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Allegro Current Sensors

Allegro has been driving innovation in the current sensor industry for nearly 20 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. Our fully integrated solutions make design-in easy.

We're leading the market in main traction motor and auxiliary inverters for electric vehicles, and OEMs trust Allegro for applications like DC to DC converters and on-board chargers.

We also shine at high voltage with industry leading isolation ratings of up to 1100Vrms—ideal for residential and industrial solar inverter applications.

Features and Innovations

DC Working Voltage

Our packages have the highest working voltages in SOIC-16 footprint

Over-current Detection

Allegro’s current sensors include fast over-current detection in addition to a precision analog output.

High Speed sensors replace bulky current transformers

High speed integrated sensors are the smart alternative to bulky current transformers (CTs).

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Portfolios
Featured Products
Videos
Design Support Tools

Portfolios

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.

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0 to 400 A Integrated Current Sensor ICs

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.

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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.

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Featured Products

ACS730

The ACS730 current sensor family provides a 1 MHz bandwidth with lightning fast 210 ns response time sensing for AC or DC current sensing in automotive, industrial, commercial, and communications systems.

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ACS724-5

The Allegro ACS724/ACS725 family of current sensor ICs are economical and precise solutions for AC or DC current sensing in industrial, automotive, consumer, and communications systems

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ACS72981

The ACS72981 has a 250 kHz bandwidth analog output with a <2 µs response time, enabling overcurrent fault detection in safety-critical applications.

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Videos

Rejecting stray magnetic fields in Hall-effect-based current sensors using the ACS724

ACS712 Low-Noise 2100 VRMS Hall-Effect Current Sensor IC

ACS780 & ACS781: High Current Density Fully Integrated Current Sensor ICs

Design Support Tools

Coreless Current Sensor Busbar Calculator

Application Notes

Techniques for Migrating Interference While Measuring High Frequency, High Current Transient Responses

An Effective Method for Characterizing System Bandwidth in Complex Current Sensor Applications

DC Current Capability and Fuse Characteristics of Current Sensor ICs with 50 to 200 A Measurement Capability

Secrets of Measuring Currents Above 50 Amps

Related Resources

ACS37002 in MA/LA/MC Package next to Solar Panels

News

Allegro Releases World’s Most Accurate 400 kHz Current Sensor IC with 5 kV Isolation Rating

Jun 24, 2020

Allegro MicroSystems announced the launch of the ACS37002 advanced Hall-effect current sensors. Enabling more efficient power conversion in higher frequency switching applications, the ACS37002 has 400kHz sensing bandwidth up to 180 A with low offset and better than 1% typical total accuracy over ...

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News

Industry’s First Standalone Coreless Current Sensor

Mar 03, 2020

Allegro’s new ultra-compact TSSOP8 package delivers precise current measurements for applications >200A without a magnetic concentrator core or shield - reduces size, weight and total system cost for xEV applications.

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News

Allegro Launches Custom SOIC16W Package Ideal for Power Dense Hybrid and Electric Vehicles and Solar Applications

Feb 13, 2020

Allegro MicroSystems has announced the release of the brand-new custom SOIC16W package, named “MC”, which marks a leap forward in the industry’s current sensing capabilities for power dense applications that require high isolation with low power loss.

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Semiconductors (general)

Allegro Product Selection Guide

Sense. Regulate. Drive. Check out our device offerings and packages across all of our product families in this PDF selection guide.

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