Advancing magnetic sensing with Allegro MicroSystems’ Tunnel Magnetoresistance (TMR) technology
that measurements are accurate, without the need for complex compensation algorithms. In terms of thermal stability, TMR sensors offer a stable performance over a broad temperature range, typically from -40°C to 150°C. The stable performance of these sensors ensures reliable operation
measurements. These sensors leverage the inherent benefits of TMR technology, such as higher sensitivity, low power consumption, wide dynamic range, and industry-leading performance over a temperature range from -40°C to 150°C. XtremeSense Crocus Technology TMR sensors incorporate sophisticated signal conditioning and digital processing (DSP) capabilities to improve sensor performance and ease of use. Signal conditioning circuits, such as low-noise amplifiers and filters, amplify and process the sensor output to reduce SNR and minimize the effect of external noise. These circuits have been carefully designed to match the characteristics of the TMR sensor, ensuring optimal performance and signal integrity. Allegro TMR technology uses differential sensing to reject stray fields, this ensures stable and reliable sensor performance in a broad range of operating conditions. This technology is crucial in applications where sensors are exposed to strong magnetic fields or where multiple sensors will be placed in close proximity, as it prevents crosstalk and interference. In addition to EMI shielding, Allegro’s unique packaging allows for multiple sensors and
signal conditioning circuitry to be built into a single package. This integration simplifies system design, reduces the overall footprint, and improves signal integrity. By combining the TMR sensor with advanced signal conditioning and processing circuitry, XtremeSense sensors minimize the need for external components and reduce the design complexity for engineers. TMR also includes digital interfaces, such as I2C and SPI, which allows them to be integrated with microcontrollers, digital signal processors, and other digital systems for easy configuration, control and data readout from sensors. These interfaces have advanced features like programmable gain settings, filtering options, and self-calibration, offering designers greater flexibility and control over sensor performance. Key applications In the automotive sector, TMR sensors are instrumental in enabling advanced driver assistance systems (ADAS) to enhance vehicle safety and performance. For example, these sensors can be used for position sensing in electric power steering systems, providing accurate feedback on steering
in harsh environments, such as automotive and industrial
applications, where sensors can be exposed to extreme temperatures and temperature fluctuations.
Product highlight: Allegro MicroSystems’
XtremeSense TMR sensors Lastly, TMR sensors are inherently robust and reliable, with a solid- state design that eliminates moving parts and reduces the risk of mechanical failure. For example, the MTJ structure itself is resistant to mechanical stress, vibration, and shock. TMR sensors also demonstrate resistance to radio frequency interference, making them suitable for noisy electrical environments. Allegro MicroSystems’ XtremeSense TMR portfolio includes a wide range of sensors optimized for various applications ranging from position sensing to high-bandwidth current
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