Highly accurate angular and linear position detection in automotive and industrial applications
Magnetic linear position sensors are programmable analog or digital sensors for highly accurate angular and linear position detection in automotive and industrial applications. They are used to detect the position of a rotating or linear object, such as a shaft or piston. The position measurement with a linear (Hall) sensor can be either absolute or incremental. Absolute linear sensors provide an output that corresponds to the absolute position of the object being measured, while incremental linear sensors provide an output that corresponds to the velocity and direction of movement of the object being measured.
Linear sensors are available in a variety of different configurations, such as Hall effect, magnetostrictive, optical, inductive, capacitive, and resistive. In automotive applications, linear Hall effect sensors are used in electronic power steering (ESP) applications or to detect the position of the throttle, clutch, or brakes, for example. In industrial applications, they are used to detect the position of conveyor belts, cylinders, gears, and other moving objects.
For further information on the range of Infineon magnetic linear position sensors and how they can be used within your application, contact us today or use our interactive sensor selection tool to find the best fit for your design.
Infineon’s portfolio of XENSIV™ linear magnetic sensors offers a wide range of solutions for different automotive and industrial applications, including high-sensitivity linear Hall effect sensors with integrated signal processing for contactless position sensing.
All the means are there to satisfy state-of-the-art functional safety standards at a system level with our latest TLE4999 Infineon XENSIV™ linear Hall sensors. Designed, produced, and certified in strict accordance with ISO 26262 standards, these sensors combine two sensing elements on the same monolithic silicon design, providing high redundancy on a single chip. The linear Hall effect sensor IC contains two distinct Hall sensor components (“main” and “sub”). A plausibility check aids in the achievement of high diagnostic coverage for premium functional safety systems that are ASIL D compliant.
Infineon's TLE499x linear Hall IC family is ideal for demanding angular and linear position detection and current measurement applications. We designed our sensors to measure the vertical component of a magnetic field and generate a signal directly proportional to it. For a perfect fit to varying applications the sensor has programmable signal conditioning like clamping, low pass filtering or gain adjustment. Our portfolio includes three different interface options: PWM, SENT, and SPC.
When it comes to torque-sensing via steering torque sensors, Infineon's TLE499x series of highly accurate linear Hall sensors are designed for such applications. These linear Hall effect sensors also support PWM, SENT, SPC, or ratiometric analog output to maximize compatibility with a variety of Electronic Control Units (ECU) designs. Single-sensor leaded packages and dual- or single-sensor packages are also offered.
In addition to associated electronic circuitry, a linear sensor will generally consist of a sensing element, such as a magnetoresistive element or a Hall effect device. Infineon utilizes Hall sensor technology for all linear sensors, ensuring continual high sensing performance with exceptional accuracy.
A Hall effect linear position sensor is a semiconductor device that produces a voltage proportional to the applied magnetic field. When placed in a magnetic field, the device generates a small voltage across its terminals. The amount of voltage generated depends on the strength of the magnetic field and the properties of the material from which the device is made. A Hall effect sensor can be used to measure both static and non-static (or changing) magnetic fields. Static magnetic fields are generated by permanent magnets, while non-static magnetic fields are generated by moving electric charges.
Hall effect linear position sensors offer many advantages over other types of position sensors, including:
- high accuracy
- high resolution
- no abrasion
- wide operating temperature range
- immunity to EMI/RFI interference
- resistance to harsh environments
- low cost
Their high accuracy makes them ideal for applications where precise measurements are required. These sensors can provide reliable measurements with a very fast response time, even in rapidly changing environments.
Linear sensors play an important role in a variety of automotive applications. One common use is to measure the position of throttle and pedal controls and subsequently provide data to the ECU to determine how much fuel to inject. Further applications include use in automatic transmission systems, such as gear shift detection, clutch pedal position sensing, and brake sensing. In automotive suspension systems, magnetic linear sensors are used to measure the travel of the shock absorbers to adjust damping for automated head light adjustment.
Industrial and consumer applications
Linear magnetic field sensors are also used across a broad range of position and motion-sensing applications for both manufacturers and consumers. Industry manufacturers use linear sensors to measure the position of objects in assembly lines and automated equipment. Consumer applications include the use of these sensors in devices such as printers, photocopiers, 3D scanners, joysticks, and other high-precision applications.
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Side view of innovative stack-mounted dual-sensor technology with bonding wires
Dual-sensor solutions with two redundant sensors in the place of one
Thanks to the use of innovative stack-mounting technology, the devices of the angle sensor family combine two independent sensors within standard and space-saving TDSO packages which are only about 1 mm thick. It has the same width and length as a conventional single-sensor package. Compared to the common approach of side-by-side sensor placement, the advantages of the top-bottom placement include a more homogeneous magnetic field over the sensing elements and a significantly smaller footprint. This saves precious space and cuts down on expense in safety- critical applications, as a lower-cost ferrite magnet can provide a sufficient magnetic field for the sensors.
Productive Programmer @ eHitex
ED FLASH Production Programmer
SPEED FLASH is a proven universal production programmer. The system was designed to be easily configurable for the programming of different targets. A wide range of interfacing techniques to different targets can be used, depending on the requirements of the sensor or microcontroller to be programmed.
Productive Programmer @ CGS
ISCM-SENT Infineon TLE4998x
The CompactRIO ISCM-SENT (Infineon) module developed by CGS can sequentially calibrate up to 2 Infineon TLE4998x sensors with 2 channels each. In addition, the module can read the SENT signals in parallel on the 4 channels.
Welcome to our new interactive sensor selection tool, designed to connect you with the best fit for your design as quickly and effortlessly as possible. Simply select the overarching industry (automotive or industrial/consumer) and drill down on the applications till you find your target use case. The selection tool will then tell you what Infineon XENSIV™ sensor is the best choice for your design. It couldn’t be easier.
- Detecting linear and angular position
- Detecting pedal and throttle position
- Steering torque measurement
- Headlight leveling
- High-current sensing
- Seat position and occupant detection
- Suspension control
- Detecting gear stick/lever positions
- Detecting liquid levels in fuel tanks
- Current sensing e.g. for battery management