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Hall-Effect Linear Current Sensor IC with Overcurrent Fault

ACS711

The ACS711 offers a cost-effective solution for current sensing in low- and high-side applications, with integrated overcurrent fault protection and a low-noise analog signal path. Eliminates the need for an external sense resistor, reducing component count and PCB space.

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Documentation and Resources

Top Features

Typical Applications

Packaging

No external sense resistor required; single package solution
Reduced Power Loss:
- 0.6 mΩ internal conductor resistance on EX package
- 1.2 mΩ internal conductor resistance on LC package
Economical low- and high-side current sensing
Output voltage proportional to AC or DC currents
±12.5 A and ±25 A full scale sensing ranges on LC package
±15.5 A and ±31 A full scale sensing ranges on EX package
Overcurrent FAULT trips and latches at 100% of full-scale current
Low-noise analog signal path
100 kHz bandwidth
Small footprint, low-profile SOIC8 and QFN packages
3.0 to 5.5 V, single supply operation
Integrated electrostatic shield for output stability
Factory-trimmed for accuracy
Extremely stable output offset voltage
Zero magnetic hysteresis
Ratiometric output from supply voltage

Load Management in Solar Inverters
Battery and Charging in Personal Mobility
Short Circuit and Overpower Detection in Audio
Motor and Pump Control in White Goods
General Power Supply Monitoring

The ACS711 is provided in small, surface mount packages: SOIC8 and QFN12. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS.

LC Package Documentation

EX Package Documentation

Part Number Specifications and Availability

ACS711 Product Overview

The Allegro ACS711 provides economical and precise solutions for AC or DC current sensing in 100+ V audio, communications systems, clean energy, personal mobility and white goods. The device package allows for easy implementation by the customer.

The device consists of a linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage.

Discover Allegro's Advanced Magnetic Current Sensors!

Upgrade your designs with efficient, compact, and integrated solutions. Simplify your circuits and reduce component count with Allegro's innovative sensor technology.

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Documentation and Resources

Documentation

Design Tools

Third Party Design Tools

Filter Document Type:

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All Types Application Note Blog Brochure FAQ Technical Article

Documents Found: 32

Document Type	Document Name
Application Note	May 02, 2022 New Approaches to High-Efficiency Current Sensing: Integrated Hall Sensor ICs Save Power and Space
Application Note	Managing External Magnetic Field Interference When Using ACS71x Current Sensor ICs
Application Note	Current Sensing in Motor Drives
Application Note	A Micro-Packaged Linear Current Sensor IC
Application Note	Package Thermal Resistance for Allegro Current Sensors with Integrated Conductors
Application Note	Glossary of Isolation-Related Terms for Integrated Current Sensors
Blog	January 07, 2025 Magnetic Sensors are a Great Alternative to Traditional Shunt Resistors for Industrial Current Sensing
Brochure	Brochure: Driving Change by Advancing Personal Mobility Through Cutting-Edge Technology
FAQ	Current Sensors FAQ
Technical Article	Overcoming Complexity Challenges in PCB Design with Magnetic Current Sensors
Technical Article	Next-Generation Current Measurement: Addressing PCB Design Challenges with Magnetic Current Sensors
Technical Article	Crank Sensor IC for Stop-Start

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All Types Gerber File Simulation Tool User Guide Webpage

Documents Found: 32

Document Type	Document Name
Gerber File	ASEK711EX Gerber Files
Gerber File	ASEK711LC Gerber Files
Simulation Tool	Current Sensor Error and Resolution
User Guide	ASEK711 Demo Board Tutorial
Webpage	Current Sensor Evaluation Boards and User Guides

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All Types Hardware Kit or Board

Documents Found: 32

Document Type	Document Name
Hardware Kit or Board	Pololu ACS711KEXLT-15AB-T Current Sensor Carrier
Hardware Kit or Board	Mikroe Hall Current 2 Click Carrier Board