Thermal MEMS Accelerometers


  • Overview
  • Specifications
  • Features and Benefits
  • Applications

The MEMSIC Digital Thermal Orientation Sensor (DTOS) is the world's first fully-integrated orientation sensor. Its operation is based on our patented MEMS-thermal technology and is built using a standard 0.18um CMOS process. This sensor contains no moving parts (such as a ball) and thus eliminates field-reliability and repeatability issues associated with competitive products. It also eliminates the "click" sounds typically heard in ball based orientation sensors. Shock survival is greater than 50,000g. This sensor detects four orientation positions, shake and shake direction. In addition, it provides X/Y axis acceleration signals with very low 0g offset.  An I2C interface is used to communicate with this device and an interrupt pin (INT) is provided for shake and orientation. The device also has a power down enabled through the I2C interface.


Axes 2(XY)
Range 2
Output I²C
Sens'ty 64 c/g
Offset Drift 0.3
BW 10
Noise 0.6
Supply Voltage 2.5 - 5.5
Sleep Mode Y
Size 3 x 3
Temp Comp On
Price (1k) Call
  • Fully Integrated Thermal Accelerometer
  • No Detectable Sensor Resonance
  • I2C Interface
  • Absolute 0G offset less than +/- 50mg
    • 4-position Orientation Detection
  • Shake Detection with Interrupt
  • Programmable Shake Threshold
  • Shake Direction Detection
  • Power Down Mode
  • Shock Survival Greater than 50,000 g
  • Operating Supply Voltage from 2.5V to 5.5V
  • Produces no Mechanical Sounds ("click")

Display Orientation

  • Cell Phones
  • Digital cameras
  • LCD TV
  • Personal Media Players

Inclination Sensing (~1 degree resolution)

  • Digital cameras
  • Projectors
  • Digital Video cameras
  • Toys


Tip-Over Detection (Safety)

  • Portable heaters
  • Motorcycles
  • Halogen Lamps
  • Cooling Fans