MXR7999VW Dual-Axis Accelerometer

By MEMSIC Inc.

Dual-Axis Accelerometer with Rationmetric Outputs. Automotive Grade MXR7999VW/(-P) FEATURES Dual axis accelerometer fabricated on a single CMOS IC Monolithic design with mixed mode signal processing Zero-g temperature stability better than ± 150 mg from –40C to 125C Sensitivity temperature compensation better that ± 8% from -40C to 125C +/- 2g dynamic range, 1000mV/g sensitivity 29Hz bandwidth On Demand Self Test >50,000 g shock survival rating 4.75V to 5.25V single supply operation Small surface mount package, 5.5mm x 5.5mm x 2.7mm XZ mounting RoHS compliant AEC-Q100 class 1 GENERAL DESCRIPTION The MXR7999VW is a low cost, dual axis accelerometer built on a standard, submicron CMOS process. It measures acceleration with a full-scale range of -2g to +2g and a sensitivity of 1000mV/g. The MXR7999VW provides a g-proportional rationmetric analog output above/ below the zero-g point at 50% of the supply voltage. The typical noise floor is 3.5 mg. The inherent 3dB roll off of the device is 29Hz providing immunity to and attenuation of higher frequency vibrations present in automotive applications. The MXR7999VW is packaged in a hermetically sealed LCC surface mount package (5.5 mm x 5.5 mm x 2.7 mm height), and the package can be used for XZ sensing, its operation temperature is -40 C to +125 C. It can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity). The design is based on heat convection and requires no solid proof mass. This eliminates stiction, particle, and inherent resonant frequency problems associated with competitive devices and provides shock survivability to greater than 50,000g, leading to significantly lower failure rates and lower loss due to handling during assembly and at customer field application. Due to the standard CMOS structure of the MXR7999VW, additional circuitry can easily be incorporated into custom versions for high volume applications. Contact MEMSIC’s local office for more information. Xout and Y/Zout OUTPUTS Normal Output Range (Guaranteed symmetric clipping) 0.5 4.5 V, Turn-On Time 100 250 ms, Resistance 100 ohm POWER SUPPLY Operating Voltage Range 4.75 5.00 5.25 V, Supply Current 3.5 6.0 mA, Power Down Current 5 10 A TEMPERATURE RANGE Operating Range -40 +125 C WEIGHT 197.30 mg ORDERING GUIDE MXR7999VW Vertical mount tape reel MXR7999VW-P Flat mount tape reel Parts are shipped in tape and reel packaging.