In-plane Hall switch rivals MR sensors
The TMAG5134 in-plane Hall-effect switch from TI offers a cost-effective alternative to magnetoresistive (MR) sensors for position sensing. An integrated magnetic concentrator enables detection of magnetic fields as weak as 1 mT in door and window sensors, home appliances, and personal electronics. Its in-plane sensing adds design flexibility by detecting magnetic fields parallel or horizontal to the PC board.
Designers typically do not consider Hall-effect switches as viable replacements for reed switches or tunnel, anisotropic, and giant MR sensors because of their limited sensitivity. The TMAG5134 overcomes this limitation, delivering higher sensitivity than conventional Hall-effect sensors without the added cost and complexity of MR devices.
Operating from a 1.65-V to 5.5-V supply, the TMAG5134 consumes just 0.6 µA on average. Its magnetic concentrator amplifies the sensor signal, eliminating the need for additional bias current. The device offers flexible magnetic pole detection (omnipolar or dual-unipolar) and is available with push-pull or open-drain outputs, in both active-low and active-high configurations. Magnetic operating points range from 1 mT to 2 mT for versatile position-sensing applications.
Manufactured in TI’s advanced 300-mm fabs, the TMAG5134 is available in production quantities on TI.com.
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