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MEMS sensor tracks air pressure

Posted: 25 Feb 2009 ?? ?Print Version ?Bookmark and Share

Keywords:MEMS sensor? sensor pressure? portable devices navigation?

Epcos AG introduces a compact MEMS pressure sensor at Electronica & Productronica 2009 in Shanghai, China. At 1.7mm x 1.7mm x 0.9 mm, the pressure sensor is said to be "many times smaller than comparable competitor products," allowing it to be integrated into portable electronics devices. For example, it could be used to enable portable navigation devices, watches and mobile phones to measure air pressure and/or altitude above sea level.

The MEMS-version T5000 is a surface mount device that is said to be well suited to integration in mass-market products that require highly automated production processes. Epcos also has a conventionally packaged sensor variant, the ASB1200E SMD pressure sensor. This has a 3mm x 3mm footprint and features a gel-protected stainless steel pressure port. Epcos envisions that it will enable further miniaturization of barometric applications that are exposed to high humidity. The T5000 and ASB1200E sensors boast absolute pressure measurement of 300mbar to 1,200mbar and cover a measurement range of 20mV/V/bar. At the heart of the both devices is a piezo-resistive MEMS sensor chip made by Aktiv Sensor, a wholly owned subsidiary of Epcos.

Samples of the T5000 and ASB1200E are now available. Meanwhile, the company says that near-future developments will include a pressure sensor with integrated temperature compensation and a digital interface.

- Vanessa Knivett
Analog Designline Europe

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