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Field Sensors 0 to >1000 A Sensor ICs

We shine at high voltage. This product family offers industry-leading accuracy and safety, as well as a history of high reliability.

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.

Have a question? Refer to our Current Sensors FAQ page for more information. 

See below for our offerings of Hall-effect based linear current sensor ICs:

Documentation & Resources

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.

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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.

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Application Note

Increasing System Safety using the A1365 Programmable Linear Hall-Effect Sensor IC with Self-Test Diagnostic Mode

As safety goals multiply throughout the system design process, customers demand smart sensors that can be used to diagnose abnormalities in a system. The built-in Self-Test mode of the A1365 grants users such insight into their systems.

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FAQ

Current Sensors FAQ

Have questions about our industry-leading current sensor ICs? Check out our most frequently asked questions and answers.

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Application Note

Achieving Closed-Loop Accuracy in Open-Loop Current Sensors

Closed-loop current sensing technology is employed in many industrial and automotive applications for accurate current sensing. Allegro MicroSystems has developed magnetic-based current sensor IC solutions that achieve near closed-loop accuracy using an open-loop topology.

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Application Note

Transient Current Behavior in Applications using the Allegro Coreless ACS37610 Differential Current Sensor

AN296258 - This application note explains how the conductor design can impact the response time of the current measurement for coreless current sensing applications and provides examples of response time to transient current for two types of conductors.

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Application Note

Improved Performance and Features of Allegro’s Next Generation, High Power Density CB Package Current Sensors

This application note will describe the use of the new high current ACS772 Hall-effect current sensor integrated circuit (IC) from Allegro MicroSystems and will give an overview of its features and improvements from previous Allegro high-current sensors.

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Brochure

Brochure: Innovative Current Sensor ICs

Allegro MicroSystems has been driving innovation in the current sensor industry for more than 17 years, 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.

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Application Note

Guidelines for Designing a Busbar with Notch for Allegro's ACS37612 Differential Coreless Current Sensor

AN296188 - This application note offers guidelines for achieving optimum busbar and notch designs using the Allegro ACS37612 coreless current sensor

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Application Note

Mitigating Interference while Measuring High Frequency, High Current Transient Responses

AN296155 - This application note will demonstrate techniques on how to avoid coupling the field from high-current transients onto the signal and power lines of current sensors in order to avoid a perceived distortion of the output.

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Application Note

Material Selection and Geometry Considerations for High Current Sensing Magnetic Flux Concentrator Designs

AN296245 - Core material selection, geometry, and air gap dimensions will all impact the performance of the flux concentrator. This note will explain each of these factors and provide a detailed guide for design of a magnetic flux concentrator.

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Brochure

Brochure: Solar Energy Harvesting

Allegro’s current sensor ICs are ideal for use with solar applications, which include electronic subsystems like solar combiner boxes, DC/DC converters for maximum power point tracking (MPPT), and DC-AC inverters.

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Application Note

ACS37600 Reference PCB Design for Current Sensing Module Applications

AN296205 - The aim of this document is to provide guidelines for designing a PCB for the ACS37600 while minimizing possible undershoots/overshoots due to a fast current step response.

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Brochure

Brochure: Current Sensing for Vehicle Electrification

Charge into the future of vehicle electrification with the world's #1 supplier of current sensor ICs for leading EV applications.

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Application Note

Understanding Linearity Error for the ACS70310 Above 2000 G

AN296206 - The goal of this application note is to illustrate and discuss the linearity error of the ACS70310 when sensing fields greater than 2000 G.

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