News Item

A miniscule altimeter

STMicroelectronics has introduced a miniature barometric pressure sensor for the likes of smartphones.

The LPS25H miniature barometric pressure sensor is optimised for mobile applications, with an incredibly small size of 2.5 x 2.5 x 1 mm and a very low operating current of 4µA. Ultra-low-noise design gives an accuracy claimed to be within ±0.2 mb - equating to around ±6 ft (±2 m) at sea level.

The manufacturer explains that such sensors can improve indoor navigation, enabling accurate floor detection and enhanced location-based services - and barometric pressure data also aids dead-reckoning calculations and can enable new smartphone apps such as weather analysers and health and sports monitors.

The LPS25H is a micro-electro-mechanical systems (MEMS) sensor which includes enhanced temperature compensation - claiming to allow apps to perform consistently in changing environments. The sensing element detects absolute pressure with a suspended membrane inside a single mono-silicon substrate. An auto-zero capability allows instant accuracy upon entering a building.

Samples of the chip - which can also be used in wearable and industrial applications - are available at $1.40 for 1,000 pieces.

A separate review states that demands for enhanced smartphones and tablets will accelerate the global market for such pressure sensors to $375 (£225, €273) million by 2017 for consumer electronic applications.

Details from STMicroelectronics below . .

  • 03 March 2014
  • RIN

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