As power converters in AI data centers, electric vehicles (xEVs), and clean energy systems strive for greater efficiency, it's clear that a one-size-fits-all solution won't work. Designers require specialized solutions tailored to specific performance goals. The factory-calibrated ACS37017 addresses this need for precision by integrating high-voltage isolation with an advanced sensing architecture, achieving an industry-leading typical sensitivity error of only 0.55% across its entire lifetime and temperature range. This level of accuracy provides the high-fidelity feedback necessary to stabilize high-voltage power conversion systems.
The right tool for every application.
The ACS37017 is positioned as the benchmark for accuracy within the new, expanded Allegro lineup and joins two recently launched leading current sensors, designed to address key design priorities:
Speed: The ACS37100, powered by XtremeSense™ TMR technology, offers an industry-leading bandwidth of 10 MHz. Recently recognized as Product of the Year by EDN, this sensor protects ultrafast switching GaN and SiC platforms, where every nanosecond counts.
Power Density: The ACS37200 leads the market in density, with a 50 µΩ conductor that reduces power losses by up to 90% and decreases design size by up to 95% compared to competing solutions, making it ideal for space-constrained applications.
Accuracy: The new ACS37017 completes the portfolio. With a typical accuracy of 0.55%, it offers ultra-low drift and precise signal conditioning, essential 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 for Current Sensors at Allegro MicroSystems. “We don’t force compromises. If you need to detect a fault in 50 nanoseconds, we have the award-winning ACS37100 with XtremeSense™ TMR technology. If you need to measure high power in a confined space, we have the high-density ACS37200. And now, with the ACS37017, if absolute accuracy is your priority, we have the ultimate solution. On all fronts, we deliver true leadership in sensing.”.
Solving the problem of “drift”
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 patented compensation architecture. This technology actively maintains accurate measurements, ensuring that control loops remain stable and efficient throughout the life of the vehicle or power supply.
System-Level Simplicity
Beyond accuracy, the ACS37017 simplifies system architecture by integrating a stable, non-ratiometric voltage reference, eliminating the need for external precision reference components on the PCB. This reduces the bill of materials (BOM), saves board space, and eliminates a key source of system-level noise and error, allowing the sensor to deliver a clean signal directly to the microcontroller.
Features and Benefits of the ACS37017
: Unmatched Accuracy: Typical sensitivity error of 0.55% over lifetime and temperature range, for more precise control loops and greater system efficiency.
Minimal Drift: Patented compensation architecture ensures long-term stability and greater reliability.
Simplified Design: Integrated precision voltage reference eliminates external components and noise sources.
High Voltage Isolation: Reinforced, robust isolation for high-voltage xEV and industrial applications.
Compact, Standard Form Factor: SMD monolithic package with terminals provides high isolation without the bulk of modular solutions.
