in case of errors.

2.4

Further Notes

Product qualification is based on “AEC Q100 Rev. G” (Automotive Electronics Council -

Stress test qualification for integrated circuits).

_TLE4997x_Data_Sheet.book Page 10 Wednesday, October 1, 2008 5:08 PM

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