Application Note

Bosch Sensortec

BlueBox Demo-Board for the digital sensors AN18002

SMB365 (acceleration) and SMD500 (pressure)

or differential pressure, change in weather and many more can all be measured and visualized in real-time.

1.1.1Acceleration Part (SMB365)

In order to measure the above mentioned acceleration specific signals, the BlueBox demo board is equipped with the Bosch Sensortec SMB365 acceleration sensor. This digital, triaxial accelerometer, on the basis of the differential capacitive principle, is able to measure low gravity accelerations in two ranges (±2g and ±10g full scale) in all 3 directions in space, the X, Y and Z direction with a resolution of 0.004g in the low g range. The alignment of the positive X, Y and Z direction according to the acceleration sensor is described in the illustration [1.1] above. The SMB365 is based on automotive proven Robert Bosch technology for silicon surface micro- machining processes. This has been proven in more than 200 million Bosch accelerometers so far.

1.1.2Pressure Part (SMD500)

Additionally to the accelerometer, the BlueBox board is equipped with another Bosch Sensortec product, the SMD500 pressure sensor, which marks a new generation of high precision digital pressure sensors for consumer applications. The SMD500 is based on piezoresistive technology for EMC robustness, high accuracy and linearity as well as long term stability. Its ultra low-power, low voltage electronics are optimized for use in mobile phones, PDAs, GPS devices and outdoor equipment. With an altitude noise down to 0.03 hPa (0.25 m) it offers superior performance in a measurement range from 300 to 1100 hPa (+9000 to -500 m).

For detailed information please refer to the SMB365 and SMD500 related data sheets.

Rev. 1.0

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