Current Sensors
Achieve high performance with high accuracy , fault detection , operation at high voltage current sensors.
We've been driving innovation in the current sensor industry since 2002, with a history of first-to-market products that give our customers a competitive edge. Our advanced ICs help you achieve higher efficiency and power density in your designs
Browse by category
0 to 50 A Integrated Current Sensor ICs
Our family of fully integrated, high isolation current sensor solutions provides accurate measurement with very low resistance—all without the need for external isolation components.
0 to 400 A Integrated Current Sensor ICs
Our fully-integrated, high current sensor IC packages provide high accuracy and reliability. Our automotive-grade devices that can take the heat and deliver highly accurate open-loop current sensing in the harshest applications environments.
Field Sensors 0 to >1000 A Sensor ICs
Customer-programmable for both offset and sensitivity, these Hall linear ICs are packaged in a 1 mm thick KT package SIP that is often used in applications with a ferromagnetic core and are designed to sense currents above 1500 A.
Featured Products
ACS37220
The ACS37220 is a high-power-density 200A, 150kHz magnetic current sensor for applications requiring an isolation voltage below 100V.
CT455
The CT455 is a high bandwidth and low noise integrated contactless current sensor that enables high accuracy current measurements.
ACS37610
The ACS37610 is a truly coreless, high precision, Hall-Effect current sensor with common-mode field rejection and high bandwidth ideal for electric vehicle (EV) applications.
ACS37041 and ACS37042
ACS37041 and ACS37042 are fully integrated Hall-effect-based current sensor ICs that provide a galvanically isolated voltage output proportional to the sensed current.
Documentation & Resources
Blog
Magnetic Sensors are a Great Alternative to Traditional Shunt Resistors for Industrial Current Sensing
Magnetic sensors have entered the market, bringing a whole new level of performance, safety, and reliability to the table, much like what Allegro is doing with our current sensor portfolio. So, what makes them so special? Let's discuss.
Brochure
Brochure: Lift Designs to the Next Level
Drive mobile robots with unmatched precision and control.
Technical Article
Rethink PCB Current Sensing
This article will discuss two new innovative approaches to measure currents up to 600 A in PCB: a near-lossless Hall-based current sensor with an integrated conductor and a non-invasive standalone core-free and shield-free differential Hall current sensor.
Technical Article
Solving EV Charging with High-Performance Gate Drivers and Current Sensors
Before EVs can reach true widespread adoption, one of the biggest obstacles is the accessibility, reliability and performance of EV chargers.
Technical Article
Solar Energy Systems – New Market Trends in Current Sensing
P0103 - As solar installations grow larger and more ambitious by the day, new trends in current sensing are emerging for this expanding energy market.
Technical Article
New 400 kHz Current Sensors Enable More Sustainable Designs in Switch-Mode Power Designs
Really Cool. Really Efficient. New 400 kHz current sensors enable more sustainable designs in switch-mode power designs.
Application Note
CMTI Comparison for Allegro Integrated Conductor Current Sensors
Common-mode transient immunity (CMTI) test injects transient voltages with high slew rates across the isolation barrier of the current sensor. During the transient event, the output stability of the device is observed.
Video
XtremeSense™ TMR Technology
Allegro MicroSystems empowers engineers to deliver top-tier solutions with XtremeSense™ TMR technology, enabling industry-leading precision and cost efficiency in current and position sensors.
Whitepaper
Next Generation Performance with XtremeSense™ TMR Technology
Introducing Allegro MicroSystems’ XtremeSenseTM TMR Technology
Application Note
ACS37030/2 High Bandwidth 5 MHz Current Sensor Enables High-Speed Control and Protection in Power Converter Applications
The ACS37030/2 is the first integrated 5 MHz bandwidth current sensor, which enables these systems to extract more benefit from faster and lowerloss switches.
Application Note
An Effective Method for Characterizing System Bandwidth in Complex Current Sensor Applications
This application note describes multiple methods for measuring
and characterizing system bandwidth, with a focus on
the impulse response method. Allegro’s ACS720 is the perfect device to validate the test methods outlined here.
Application Note
High-Current Measurement with Allegro Current Sensor IC and Ferromagnetic Core: Impact of Eddy Currents
AN296162 - The technique of measuring bus bar current with a surrounding ferromagnetic core is common knowledge. For highcurrent measurement above 200 A, Allegro recommends using a linear IC of the A136x family
Technical Article
Allegro is Driving the Future with Reliable eMobility Solutions
Techmezine speaks with Andreas P. Friedrich on Allegro’s Battery Management Solutions and latest innovation for EV.
Brochure
Brochure: Driving Change by Advancing Personal Mobility Through Cutting-Edge Technology
Our advanced sensor and power IC solutions are engineered specifically to meet the unique requirements of these designs, providing superior performance and reliability in harsh environments and under complex operating conditions.
Application Note
How to Analyze and Compare Allegro Current Sensor and ADC Error Components
AN296282: Allegro offers a wide variety of current sensors with analog voltage outputs, and in many applications, an analog-to-digital converter (ADC) converts the output voltage to a binary code.