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A1123 - Chopper-Stabilized Precision Hall-Effect Switches

Download the A1123 datasheet PDF. This datasheet also covers the A1121 variant, as both devices belong to the same chopper-stabilized precision hall-effect switches family and are provided as variant models within a single manufacturer datasheet.

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Note: The manufacturer provides a single datasheet file (A1121_Allegro.pdf) that lists specifications for multiple related part numbers.

General Description

The A1120, A1121, A1122, A1123, and A1125 Hall-effect unipolar switches are extremely temperature-stable and stress-resistant sensor ICs, especially suited for operation over extended temperature ranges to 150°C.

Superior hightemperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress.

Each device includes on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-drain output to sink up to 25 mA.

Overview

A1120, A1121, A1122, A1123, and A1125 Chopper-Stabilized Precision Hall-Effect.

Key Features

  • AEC-Q100 automotive qualified.
  • Unipolar switch points.
  • Resistant to physical stress.
  • Superior temperature stability.
  • Output short-circuit protection.
  • Operation from unregulated supply.
  • Reverse-battery protection.
  • Solid-state reliability.
  • Small package sizes.

📁 Similar Datasheet

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More Datasheets from Allegro MicroSystems

Part Number Description
A1120 Chopper-Stabilized Precision Hall-Effect Switches
A1121 Chopper-Stabilized Precision Hall-Effect Switches
A1122 Chopper-Stabilized Precision Hall-Effect Switches
A1125 Chopper-Stabilized Precision Hall-Effect Switches
A1126 Chopper-Stabilized Omnipolar Hall-Effect Switch
A1128 Highly Programmable Hall-Effect Switch
A1130 Two-Wire Unipolar Vertical Hall-Effect Switches
A1131 Two-Wire Unipolar Vertical Hall-Effect Switches
A1132 Two-Wire Unipolar Vertical Hall-Effect Switches
A1141 Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches