Littelfuse Expands Magnetic Sensor Portfolio with High-Precision TMR Angle Sensors

New omnipolar sensors deliver 0–360°angular measurement with enhanced thermal stability and packaging flexibility for harsh environments

ROSEMONT, Ill., August 26, 2025 — Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world, today announced the launch of two new TMR-based magnetic angle sensors – the LF53466 and LF53464 – designed to deliver high-precision 0–360° angular measurement in harsh environments with minimal thermal drift. (View the video.)

Both sensors utilize Tunneling Magnetoresistance (TMR) technology in a dual push-pull Wheatstone bridge configuration, each featuring four high-sensitivity sensing elements, which enable accurate angle detection along the X and Y axes. These sensors offer a compelling alternative to Hall-effect devices by providing superior thermal stability, wide supply voltage compatibility, and enhanced measurement precision.

The LF53466, housed in a standard TSSOP8 package, offers precision angle sensing with an error of less than 0.8° in the 200–800 Gs magnetic field range. It is ideal for industrial and automotive applications that benefit from stronger mechanical solder joints and ease of inspection—such as steering wheel angle sensors, pedal position sensors, and contactless potentiometers.

The LF53464, available in a compact LGA8L package, achieves even greater accuracy—angle error below 0.6°—while enabling wider airgap capability and compatibility with smaller, lower-cost magnets. It is well-suited for space-constrained applications such as rotary encoders, knob and valve position sensing, and consumer devices including power tools and appliances.

Key Features and Benefits

• 0–360° angle measurement with X-Y axis sensing
• TMR technology for enhanced magnetic sensitivity
• Low angle error: <0.8° (LF53466TMR), <0.6° (LF53464TMR)
• Excellent thermal drift compensation for stable performance
• Wide supply voltage range for system design flexibility
• Differential output for robust signal integrity
• Two package options: TSSOP8 (LF53466-08TMR) for ease of assembly; LGA8L (LF53464-08TMR) for miniaturized designs

“These new TMR omnipolar sensors significantly expand the Littelfuse magnetic sensing portfolio by opening access to broader industrial, mobility, and consumer markets,” said Julius Venckus, Global Product Manager, Sensors. “The LF53466 and LF53464 enhance applications requiring speed control and precise angle detection by combining high accuracy, thermal resilience, and packaging flexibility.”

Target Markets and Applications

• Industrial Automation & Robotics
  Rotary position sensors, absolute angle detection, and robotic arm or joystick control for factory equipment and intelligent machinery.
• Mobility and Off-Highway Vehicles
  Steering angle, pedal position, and motor control in e-bikes, 2/3-wheelers, and construction or off-road EVs.
• Consumer and Smart Devices
  Compact sensing in power tools, smart thermostats, and appliances, including knob and valve position sensing for intuitive user interfaces.
• Precision Control Systems
  High-resolution rotary encoders, contactless potentiometers, and angle sensors used across motor feedback, valve actuation, and HMI (human-machine interface) applications.