TDK introduces new redundant analog TMR Angle sensors for safety-related applications

     TDK Corporation expands its range of tunnel magnetoresistance (TMR) Angle sensors with the introduction of the TAS8240 sensor for automotive and industrial applications. The new sensor is available in compact QFN16 (3 x 3 mm²) and TSSOP16 (5 x 6.4 mm²) packages for four redundant analog single-ended SIN/COS outputs and low power consumption. This sensor facilitates accurate Angle measurement for high performance in confined space environments. As a 360° Angle sensor, the TAS8240 is ideal for precise measurement of rotor position in brushless DC motors used in safety-critical devices such as power steering, brake boosters or traction motors. *TAS8240 is now in mass production and samples are available.

     The sensor contains four pairs of TMR half-bridges and provides four separate SIN/COS outputs by applying a magnetic field in the x-y plane. Then, even in the event of a failure of one of the output signals, a higher level of system security up to ASIL Level D can be achieved, while providing higher availability of location information.

     The QFN16 package is a surface mount technology (SMT) solution that occupies a much smaller area than the TSSOP16, making it ideal for space-constrained applications. Wettable side panels help guarantee welding quality and are suitable for automotive grade scenarios. Depending on the architecture of the system, the new sensor can also support the concept of failure without affecting operation.

     TDK's premier TMR technology benefits from the company's long-standing expertise in magnetic sensor technology and optimizes its sensor products by successfully integrating sophisticated TMR technology into small packages. The angular accuracy of the sensor is stable at different temperatures and over the life of the sensor. The deterministic behavior of TAS8240 over the extended magnetic field opens up new application scenario possibilities, even in demanding environments.