Digital Cameras

Display Orientation, Horizon Leveling, and e-Compass

Today's digital cameras have more sensors than ever. Accelerometers are used to sense portrait/landscape orientation, and to detect the attitude of the camera in both roll and pitch axes. Gyroscopes are used for image stabilization, and magnetic sensors and GPS can be included for precise documentation of the location and bearing of the photographer.

MEMSIC thermal accelerometers are ideally suited for camera applications for the following reasons:

  • No mechanical resonance means excellent vibration immunity
  • Shock tolerant to 50,000g, and no stiction issues
  • Ultra-low 0g offset drift, for high precision horizon-sensing
  • Some models offer built-in 45° angle threshold for display orientation

 

For the lowest possible cost in high volume camera models, see the MXC6226XU and MXC6226XC, which offer (in addition to the above benefits):

  • Built-in 45° angle threshold, with interrupt output, to alert processor to a change in orientation
  • Programmable hysteresis delay prevents "chattering" near the threshold
  • +/-2g FSR, with 17mg/LSB resolution
  • 0g offset drift of 0.3mg/°C (MXC6226XU, typical)
  • Ultra-small package size of 1.2 x 1.7 x 1.0 mm (MXC6226XC)

 

For even higher performance, the MXC6235xQB offers:

  • +/-1.5g FSR, with 2mg/LSB resolution
  • 0g offset drit of 0.1mg/°C (typical), 0.5mg/°C (max)

 

For implementation of electronic compassing function, view MEMSIC's portfolio of 2- and 3-axis magnetic sensors, which offer outstanding noise, power consumption, and heading accuracy.

 

Digital Cameras