November 17, 2013. Measurement Specialties has released the low-power MS5806, a compact digital barometric pressure sensor module that operates over an extended pressure range of 10 mBar to 2000 mBar.
The new sensor’s altitude resolution of up to 20 cm makes it suitable for use in altimeters and variometers. Measuring 6.4 mm x 4.0 mm x 2.75 mm, the MS5806 fits in space-constrained devices including high-end thin watches, adventure and multi-mode watches, fitness gadgets, mobile altimeter/barometer systems, and bike computers.
The new 24-bit ΔΣ ADC integrated digital pressure sensor features several different operational modes to optimize conversion speed and current consumption. The sensor converts the device’s uncompensated analog output voltage from the piezoresistive pressure sensor to a 24-bit value, while providing a 24-bit value for the temperature of the sensor as well.
The hermetically-sealed MS5806 features a protective cap constructed of an anticorrosive, polished stainless steel and is filled with a silicone gel protecting the sensor and bonding wires. An optional O-ring placed on the cap’s outer diameter provides water-resistance to 100 m, while avoiding mechanical stresses on the sensor.
The MS5806 uses six coefficients to compensate for process variations for increased measurement accuracy as well as I²C or SPI communication to offer a conversion time down to 0.6 ms. It can be interfaced to virtually any microcontroller.
This new digital barometric pressure sensor module is based on MEMS technology from Measurement Specialties. It operates on 0.9 μA (standby <0.15 μA at 25°C) from a supply voltage range of 1.8 V to 3.6 V; operating temperature range is -40°C to +85°C. It offers ±2.5 mBar typical pressure accuracy (with auto zero at one pressure point). Temperature accuracy is ±0.8°C at 25°C, and temperature resolution is less than 0.01°C.
Pricing for a MS5806 is $11.80 per unit in quantities of 10,000.
www.meas-spec.com/product/pressure/MS5806-02BA.aspx
