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A1148 Datasheet (a1147 / A1148) Low Current Ultrasensitive Two-wire Chopper-stabilized Unipolar Hall Effect Switches

Manufacturer: Allegro MicroSystems

Overview: A1147 and A1148 Low Current Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

The A1147 and A1148 devices are two-wire, unipolar, Hall effect switches that are factory-programmed at end-of-line to optimize ultrasensitive magnetic switchpoint accuracy.

These devices use a patented high frequency chopper-stabilization technique, produced using the Allegro advanced BiCMOS wafer fabrication process, to achieve magnetic stability and to eliminate offset inherent in single-element devices exposed to harsh application environments.

Commonly found in a number of automotive applications, these switches are utilized to sense seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position.

Key Features

  • Chopper stabilization ▫ Low switchpoint drift over operating temperature range ▫ Low sensitivity to stress.
  • Factory programmed at end-of-line for optimized switchpoints.
  • On-chip protection ▫ Supply transient protection ▫ Reverse-battery protection ▫ On-board voltage regulator ▫ 3.5 to 24 V operation.

A1148 Distributor

More Datasheets from Allegro MicroSystems

Part Number Description
A1140 Sensitive Two-Wire Chopper-Stabilized Unipolar Hall-Effect Switches
A1145 Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches
A1146 Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches
A1147 (A1147 / A1148) Low Current Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches
A1101 Continuous-Time Switch
A1102 Continuous-Time Switch
A1103 Continuous-Time Switch
A1104 Continuous-Time Switch
A1106 Continuous-Time Switch
A1150 Two Wire Hall-Effect Switches