TDK Corporation is expanding its portfolio of tunnel magnetoresistance (TMR) angle sensors with the TAD2140 type in a TO-6 package for automotive and industrial applications. The new sensor provides an innovative system-in-package solution for PCB-less applications. It includes two full TMR bridges, a dedicated ASIC for signal conditioning and integrated passive components. They also feature an angle accuracy of 0.2 , achieving an angle error of only 0.05 at room temperature, the company said. They are capable of contactless sensing from 0 to 360 over a temperature range of 40 C to +150C. The sensor’s fast response, high angular accuracy, and advanced compensation algorithms make it ideal for the optimization of motor control applications such as brushless DC motor commutation. It is also suited for applications with limited available space, such as steering motor commutation.
It comes in a new TO-6 package that integrates six capacitors and one resistor. The sensor can be welded or soldered directly onto a package lead, a connector or a terminal, eliminating the need for a PCB, thus reducing total system size and cost. By using fewer external components and lowering the number of solder joints, long-term reliability of the overall system is improved, the company said. The new product uses an embedded DSP from ICsense, an ASIC design specialist that TDK acquired in 2017, the company said. Thanks to the integrated static and dynamic compensation functions of the ASIC, design-in effort is considerably reduced, according to TDK. The sensor can compensate drifts of gain, offset or orthogonality as well as mechanical non-idealities like magnet tilt or displacement. In addition, the implemented algorithms allow higher assembly tolerances of mechanical components or increase of the system performance with existing solutions.
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