Allegro MicroSystems, a global provider of power and sensing solutions for motion control and energy-efficient systems, has introduced the first commercially available magnetic current sensor to achieve 10-MHz bandwidth using its XtremeSense TMR (tunneling magnetoresistance) technology.
The new ACS37100 TMR current sensor is designed to help power system engineers optimize control in high-speed applications using GaN and SiC FETs. These technologies are central to electric vehicles (EVs), clean energy converters, and data centers.
With an industry-leading 50 ns response time, the device provides precise current feedback necessary for efficiency and protection in fast-switching power stages.
As EV powertrains and charging systems migrate to GaN and SiC architectures, switching frequencies increase significantly, making conventional magnetic current sensors inadequate for maintaining accuracy and stability.
The ACS37100 addresses this challenge with its wide bandwidth and low noise of 26-mA RMS across the full 10 MHz range, enabling high-fidelity current measurement for improved control and reduced energy loss.
Features
- Highest bandwidth: Dc to 10 MHz
- Fast response time: 50 ns
- Low noise: 26 mARMS at full 10 MHz bandwidth
- Integrated reinforced isolation: 5 kV (60 seconds per UL 62368-1)
- Low loss: 1.2 mΩ internal conductor resistance
- Automotive-grade 0: -40° to +150° C operating temperature range
“The ACS37100 represents a major advance for magnetic current sensing,” said Matt Hein, business line director of Current Sensors at Allegro. “Our TMR technology delivers the speed and precision needed to fully leverage wide bandgap semiconductors in next-generation EV and clean energy platforms.”
The sensor is available in an industry-standard SOICW-16 package with 8mm creepage and clearance, featuring a voltage reference output and adjustable overcurrent fault.
Filed Under: Sensors, Technology News