Freescale MPL3115A2 pressure sensor / altimeter

Posted by Charbax – July 11, 2011

Freescale launches the new altimeter MPL3115A2. This device uses a piezoresistive bridge as its sensor element. It also includes a dedicated ASIC which performs ADC conversions, oversampling, trim compensation, data path calculations and I2C port control. What this means is that your next smartphone can detect on which floor you are in a building, it can detect the altitude of your smartphone in theory to as small a distance as 3cm (they guarantee 30cm because of potential interference and uncertainties). IT can also do barometric weather forecast and measure the ambient temperature. When you combine this new sensor with all the other sensors in a device such as accelerometer, gyroscope, magnetometer you can get a complete inertial navigation system which helps you to have a more accurate positioning for indoor and outdoor navigation.