tle4944 Infineon Technologies Corporation, tle4944 Datasheet - Page 3

• Manufacturer Part Number: tle4944
• Description: Hall-effect Ic; Psi Protected-precision-siemens-hall-ic Highly Accurate, Protected Hall-effect
• Manufacturer: Infineon Technologies Corporation

TLE 4904; TLE 4934;
TLE 4944
Circuit Description
The circuit includes Hall generator, amplifier and comperator with hysteresis on one chip.
The internal reference provides the supply voltage for the components. A magnetic field
perpendicular to the chip surface induces a voltage at the hall probe. This voltage is amplified and
switches a comparator with open-drain output.
The switching points are adjusted to achieve high accuracy. The active offset compensation
eliminates internal and external offsets (mechanical stress) by switching of the hall element. The
built-in temperature compensation fits to regular magnet system.
Protection is provided at the input/supply (pin 1) for overvoltage and reverse polarity, against
overstress such as load dump, etc., in accordance with ISO-TR 7637 (DIN 40839). The output
(pin 3) is protected against voltage peaks and short circuit.
Figure 1
Block Diagram