Magnetic sensors Infineon XENSIV™ magnetic sensors - highest accuracy and quality for automotive, industrial, and consumer applications
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Infineon’s XENSIV™ range represents the broadest portfolio of sensor solutions on the market. Industry-leading, proprietary technology ensures all products are the best-fit solution for applications spanning the automotive, industrial, and consumer fields.
Magnetic sensors work by detecting the presence of a magnetic field and providing actionable data regarding the positioning, speed, rotation, and/or direction of movement of an object, gifting systems with the ‘sight’ necessary to interpret the world around them and respond accordingly. In practice, this allows for the commutation of brushless motors, the measurement of wheel, crank, and transmission speed, object detection for door closing, window lifting and automatically activating/deactivating functions, among other applications.
Infineon’s magnetic field sensors feature entirely contactless designs, allowing for unparalleled longevity with minimal wear and tear over time. Broad temperature ranges, high stability of magnetic thresholds, and advanced protection technology, such as short-circuit, and reverse voltage protection ensure sensors can be employed anywhere, even in traditionally inhospitable operating environments. A range of interface and connection options also allow for seamless integration into existing and new systems with the option to select from numerous automotive and industry-compliant sensors.
Infineon offers magnetic sensor types which incorporate AMR, GMR, TMR, and Hall technology to provide the best fit for every situation. Position sensors are further divisible by the type of positional data required; magnetic switches, linear sensors, angle sensors, and 3D magnetic sensorsMeanwhile, magnetic speed sensors use Hall, GMR and next-generation TMR technology to measure speed and directional data within safety and powertrain applications. Though much of Infineon’s magnetic sensor portfolio is dedicated to providing solutions for the automotive industry, the TLI49x and TLV49x ranges are designed to accommodate the industrial and commercial sectors respectively.
Types of magnetic sensors
Infineon’s portfolio of magnetic sensors is divided into two types: magnetic position sensors and magnetic speed sensors. Each magnetic field detection sensor benefits from the highest standards of accuracy, versatility to function within a range of operating parameters, and exceptional reliability.
Magnetic position sensors identify the presence of a magnetic field to accurately detect the positional data of an object. Magnetic speed sensors are responsible for detecting the speed (and direction, should it be required) of rotating target wheels. For automotive applications, these magnetic sensors have been broadly categorized by function within the cam- and crankshaft, wheels, and transmission systems, and are used to inform everything from the speedometer to the ABS and - increasingly - autonomous driving.
All magnetic position sensors interpret a proximal magnetic field in order to relay positional data; however, the way in which they interpret that field and relay information is what differentiates them. Though magnetic position sensors are extremely versatile across applications, some are more suited to certain applications than others.
Magnetic switches and magnetic latches operate upon the Hall effect principle to detect the presence of a magnetic field. Minimal energy consumption and considerable temperature operation ranges make them ideally suited for cross-industry proximity detection within a range of environments. The TLE496x family of magnetic sensors is designed for automotive application and conforms to rigorous AEC-Q100 standards. Applications include
BLDC commutation, window lifting, power closing, and safety features, such as seat belt detection. TLI496x magnetic sensors are built to industrial standards and are equally effective in BLDC commutation, as well as index counting, and general open/close detection. Finally, TLV96x sensors furnish the commercial sector with cost-effective, reliable solutions for increasingly automated ‘smart’ environments.
Linear sensors measure a magnetic field across a horizontal axis and relay a proportional signal for precise angular and linear position detecting. The TLE499x family is employed in automotive safety-critical applications, such as pedal position detection, electric power steering, and throttle control, as well as more basic systems like seat and headlight adjustments. Infineon linear magnetic field sensor ICs are available with analog, PWM, SENT, and SPC interfaces for reliable results, regardless of the system. Models like the TLE4998 even include advanced resistance against common stresses, such as volatile moisture and temperature levels.
Infineon employs angle sensors (AMR, GMR, and TMR) to measure the sine and cosine angle of a magnetic field and precisely relay its orientation. The TLE5501 TMR and TLE5109A16 AMR range of these magneto-resistive field sensors are built to address applications where precision, speed, and cost-effective build are all required. These include BLDC motors, steering angle measurements, and actuators. Infineon’s GMR portfolio is ready-to-use immediately and available in varying degrees of customizability.
3D magnetic sensors
3D sensors offer an unprecedented degree of control by tracking a magnetic field across all three axes, making them suitable for linear, rotational, and three-dimensional tracking. The TLE493D-P2B6 is the latest and greatest to join the Infineon roster of revolutionary 3D magnetic sensor systems, with options specifically suited for the automotive, industrial, or commercial sectors and optimized for minimal energy consumption, form factor, and temperature stability. The range of potential applications is considerable but includes, anti-tampering devices, high sensitivity joysticks (e.g., medical, industrial), and multifunctional control elements.
Infineon’s magnetic speed sensors employ Hall, GMR and TMR technology to offer highly sensitive, reliable, and accurate speed and direction information. Though finding considerable application within the automotive industry, similar industrial magnetic sensor applications are also common.
- Crank speed sensors
The TLE4921-5U delivers AEC-100 qualified reliability while remaining cost-effective and is suitable for use within entry-level speed sensing circuits, such as speedometers. The TLE4922 has been designed for advanced robustness and its high air gap operating range, vibration immunity, and advanced protection technology make it perfect for unforgiving industrial and automotive environments. TLE4929 is a next-generation magnetic Hall field sensor chip particularly suited to crankshaft monitoring and is one-to-one replaceable with previous crankshaft sensors, outfitting new and existing systems with speed and direction detection. Improved temperature performance, significantly reduced jitter, and a higher air gap make it a leader in magnetic sensor technology and particularly suited for application within the latest automatic transmission systems.
Cam speed sensors
The Infineon XENSIV™ TLE4988C products – part of the latest generation of Infineon’s successful TLE498x family - feature advanced camshaft sensing performance and improved application adaption. One major benefit of the advanced sensor performance is the reduced dependence from rare-earth backbias magnets. Even with a ferrite backbias magnet the TLE4988C performs perfectly for all relevant parameters, such as phase jitter, phase accuracy, or speed effect across key temperature, air gap and rpm ranges. Automatic in-car TPO calibration ensures a most accurate start up sensing in real application. Infineon´s TLE4988C products are available for the use with three different backbias magnet materials: Ferrite, SmCo and NdFeB.
Wheel speed sensors
Where once magnetic wheel sensors and their applications were restricted to the ABS, the cars of tomorrow are dependent upon accurate wheel speed data for an extensive list of safety and user requirements. From automatic door locking to adaptive multimedia systems and autonomous driving functions, the magnetic speed sensor equips the modern automobile with the intelligence it requires. The best-selling TLE4941plusC sensor is designed for wheel speed detection and can be complemented with optional direction detecting and complete disturbance resistance, marking one of the industry’s leading magnetic sensor systems. TLE5045iC /46iC are the next iteration of GMR speed sensors equipped with optional direction detection, zero-speed capabilities, and self-diagnostics for a one-stop solution for all wheel speed sensing applications.
TLE5549 – new TMR magnetic sensor for autonomous parking and
The XENSIV TLE5549 is Infineon’s first wheel speed sensor (WSS) with high resolution and fast direction detection based on TMR Technology. It is designed for use in sophisticated vehicle control systems and autonomous parking applications. While state-of-the-art wheel speed sensors come with an uncertainty margin of up to ±6 cm in relation to direction of rotation, TLE5549iC establishes the rotational direction of the wheel after less than ±0.5 cm of movement. This high resolution is enabling additional use cases such as automated parking in tight spaces, autonomous trailer connection, and much more. It also improves the accuracy of vehicle positioning estimations in areas where the GPS signal is weak.
Transmission speed sensors
The TLE4955 offers best-in-class vibration suppression, a broad operating temperature, and dynamic self-calibration, while still providing precise speed measurements, making it ideally suited to transmission systems that require a two-wire current interface. The TLE4959C(-FX) and TLE4959-5U(-FX) magnetic sensors offer superior speed and direction sensing for 3-wire and 4-wire interfaces respectively and can be customized for integration into automatic and hybrid transmission systems.
Magnetic sensors are essential to the automotive industry. A magnetic vehicle sensor of some description is present in a range of applications spanning the breadth of engine function, safety-essential features, and quality of life touches. Speed sensors relay critical data regarding the speed and direction of the crank, wheels, and transmission, enabling major systems, such as speedometers, antilock brakes, automatic transmissions, and park assistance to function. Magnetic position sensors for automotive applications are responsible for everything from closing windows and sunroofs, seat belt detection, and headlight adjustment to indispensable applications for BLDC commutation, power steering, and throttle control.
Though the demand for magnetic field detection sensors is largest within the automotive industry, there is also considerable potential within the industrial and consumer sectors. As the largest magnetic sensor manufacturer globally, Infineon is proud to cater to the requirements of all three sectors with sensors specifically optimized for harsh operating conditions, cost-effectiveness, reduced energy consumption, and a vast number of other tailorable advantages dependent on the industry and application.
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