MXA2050A

Low Cost, ±10 g Dual Axis Accelerometer with Analog Outputs

Features

Dual axis accelerometer fabricated on a monolithic CMOS IC
RoHS compliant
On-chip mixed mode signal processing
Resolution better than 2 mg
50,000 g shock survival rating
30 Hz bandwidth expandable to >160 Hz
2.70V to 5.25V single supply operation
Small (5mm x 5mm x 2mm) surface mount package
Continuous self test
Independent axis programmability (special order)

Application

• Automotive –
  Vehicle Security
  Active Suspension
  ABS
  HED Angle Control
  Tilt Sensing
• Security –
  Gas Line
  Elevator
  Fatigue Sensing
• Office Equipment –
  Computer Peripherals
  PDA’s
  Cell Phones
• Gaming –
  Joystick
  RF Interface
  Menu Selection
  Tilt Sensing
• White Goods –
  Spin
  Vibration Control

General Description

The MXA2050A is a low cost, dual axis accelerometer fabricated on a standard, submicron CMOS process. The MXA2050A measures acceleration with a full-scale range of ±10 g and a sensitivity of 50mV/g @5V at 25°C. It can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity). The MXA2050A 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 up to 50,000 g, leading to significantly lower failure rates and lower loss due to handling during assembly.

The MXA2050A provides two absolute analog outputs (ref. other MEMSIC data sheets for ratiometric, analog or digital outputs). The typical noise floor is 0.75 mg/ allowing signals below 2 mg to be resolved at 1 Hz bandwidth. The 3dB rolloff of the device occurs at 30 Hz but is expandable to >160 Hz (reference Application Note AN-00MX-003). The MXA2050A is available in a LCC surface mount package (5mm x 5mm x 2mm). It is hermetically sealed and operational over a -40°C to +105°C temperature range.

Due to the standard CMOS structure of the MXA2050A, additional circuitry can easily be incorporated into custom versions for high volume applications. Contact the factory for more information.