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Hall effect switch


Part NumberA1104
ApplicationIndustrial, Sensing & Instrumentation, Medical
Magnetic TypeBipolar
Output Current25 mA
Operating Supply Voltage4.5 to 24 V
Pin Count3 Pin
Operating Temperature-40 to +85 deg C


Product Details:

Operating voltageFrom 3.8 to 24 V
TypeHall Effect Sensor




The Allegro A1101-A1104 and A1106 Hall-effect switches are next-generation replacements for the popular Allegro 312x and 314x lines of unipolar switches. The A110x family, produced with BiCMOS technology, consists of devices that feature fast power-on time and low-noise operation. Device programming is performed after packaging, to ensure increased switch point accuracy by eliminating offsets that can be induced by package stress. Unique Hall element geometries and low-offset amplifiers help to minimize noise and to reduce the residual offset voltage normally caused by device overmolding, temperature excursions, and thermal stress.

The A1101-A1104 and A1106 Hall-effect switches include the following on a single silicon chip: voltage regulator, Hall-voltage generator, small-signal amplifier, Schmitt trigger, and NMOS output transistor. The integrated voltage regulator permits operation from 3.8 to 24 V. The extensive on-board protection circuitry makes possible a ±30 V absolute maximum voltage rating for superior protection in automotive and industrial motor commutation applications, without adding external components. All devices in the family are identical except for magnetic switching levels.

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