MXD2002B Datasheet | Memsic

FEATURES Sck (optional) Internal O scillator Tem perature Sensor Voltage R eference Tout Dual axis accelerometer fabricated on a monolithic CMOS IC On-chip mixed mode signal processing Resolution better than 6 milli-g 50,000 g shock survival rating 30 Hz bandwidth 2.70V to 5.25V single supply operation Small (5mm x 5mm x 2mm) surface mount package Continuous self test Independently programmable axis (factory special) C LK Vref H eater Control C ontinous Self Test X axis A/D D out X Factory Adjust O ffset & G ain APPLICATIONS Automotive - Vehicle Security/Active Suspension/ABS HED Angle Control/Tilt Sensing Security - Gas Line/Elevator/Fatigue Sensing Office Equipment - puter Peripherals/PDA’s/Mouse Smart Pens/Cell Phones Gaming - Joystick/RF Interface/Menu Selection/Tilt Sensing White Goods - Spin/Vibration Control Y axis A/D D out Y 2-AX IS SENSO R Vdd Gnd Vda MXD2002A/B FUNCTIONAL BLOCK DIAGRAM The MXD2002A/B is a very low cost, dual axis accelerometer fabricated on a standard, submicron CMOS process. The MXD2002A/B measures acceleration with a full-scale range of ±10 g. (The MEMSIC accelerometer product line extends from ±1 g to ±10 g with custom versions available above ±10 g.) It can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity). The MXD2002A/B design is based on heat convection and requires no solid proof mass. This eliminates stiction and particle problems associated with petitive 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 MXD2002A/B provides a digital output (ref. other MEMSIC data sheets for analog or ratiometric analog outputs). The outputs are digital signals with duty cycles (ratio of pulsewidth to period) that are proportional to acceleration. The duty cycle outputs can be directly interfaced to a micro-processor. Information furnished by MEMSIC is believed to be accurate...