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Infineon XENSIV Stray field Robust linear TMR sensor

Feb 3 2024 2024-02 Sensors Infineon Technologies
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Infineon Technologies combines its proven expertise in magnetic position sensor technology with proven linear tunnel magnetoresistance (TMR) technology to introduce the XENSIV TLI5590-A6W magnetic position sensor. The sensor is available in a wafer-scale package for linear and angular incremental position detection.

     Infineon Technologies combines its proven expertise in magnetic position sensor technology with proven linear tunnel magnetoresistance (TMR) technology to introduce the XENSIV TLI5590-A6W magnetic position sensor. The sensor is available in a wafer-scale package for linear and angular incremental position detection. This semiconductor device complies with the JEDEC JESD47K standard and is suitable for industrial and consumer applications and can replace optical encoders and decoders, especially for zoom and focus adjustment of camera positioning lenses.

 

     The TLI5590 is a low-field sensor that uses Infineon's TMR technology developed specifically for high-capacity sensor systems. Therefore, the sensor has the characteristics of ultra-high sensitivity, low jitter and low power consumption. Compared to linear Hall sensors, TMR sensors have better linearity, less noise and lower hysteresis. Its high signal-to-noise ratio and low power consumption enable cost-effective magnetic circuit design with low power consumption.

 

     As a result, the new sensor is capable of accurate detection in the case of rapid changes in direction. The TLI5590 consists of two TMR Wheatstone Bridges, where the TMR resistance depends on the direction and strength of the external magnetic field. Combined with a multipole magnet, each bridge can provide a differential output signal, namely a sine and cosine signal. After further processing, these signals can be used to measure relative positions.

 

     The sensor comes in a very small 6-ball wafer-level package SG-WFWLB-6-3. Due to the higher integration density, the size of the sensor can be reduced to support miniaturization and position detection of micro-systems. The TLI5590-A6W achieves ultra-high precision precision measurements up to 10µm by using a suitable linear or rotary magnetic encoder. With a maximum operating temperature of +125°C, the sensor can be flexibly used in a variety of industrial and consumer applications. It is also the sensor of choice for use in a variety of harsh environments due to its high temperature stability.

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