The A1244LUA-I1-T is a high-precision isolated Hall-effect current sensor from Allegro MicroSystems, designed for accurate AC/DC current measurement in power electronics and industrial applications. This device features a measurement range of ±60 A (with a 120 A peak capability) and provides a proportional analog output voltage for real-time current monitoring. It integrates a copper conduction path and a Hall sensor within a compact SOIC-8 package, enabling direct current sensing without requiring a shunt resistor or external excitation. The sensor operates from a single 5 V supply and features integrated diagnostics for fault detection, making it suitable for safety-critical systems.

Key Features

The A1244LUA-I1-T offers a high accuracy of ±1.5% across the full temperature range (-40°C to +125°C) and a bandwidth of 50 kHz for capturing fast-changing currents. Its isolation rating of 2500 Vrms ensures safe operation in high-voltage environments. The device provides a linear output voltage proportional to the sensed current (20 mV/A), simplifying signal conditioning. Built-in overcurrent indication and short-circuit protection enhance reliability, while its low thermal drift maintains performance in harsh conditions. The integrated copper conductor path minimizes power loss and simplifies PCB layout.

Applications

Primarily used in motor drives, power supplies, and renewable energy systems, the A1244LUA-I1-T is critical for current monitoring in inverters, UPS systems, and EV/HEV battery management. It is widely employed in industrial automation, solar inverters, and server power supplies where precise, isolated current feedback is required. Its compact size and robust design make it suitable for space-constrained applications like IoT edge devices and smart grid infrastructure.

Summary

The A1244LUA-I1-T combines high accuracy, wide current range, and robust isolation, making it a premier choice for precise current sensing in power electronics and industrial systems. Its compact form factor, integrated diagnostics, and wide operating temperature range cater to applications demanding reliable performance in high-voltage and harsh environments. This sensor is indispensable for engineers designing energy-efficient systems that require safe, real-time current monitoring without compromising accuracy or safety.