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. 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 us 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 1100 Vrms—ideal for residential and industrial solar inverter applications.
Our packages have the highest working voltages in SOIC-16 footprint
Our current sensors include fast overcurrent detection in addition to a precision analog output.
High speed integrated sensors are the smart alternative to bulky current transformers (CTs).
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.
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.
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.
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.Learn More
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.Learn More
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.Learn More
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 familyLearn More
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.Learn More
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.Learn More
June 01, 2021
The ACS3761X Hall-effect sensor IC solution family is a coreless and shield-free solution, reducing BOM and overall inverter size and weight. These differential sensors reject stray magnetic fields, reducing reliance on software. The family is optimized for a large range of currents, 100 A to >4000 ...Learn More
August 24, 2020
Watch video explaining and demonstrating a method for rejecting stray magnetic fields in Hall-effect-based current sensors using the ACS724. This technology solves interference and cross-talk issues, greatly simplifying the use of magnetic current sensors in magnetically noisy environments, such as ...Learn More
January 23, 2020
The Allegro ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, ...Learn More
AN296117 - This applications note, while not designed to be a comprehensive analysis of voltage isolation standards, introduces various Allegro current sensor integrated circuit (IC) packages that can be used to achieve high isolation ratings that meet industry standards.Learn More