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A1309LLHLX-9-T

A1309LLHLX-9-T

Allegro MicroSystems
Hall Effect Sensor Axis SOT-23W
Active48,145 in stock

Overview

The A1309LLHLX-9-T is a linear Hall-effect sensor IC designed for high-accuracy applications requiring an analog voltage output proportional to magnetic flux density. It operates on a 5V supply and features a high-speed chopping scheme that minimizes quiescent voltage output drift across its wide -40 to 150 degree Celsius temperature range.

Why Choose This Part

This sensor offers enhanced EMC performance for automotive environments and includes output voltage clamps for short-circuit diagnostic capabilities. The QVO temperature coefficient is factory-programmed at Allegro to ensure high stability and precise recoverability after thermal cycling.

Applications

Throttle Position Sensing
Provides precise, non-contact feedback for automotive electronic throttle control systems.
Current Sensing
Used with a magnetic core to measure high-current lines in power electronics and EV battery systems.
Liquid Level Sensing
Detects the position of a float-mounted magnet in automotive fuel tanks or industrial chemical reservoirs.
Pneumatic Cylinder Position
Monitors the stroke position of pistons in automated industrial machinery.

Key Specifications

Technology Hall Effect
Output Type Analog Voltage
Mounting Type Surface Mount
Package / Case SOT-23W
Voltage - Supply 4.5V ~ 5V
Operating Temperature -40degC ~ 150degC
Current - Output (Max) 2mA
Current - Supply (Max) 9mA
Supplier Device Package SOT-23W

Getting Started

To evaluate this part, connect VCC to a stable 5V supply and ground the GND pin while monitoring the VOUT pin with an oscilloscope or MCU ADC. Ensure a 0.1uF bypass capacitor is placed close to the VCC and GND pins to minimize noise on the sensitive analog output.

Also Consider

DRV5055 TITexas Instruments - Offers a ratiometric linear Hall effect solution with a wider 3.3V to 5V supply range.
A1324 Allegro MicroSystems - A similar linear Hall sensor optimized for different sensitivity levels in the same SOT-23W package.
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