Redundant analog TMR angle sensor in SMT package

Redundant analog TMR angle sensor in SMT package

New Products |
By Nick Flaherty

TDK has launched a compact, cost-effective, redundant TMR sensor with four Wheatstone bridges for angle detection in a surface mount package.

The TDK TAS8240 tunnel-magnetoresistance (TMR) angle sensor has a high angle accuracy of ±1.0° in an ambient temperature range of -40 °C to +150 °C and high stability over temperature, magnetic-field range, and lifetime.

The TMR angle sensor four redundant analog single-ended SIN/COS outputs for safety applications in ASIL-D automotive and industrial applications and is available in both compact QFN16 (3 x 3 mm²) and TSSOP16 (5 x 6.4 mm²) packages.

As a 360° angle sensor, the TAS8240 is suited to accurately measure the rotor position of BLDC motors used in safety critical applications such as power steering, brake boosters, or traction motors.  The deterministic behaviour of the TAS8240 in extended magnetic-field ranges opens up new application possibilities, even in demanding environments.

The sensor contains four pairs of TMR half bridges and provides four separated SIN/COS outputs by applied magnetic field in the x-y plane and follows the TMS4240 four bridge TMR angle sensor launched in 2022.

Higher system safety levels up to ASIL D can be achieved while offering higher availability of position information, even in case of a failure of one of the output signals.

The surface mount QFN16 package provides a significantly smaller footprint compared to TSSOP16 for applications where space is limited. Wettable flank contributes to ensuring soldering quality suitable for automotive grade. Depending on system architectures, fail-operational concepts can also be supported by the sensor.



Package dimensions

Angle accuracy
(after compensation)

Operating temperature range

Analog output

Bridge resistance

Magnetic-field measuring range



5 x 6.4 x 1.1 mm

±1.0 degrees or less (over temperature)
±0.3 degrees (TA= 25 °C, typical)

-40 °C up to 150 °C (ambient)

Single-ended, redundant, 1.5 Vp-p
(at Vcc 5.0 V, ratiometric)

5 kΩ

20 to 80 mT (recommended)


QFN16 (Wettable Flank)

3 x 3 x 0.75 mm



Mass production of the TAS8240 TMR angle sensor has started, and samples are already available.



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