Thermal MEMS Accelerometers


  • Overview
  • Specifications
  • Features and Benefits
  • Applications

World’s Smallest Digital Accelerometer

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 accceleration 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 0.6
BW 10
Noise 0.9
Supply Voltage 2.5 - 5.5
Sleep Mode Y
Size 1.2 x 1.7
Temp Comp On
Price (1k) Call
  • Fully Integrated Thermal Accelerometer
  • X/Y Axis, 8 bit, Acceleration A/D Output (± 2g)
  • Absolute 0G offset less than +/- 50mg
  • 4-position Orientation Detection
  • Shake Detection with Interrupt
  • Programmable Shake Threshold
  • Shake Direction Detection
  • I2C Interface
  • Power Down Mode
  • Shock Survival Greater than 50,000 g
  • Operating Supply Voltage from 2.5V to 5.5V (1.8V I/O)
  • Produces no Mechanical Sounds ("click")
  • Package Size 1.18 x 1.7 x 0.965mm

Display Orientation

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

Inclination Sensing (~1 degree resolution)

  • Digital cameras
  • Projectors
  • Digital Video cameras

Tip-Over Detection (Safety)

  • Portable heaters
  • Motorcycles
  • Halogen Lamps
  • Cooling Fans