Quality Standards and Environmental Certifications

0 to 400 A Current Sensor ICs with Integrated Conductor

We drive innovation in the current sensor industry with a history of first-to-market products that give our customers a competitive edge. Did you know we invented the 100 µΩ CB package with high isolation for sensing up to 400 amps? It offers world-leading efficiency and power density.

Our high current sensor IC packages are fully integrated solutions that also provide high accuracy and reliability. These sensors are automotive-grade devices that can take the heat and deliver highly accurate open-loop current sensing in the harshest applications environments.

Current Sensor IC 0 to 400 A Selection Guide

Documentation & Resources

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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Design Tool

ACS LTSpice Library

The ACS LTSpice Model Library uses LTSpice SPICE simulation software to create simple, behavioral, and idealized models for Allegro current sensors. These models can be used for simulation purposes to help demonstrate Allegro current sensor behavior in individual customer applications.

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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

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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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

Hysteresis Offset Error In Hall-Effect Current Sensors Using Soft Ferromagnetic Concentrator Cores

AN296182 - When measuring busbar current with a surrounding soft ferromagnetic concentrator cores, Allegro recommends using a linear IC, such as the A1365, A1367, or ACS70310, in conjunction with a ferromagnetic core for high-current measurement (above 200 A).

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Application Note

Method for Evaluating Thermal Performance of Allegro Current Sensors in Application

AN296236 - This application note discusses the industry standard of using RΘJA to design for maximum junction temperature and why it does not apply to Allegro MicroSystems integrated conductor current sensors.

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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

Allegro Current Sensor ICs: Unique Packaging Options for Every Thermal Budget

AN296190 - The data contained within this application note allows the user to effectively choose an Allegro current sensor package based on their system’s specifications.

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Application Note

Explanation of Error Specifications for Allegro Linear Hall-Effect based Current Sensor ICs

AN296181 - Determining the accuracy of a system requires knowledge of the error introduced by each component. When looking at Allegro current sensor datasheets, the total error line item is a good approximation of the worst-case error seen in application.

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Application Note

Current Sensing for Power Delivery

AN296256 - This article will discuss the advantages of various current sensing methods in power delivery.

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Application Note

Techniques to Minimize Common-Mode Field Interference When Using Allegro Current Sensor ICs (ACS724 and ACS780)

This application note will discuss the mechanism of CMR and focus on how to best use this mechanism through optimized circuit board design and layout for sensors that need an external magnetic core, sensors that have a core built into the package, and sensors that have an integrated ...

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Application Note

Hysteresis Mitigation in Current Sensor ICs Using Ferromagnetic Cores

AN269114 - Traditional open-loop current sensor ICs, like the Allegro ACS758CB and ACS770CB families, have ferromagnetic cores that act as magnetic concentrators. They concentrate the magnetic flux density, the B field, generated by current flowing through a conductor onto the Hall-effect sensor ...

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Application Note

Increased Electric Motor Content in HEV Subsystems Require Current Sensing

To control the drive train in HEV and full EV vehicles, it is well-known that current sensing is required particularly in starter generator and main electric drive motor generator applications.

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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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