Precise position feedback is critical in everything from steering systems to robotic joints, yet keeping that accuracy when temperatures swing or when the installation space is limited is a tougher challenge. Littelfuse’s new LF53466 and LF53464 angle sensors have been developed with exactly that problem in mind, offering 0–360° magnetic measurement with stability that holds up in the field.
Rather than relying on Hall-effect sensing, these parts use Tunneling Magnetoresistance (TMR) technology. It’s a subtle difference in physics that brings clear practical benefits. TMR structures respond more strongly to magnetic field changes, which means the output is cleaner, resolution is higher, and performance holds steady even when the sensor-to-magnet distance varies. Littelfuse has built each device around a dual Wheatstone bridge, with four high-sensitivity elements per axis, allowing accurate X–Y measurement without physical contact.
Two Designs for Different Priorities
For applications where assembly strength and easy inspection are important, the LF53466 comes in a TSSOP8 package. It maintains an angular error under 0.8° across a 200–800 Gs magnetic range, and its thermal compensation allows it to operate reliably from –40 °C to +150 °C. This combination suits it to automotive steering angle measurement, pedal position detection, and heavy-duty industrial controls.
The LF53464 takes the same sensing approach and scales it down to a 3 × 3 × 0.75 mm LGA package. Accuracy improves further, with error reduced to below 0.6°, and it works happily with smaller magnets and wider airgaps. That opens up options for compact rotary encoders, appliance control knobs, and valve position feedback in both consumer and industrial products.
Built for Real-World Conditions
Both devices produce differential sine and cosine outputs, which helps reject electrical noise in environments crowded with motors and switching power electronics. Wide supply voltage compatibility makes integration straightforward, while the contactless sensing approach removes mechanical wear points that could otherwise limit product life.
By bringing these two parts to market, Littelfuse is pushing its magnetic sensing line further into high-accuracy control systems where size, robustness, and reliability all matter. Whether mounted deep inside an off-highway vehicle or tucked behind the dial of a smart appliance, they are designed to give consistent readings long after other sensing approaches start to drift.
Learn more and read the original announcement here.
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