Application Note

Bosch Sensortec

BlueBox Demo-Board for the digital sensors AN18002

SMB365 (acceleration) and SMD500 (pressure)

4.3.4SMB365 Selftest

All operation modes of the SMB365 sensor (2g, 10g, normal power, low-power, global and independent interrupt condition) offer full on-chip selftest capability. The selftest acts on all three axes to check all signal evaluation paths of the MEMS simultaneously. This includes the silicon sensing element as well as the ASIC itself. The selftest is realized by a physical deflection of the seismic mass due to an electrostatic force. In operation, it is possible to perform the selftest at any time over the complete life cycle. For more details please refer to the latest sensor related datasheet.

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rising edge

 

 

 

 

falling edge

 

 

 

 

 

 

 

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Selftest activated

 

 

 

Selftest deactivated

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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