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MEMS pressure sensor drives location-based innovation

Posted: 27 Feb 2014 ?? ?Print Version ?Bookmark and Share

Keywords:sensor? pressure? ST?

ST Microelectronics has devised a miniature pressure sensor that boosts smartphone support for location-based services and high-value apps, in addition to wearable, industrial and smart-home systems.

The LPS25H integrates a MEMS sensing element and IC interface in the same package. The sensing element detects absolute pressure and consists of a suspended membrane realised inside a single mono-silicon substrate. An intrinsic mechanical stopper protects against membrane breakage.

The IC interface is manufactured using a standard CMOS process, which allows a high level of integration and accurate trimming of the circuit to match the characteristics of the sensing element. The temperature compensation algorithm applies second-order (quadratic) correction to achieve accuracy independent of temperature variation over a wide range.

Measuring 2.5mmx2.5mmx1mm, the sensor occupies minimal space and has an operating current of 4?A to preserve battery life. Its ultra low-noise design helps ensure accuracy to within 0.2mbar. It also includes support for ST's LPS25H pressure sensor evaluation kit with dedicated adapter board for the STEVAL-MKI109V2 motherboard.

Coming in a Cavity-Holed LGA package, the sensor is available for sampling, priced at $1.40 for 1000 pieces.





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