Redundant Analog TAS8240 Series of TMR Angle Sensors for Automotive Applications

TDK Corporation has expanded its tunnel-magnetoresistance (TMR) angle sensor product line with the TAS8240 sensor for automotive and industrial applications.

Available in both compact QFN16 (3 x 3 mm²) and TSSOP16 (5 x 6.4 mm²) packages, it offers four redundant analog single-ended SIN/COS outputs and low power consumption.

It creates precise angle measurements for better performance within small spaces. As a 360-degree angle sensor, the TAS8240 accurately measures the rotor position of BLDC motors used in safety-critical applications such as power steering, brake boosters, or traction motors.

The sensor contains four pairs of TMR half bridges and provides four separated SIN/COS outputs by applied magnetic field in the XY plane. 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 QFN16 package, a surface mount technology (SMT) solution, provides a smaller footprint compared to TSSOP16, making it better for applications where space is limited. A wettable flank ensures that the soldering quality is suitable for automotive-grade tasks. Depending on system architectures, fail-operational concepts can also be supported by the new sensor.

TDK's TMR technology keeps the sensor angle accurate and stable through different temperatures and over the sensor's lifetime.

Features:

Contactless 360-degree angle measurement
High angle accuracy of ±1 degree in an ambient temperature range of -40 to 302°F (-40 to 150°C)
4x single-ended sin/cos output pairs
ASIL D-ready
Low power consumption
Supports radial sensing concepts
Optimized for automotive (AEC-Q100) and industrial applications

Price: Enquire with TDK's USA distributors here.

Applications/Industries:

Absolute rotary angle sensor
EPS motor-shaft angle sensor
Steering wheel angle sensor
E-brake motor angle sensor
Resolver replacement for e-axle/traction motor

Type	TAS8240-BAAA	TAS8240-HAAA
Package	TSSOP16	QFN16 (Wettable Flank)
Package Dimensions (WxHxD)	0.2 x 0.25 x 0.04 in. (5 x 6.4 x 1.1 mm)	0.1 x 0.1 x 0.03 in. (3 x 3 x 0.75 mm)
Angle Accuracy	±1 degrees or less (over temp.) ±0.3 degrees (TA= 25°C, typical)
Operating Temp.	-40 to 302°F (-40 up to 150°C)
Analog Output	Single-ended, redundant, 1.5 Vp-p (at Vcc 5 V, ratiometric)
Bridge Resistance	5 kΩ	-
Magnetic-Field Measuring Range	Nominal: 20 to 80 mT	-