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ACS711KLCTR-25AB-T

ACS711KLCTR-25AB-T

Allegro MicroSystems
Current Sensor 25A 1 Channel Hall Effect, Open Loop Bidirectional 8-SOIC (0.154", 3.90mm Width)
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Overview

The ACS711KLCTR-25AB-T is a compact, Hall-effect based linear current sensor designed for AC or DC current sensing in low-voltage systems. It provides a ratiometric analog voltage output proportional to the current flowing through the integrated copper conduction path, supporting up to 25A of bidirectional current. The device features an overcurrent fault output and is optimized for space-constrained applications using an 8-pin SOIC package.

Why Choose This Part

This sensor eliminates the need for an external shunt resistor, reducing PCB footprint and thermal management requirements. It features a fast 4.6us response time and 100kHz bandwidth, making it suitable for high-speed switching applications. The integrated electrostatic shield ensures high immunity to stray magnetic fields and voltage transients.

Applications

Motor Phase Current Monitoring
Ideal for measuring phase currents in low-voltage brushless DC or stepper motors to implement closed-loop control.
Battery Management Systems
Provides accurate charge and discharge current monitoring for 3.3V or 5V battery-powered electronics.
Solar Inverter Monitoring
Tracks DC output from solar panels or AC output in micro-inverters within the 25A range.
Overcurrent Protection
Utilizes the dedicated FAULT pin to trigger hardware interrupts during short-circuit or stall conditions.

Key Specifications

Output Ratiometric, Voltage
Accuracy +/-5%
Frequency DC ~ 100kHz
Linearity +/-1%
Sensitivity 55mV/A
Sensor Type Hall Effect, Open Loop
Polarization Bidirectional
For Measuring AC/DC
Mounting Type Surface Mount
Response Time 4.6us
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 3V ~ 5.5V
Current - Sensing 25A
Number of Channels 1
Operating Temperature -40degC ~ 125degC
Current - Supply (Max) 5.5mA
Supplier Device Package 8-SOIC

Getting Started

Connect the current path to pins 1/2 and 3/4, then interface the analog VOUT pin to a microcontroller ADC. Use the FAULT output to drive an interrupt pin for immediate overcurrent response. Ensure the VCC supply is decoupled with a 0.1uF capacitor to maintain the 55mV/A sensitivity accuracy.

Also Consider

ACS724LLCTR-30AB-T Allegro MicroSystems - Higher precision and enhanced isolation for 30A applications requiring better thermal performance.
ACS712ELCTR-20A-T Allegro MicroSystems - Legacy 5V-only version suitable for older designs that do not require 3.3V compatibility.

Categories

Sensors > Current & Voltage Sensors