Allegro MicroSystems Expands Current Sensing Leadership with Industry’s Highest Accuracy Magnetic Current Sensor

Rhea-AI Summary

Allegro MicroSystems (Nasdaq: ALGM) introduced the ACS37017, a factory-calibrated Hall-effect current sensor claiming an industry-leading 0.55% typical sensitivity error over lifetime and temperature. The device integrates a precision voltage reference, reinforced high-voltage isolation, and a compact monolithic SMD package.

The ACS37017 completes Allegro’s current-sensor lineup alongside the high-bandwidth ACS37100 and high-density ACS37200, targeting AI data centers, xEVs, and clean-energy power converters. Engineers can request a preliminary datasheet and engineering samples at the company website.

Positive

• Typical sensitivity error of 0.55% over lifetime and temperature
• Integrated precision voltage reference reduces BOM and system noise
• Reinforced high-voltage isolation suitable for xEV and industrial systems
• Completes portfolio with ACS37100 (speed) and ACS37200 (power density)
• Compact monolithic SMD package saves board space versus modules

Negative

• None.

News Market Reaction

-0.90%

1 alert

-0.90% News Effect

On the day this news was published, ALGM declined 0.90%, reflecting a mild negative market reaction.

Data tracked by StockTitan Argus on the day of publication.

Key Figures

Sensitivity error: 0.55% Bandwidth: 10 MHz Conductor resistance: 50 µΩ +5 more

8 metrics

Sensitivity error 0.55% Typical sensitivity error over lifetime and temperature for ACS37017

Bandwidth 10 MHz ACS37100 current sensor bandwidth using XtremeSense TMR technology

Conductor resistance 50 µΩ ACS37200 conductor value enabling high power density

Power loss reduction 90% Power loss reduction for ACS37200 versus competing solutions

Footprint reduction 95% Footprint shrink for ACS37200 in space-constrained applications

Capacitance reduction 15x Common-mode capacitance reduction in expanded Power-Thru portfolio

EMI improvement 20 dB EMI improvement for Power-Thru gate driver solutions

Share price $41.99 ALGM price before market reaction to ACS37017 launch

Market Reality Check

Price: $42.38 Vol: Volume 2,629,194 is at 0....

normal vol

$42.38 Last Close

Volume Volume 2,629,194 is at 0.8x the 20-day average of 3,306,524, indicating subdued trading activity before this launch. normal

Technical Shares trade above the 200-day MA of 29.63 with price at 41.99, hovering just below the 52-week high of 42.11.

Peers on Argus

ALGM gained 1.01% while peers were mixed: SMTC rose 4.31% but CRUS, PI, SLAB, an...

ALGM gained 1.01% while peers were mixed: SMTC rose 4.31% but CRUS, PI, SLAB, and SITM declined between 0.39% and 1.97%, pointing to a stock-specific move rather than a broad sector trend.

Historical Context

5 past events · Latest: Feb 03 (Positive)

Pattern 5 events

Date	Event	Sentiment	Move	Catalyst
Feb 03	Leadership promotions	Positive	+3.9%	Senior operations and CTO appointments to support manufacturing and technology strategy.
Jan 29	Earnings results	Positive	+9.9%	Q3 FY2026 sales and EPS growth with strong automotive and industrial demand.
Jan 13	Analyst Day announcement	Positive	+2.0%	Planned Analyst Day to discuss strategy, growth, and target financial model.
Jan 08	Earnings date notice	Neutral	+2.1%	Scheduling announcement for Q3 FY2026 results and conference call details.
Jan 05	Product portfolio expansion	Positive	+5.7%	Expanded SiC gate driver portfolio targeting AI data centers and EV applications.

Pattern Detected

Recent company news, including product expansions and corporate updates, has frequently coincided with positive share reactions, especially around earnings-related events.

Recent Company History

Over the past months, Allegro has reported stronger financial performance, including Q3 FY2026 sales growth and a return to profitability, while also expanding its power and sensing portfolio for AI data centers, EVs, and industrial markets. Corporate developments such as leadership changes and an upcoming Analyst Day have also drawn positive stock responses. Today’s current-sensing product launch continues the theme of strengthening Allegro’s positioning in high-performance power electronics.

Market Pulse Summary

This announcement highlights Allegro’s push to strengthen its current sensing portfolio with the ACS...

Analysis

This announcement highlights Allegro’s push to strengthen its current sensing portfolio with the ACS37017, targeting accuracy-sensitive applications in AI data centers, xEVs, and clean energy. Combined with earlier portfolio additions, the company now addresses speed, density, and accuracy across power designs. In context of recent sales growth and product expansion, investors may watch adoption momentum, design wins in high-voltage platforms, and how these offerings support Allegro’s longer-term financial model.

Key Terms

hall-effect, sic, common-mode capacitance, emi

4 terms

hall-effect technical

"introduced the ACS37017, a new Hall-effect current sensor that sets the industry"

A hall-effect is a physical phenomenon where a magnetic field pushing on an electric current in a material creates a small voltage at right angles to both; sensor devices measure that voltage to detect magnetic fields, position, speed or current. Investors care because hall-effect components are key parts in electric motors, vehicle sensors, power electronics and consumer devices; their performance, cost and supply affect a maker’s product competitiveness and revenue potential, much like a reliable engine part determines a car’s usefulness.

sic technical

"sensor protects fast-switching GaN and SiC platforms where nanoseconds matter."

Sic is a short notation placed immediately after a quoted word or passage to show the text is reproduced exactly as it appeared in the original source, even if it contains a typo, odd phrasing, or factual error. For investors, it signals that any mistake or unusual wording came from the original speaker or document, not from the publisher—like an editor saying “this is how it was said,” which helps with accuracy, responsibility, and legal clarity.

common-mode capacitance technical

"Key technical claims include up to 15x reduction in common-mode capacitance and"

Common-mode capacitance is the small electrical coupling that lets the same unwanted signal or noise appear on multiple conductors or relative to ground, rather than between the conductors themselves. For investors, it matters because this hidden coupling affects product performance, interference control and regulatory compliance—like a shared draft slipping under two doors at once—impacting design costs, reliability and time to market.

emi technical

"reduction in common-mode capacitance and up to 20dB EMI improvement."

An EMI is a UK tax-advantaged employee share option plan that lets a company grant executives and staff the right to buy shares at a preset price after a vesting period. It matters to investors because it aligns employees’ incentives with company performance—like giving key workers a stake in the business—while potentially diluting existing shareholders and changing future earnings per share when options are exercised.

AI-generated analysis. Not financial advice.

New ACS37017 completes a strategic portfolio expansion, giving engineers the right tools to master power design’s core challenges: Speed, Power Density, and Accuracy.

MANCHESTER, N.H., Feb. 10, 2026 (GLOBE NEWSWIRE) -- Allegro MicroSystems, Inc. (“Allegro”) (Nasdaq: ALGM), a global leader in power and sensing solutions for motion control and energy-efficient systems, today introduced the ACS37017, a new Hall-effect current sensor that sets the industry benchmark for accuracy. With the launch of the ACS37017, Allegro completes a strategic expansion of its high-performance portfolio that now includes definitive, market-leading solutions for the three critical challenges in modern power electronics: Speed (ACS37100), Power Density (ACS37200), and Accuracy (ACS37017).

As power converters in AI data centers, electrified vehicles (xEVs), and clean energy systems push for higher efficiency, one size doesn’t fit all. Designers seek specialized solutions tailored to their specific performance objectives. The factory-calibrated ACS37017 answers the call for accuracy, integrating high-voltage isolation with an advanced sensing architecture to achieve an industry-leading 0.55% typical sensitivity error over lifetime and temperature. This level of accuracy delivers the high-fidelity feedback required to stabilize high-voltage power conversion systems.

The Right Tool for Every Job
The ACS37017 serves as the standard-bearer for accuracy in Allegro’s newly expanded lineup and joins two recently launched market-leading current sensors that offer a solution for key design priorities:

• Speed: The ACS37100, powered by XtremeSense™ TMR technology, delivers industry-leading 10-MHz bandwidth. Recently named an EDN Product of the Year, the sensor protects fast-switching GaN and SiC platforms where nanoseconds matter.
• Power Density: The ACS37200 leads the market in density, featuring a 50 µΩ conductor that slashes power loss by up to 90% and shrinks footprint by up to 95% for space-constrained applications compared to competing solutions.
• Accuracy: The new ACS37017 completes the toolkit. With 0.55% typical accuracy, it offers the ultra-low drift and precise signal conditioning required for the most demanding control loops in high-voltage power conversion.
  
  

“Our philosophy is simple: we want to give engineers the right tool for the job,” said Matt Hein, Business Line Director of Current Sensors at Allegro MicroSystems. “We don’t force a compromise. If you need to catch a fault in 50 nanoseconds, we have the award-winning ACS37100 XtremeSense™ TMR current sensor. If you need to sense high power in a tiny footprint, we have the high-density ACS37200. And now, with the ACS37017, if your priority is absolute accuracy, we have the definitive solution. Across the board, we are delivering ‘Sensing Leadership’ in every metric that matters.”

Solving the "Drift" Problem
Conventional sensors often suffer from "drift," a degradation of accuracy as temperatures change or the component ages. The ACS37017 offers highly stable performance thanks to Allegro’s proprietary compensation architecture. This technology actively maintains precise measurements, ensuring that control loops remain stable and efficient over the entire life of the vehicle or power supply.

System-Level Simplicity
Beyond raw accuracy, the ACS37017 simplifies system architecture by integrating a stable, non-ratiometric voltage reference that eliminates the need for external precision voltage reference components on the PCB. This not only reduces the bill of materials (BOM) and saves board space but also removes a major source of system-level noise and error, allowing the sensor to deliver a pristine signal directly to the microcontroller.

ACS37017 Features and Benefits:

• Unmatched Accuracy: Achieves 0.55% typical sensitivity error over temperature and lifetime for tighter control loops and higher system efficiency.
• Lowest Drift Performance: Proprietary compensation architecture ensures long-term stability, improving system reliability.
• Simplified Design: Integrated precision voltage reference removes external components and noise sources.
• High-Voltage Isolation: Robust reinforced isolation ensures safety in high-voltage xEV and industrial systems.
• Compact, Standard Footprint: Monolithic surface-mount leaded package offers high isolation without the bulk of module-based alternatives.
  
  

Designers can request the preliminary datasheet and engineering samples for the ACS37017 now at: www.allegromicro.com/acs37017

About Allegro MicroSystems   
Allegro MicroSystems, Inc. is leveraging more than three decades of expertise in magnetic sensing and power ICs to propel automotive, clean energy and industrial automation forward with solutions that enhance efficiency, performance and sustainability. Allegro’s commitment to quality drives transformation across industries, reinforcing our status as a pioneer in "automotive-grade" technology and a partner in our customers' success. For additional information, visit https://www.allegromicro.com/en/.

Media Contact:    
Andrew MacLellan  
Corporate Communications   
(617) 633-4909   
am@embedded-pr.com   

Allegro Contact:    
Ram Sathappan
Vice President of Global Marketing and Applications
rsathappan@allegromicro.com

A photo accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/66c7c653-c4b6-4442-8336-c4151bb1fbe4

FAQ

What accuracy does the Allegro ACS37017 (ALGM) current sensor provide?

The ACS37017 delivers 0.55% typical sensitivity error over temperature and lifetime. According to the company, this factory-calibrated accuracy aims to provide high-fidelity feedback for tight control loops in high-voltage power conversion systems.

How does the ACS37017 simplify system design for ALGM customers?

The sensor integrates a stable, non-ratiometric voltage reference, removing the need for external precision components. According to the company, this reduces BOM, saves board space, and lowers system-level noise and error for cleaner MCU signals.

What isolation and package features does the Allegro ACS37017 offer?

The ACS37017 includes reinforced high-voltage isolation in a compact monolithic SMD leaded package. According to the company, this provides safety for xEV and industrial applications while avoiding bulky module-based alternatives.

How does the ACS37017 fit into Allegro’s current-sensor product lineup?

The ACS37017 completes a three-product toolkit focused on accuracy, speed, and power density. According to the company, it complements the ACS37100 (10 MHz bandwidth for speed) and ACS37200 (ultra-low conductor loss for density).

Where can engineers request ACS37017 samples or the preliminary datasheet for ALGM?

Engineers can request the preliminary datasheet and engineering samples via Allegro’s product page for the ACS37017. According to the company, sample and datasheet requests are available now on the company website.