Micro Vibration Sensor

Micro Vibration Sensor

The micro vibration sensor is used for the detection of slight movements and vibrations by means of a mobile micro sphere. The ball bridges two contacts reducing the resistance between the two external connection pads from several mega ohms (> 30 MOhm) to below 100 Ohms. The sensor is fully passive, requires no signal conditioning, and operates with currents as low as 0.2 μA.
With the aid of tool-specific evaluation electronics, the micro vibration sensor controls the operation of movement-sensitive devices. The micro vibration sensor is utilised for converting
many systems to environmentally friendly devices by implementing wake-up and powerdown logic to conserve battery power and bringing energy consumption to a minimum, pushing the availability of green technology and green electronics into new areas of design and application. The sensor is typically used for applications such as bike computers, remote controls, electronic lock systems, RFiD transponders, GPS tracking systems, wireless sensor networks, illuminated dog`s collars, access control systems, data loggers, bicycle lights, that are only switched on when in motion. 

Specifications

• fully-automatic SMT mountable
• gold-plated ball and contact surfaces
• low operating current, less than 0.2 µA
• R_ON < 100 Ohm
• R_OFF > 30 Mega Ohm
• Response threshold approx. 50 mg
• Temperature range -20°C – +70°C
• Dimensions (l x w x h) 2.85 x 2.45 x 1.7 mm
• Silent ball movement

APPLICATIONS

• Motion detection
• System wake up – low power