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A1120ELHLT-T

A1120ELHLT-T

Allegro MicroSystems
Digital Switch Unipolar Switch Open Drain Hall Effect SOT-23W
Active39,186 in stock
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Overview

The A1120ELHLT-T is a chopper-stabilized, unipolar Hall-effect switch designed for stable operation over a wide temperature range of -40 to 85 degrees Celsius. This AEC-Q100 qualified sensor features an open-drain output and integrated protection circuitry, making it highly resilient in harsh automotive and industrial environments.

Why Choose This Part

This sensor offers superior temperature stability and resistance to physical stress through its chopper-stabilization technology. It includes robust protection features such as reverse-battery protection, output short-circuit protection, and the ability to operate from an unregulated 3V to 24V supply.

Applications

Automotive Gear Shifters
Detecting lever position in transmission systems with high reliability and vibration resistance.
Industrial Limit Switching
Providing non-contact position sensing for moving mechanical parts in automated assembly lines.
Seat Belt Buckle Sensors
Reliable presence detection for safety systems requiring AEC-Q100 qualified components.
Speed Sensing
Monitoring rotational speed by detecting passing magnets on a rotating shaft or wheel.

Key Specifications

Function Unipolar Switch
Technology Hall Effect
Output Type Open Drain
Polarization South Pole
Mounting Type Surface Mount
Sensing Range 5mT Trip, 0.5mT Release
Package / Case SOT-23W
Test Condition -40degC ~ 85degC
Voltage - Supply 3V ~ 24V
Operating Temperature -40degC ~ 85degC (TA)
Current - Output (Max) 25mA
Current - Supply (Max) 4mA
Supplier Device Package SOT-23W

Getting Started

To integrate this sensor, connect the VCC pin to a 3V-24V source and place a pull-up resistor (typically 1k to 10k ohms) on the open-drain output. Ensure a 0.1uF bypass capacitor is placed close to the device pins to filter power supply noise in automotive environments.

Also Consider

AH3362Q DIODiodes Incorporated - A high-sensitivity AEC-Q100 qualified unipolar switch with a wider 3V to 28V operating range.
TLE4906K IFXInfineon Technologies - An alternative high-precision Hall-effect switch designed specifically for automotive position sensing.