MXA2500G/M

Low Cost, +/-1.7g Dual Axis Accelerometer with Absolute Outputs

Features

Resolution better than 1 milli-g
Dual axis accelerometer fabricated on a monolithic CMOS IC
On chip mixed mode signal processing
No moving parts
50,000 g shock survival rating
17 Hz bandwidth expandable to >160 Hz
3.0V to 5.25V single supply continuous operation
Continuous self test
Independent axis programmability (special order)
Internal Sensitivity Compensated

Application

• Automotive
  Vehicle Security/Active Suspension/ABS/Headlight Angle Control/Tilt Sensing
  
• Security
  Gas Line/Elevator/Fatigue Sensing
  
• Information Appliances
  Computer Peripherals/PDA's/Mouse/Smart Pens/Cell Phones
  
• Gaming
  Joystick/RF Interface/Menu Selection/Tilt Sensing
  
• Consumer
  LCD projectors, pedometers, blood pressure Monitor, digital cameras

General Description

The MXA2500G/M is a low cost, dual axis accelerometer fabricated on a standard, submicron CMOS process. It is a complete sensing system with on-chip mixed mode signal processing. The MXA2500G/M measures acceleration with a full-scale range of +/-1.7g and a sensitivity of 500mV/g @5V at 25°. It can measure both dynamic acceleration (e.g. vibration) and static acceleration (e.g. gravity). The MXA2500G/M design is based on heat convection and requires no solid proof mass. This eliminates stiction and particle problems associated with competitive devices and provides shock survival of 50,000 g, leading to significantly lower failure rate and lower loss due to handling during assembly.

The MXA2500G/M provides two absolute analog outputs. The typical noise floor is 0.2 mg/ allowing signals below 1 milli-g to be resolved at 1 Hz bandwidth. The 3dB rolloff of the device occurs at 17 Hz but is expandable to >160 Hz (reference Application Note AN-00MX-003). The MXA2500G/M is packaged in a hermetically sealed LCC surface mount package (5 mm x 5 mm x 2 mm height) and is operational over a -40° to 105°(M) and 0° to 70° (G) temperature range.