4201R4 データシートの表示（PDF） - Infineon Technologies

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4201R4

Differential Two-Wire Hall Effect Sensor IC

Infineon Technologies 

TLE4942-1

TLE4942-1C

Functional Description

The differential Hall Effect IC detects the motion of ferromagnetic or permanent magnet

structures by measuring the differential flux density of the magnetic field. To detect the

motion of ferromagnetic objects the magnetic field must be provided by a backbiasing

permanent magnet. Either the South or North pole of the magnet can be attached to the

rear, unmarked side of the IC package.

Magnetic offsets of up to ± 20 mT and mechanical offsets are cancelled out through a

self-calibration algorithm. Only a few transitions are necessary for the self-calibration

procedure. After the initial self-calibration sequence switching occurs when the input

signal crosses the arithmetic mean of its max. and min. values (e.g. zero-crossing for

sinusoidal signals).

The ON and OFF state of the IC are indicated by High and Low current consumption.

Each zero crossing of the magnetic input signal triggers an output pulse.

Magnetic Signal

Pulse

Length

Output Signal

AED03189

Figure 3 Zero-Crossing Principle and Corresponding Output Pulses

Data Sheet

5

V 3. 1, 2005-02

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