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MXA2500U fiches techniques PDF

Memsic - Dual Axis Accelerometer

Numéro de référence MXA2500U
Description Dual Axis Accelerometer
Fabricant Memsic 
Logo Memsic 





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MXA2500U fiche technique
Ultra Low Noise, ±1 g Dual Axis
Accelerometer with Analog Outputs
FEATURES
Better than 1 milli-g resolution
Dual axis accelerometer fabricated on a monolithic
CMOS IC
On-chip mixed mode signal processing
No moving parts
50,000 g shock survival rating
25 Hz bandwidth expandable to >160 Hz
2.70V to 5.25V single supply continuous operation
Small (5mm x 5mm x 2mm) surface mount package
Continuous self test
Custom programmable specifications
Independent axis programmability (special order)
APPLICATIONS
Automotive – Vehicle Security/Active Suspension/ABS
Headlight Angle Control/Tilt Sensing
Security – Gas Line/Elevator/Fatigue Sensing
Office Equipment – Computer Peripherals/PDA’s/Mouse
Smart Pens/Cell Phones
Gaming – Joystick/RF Interface/Menu Selection/Tilt Sensing
White Goods – Spin/Vibration Control
GENERAL DESCRIPTION
The MXA2500U is an ultra low noise and 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 MXA2500U
measures acceleration with a full-scale range of ±1 g and a
sensitivity of 500mV/g at 25°C. (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 MXA2500U 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 rates and
lower loss due to handling during assembly.
MXA2500U
Sck
(optional)
Internal
Oscillator
Temperature
Sensor
Voltage
CLK Reference
Heater
Control
Continous
Self Test
X axis
Low Pass
Filter
Factory Adjust
Offset & Gain
2-AXIS
SENSOR
Y axis
VDD Gnd
Low Pass
Filter
VDA
TOUT
VREF
AOUTX
AOUTY
MXA2500U FUNCTIONAL BLOCK DIAGRAM
The MXA2500U provides an absolute analog output The
typical noise floor is 0.2 mg/ Hz allowing signals below
1 milli-g to be resolved at 1 Hz bandwidth. The 3dB
rolloff of the device occurs at 25 Hz but is expandable to
>160 Hz (ref. Application Note AN-00MX-003). The
MXA2500U is available in a low profile LCC surface
mount package (5 mm x 5 mm x 2 mm). It is hermetically
sealed and is operational over a -40°C to +105°C
temperature range. It also contains an on-chip temperature
sensor and a bandgap voltage reference.
Due to the standard CMOS structure of the MXA2500U,
additional circuitry can easily be incorporated into custom
versions for high volume applications. Contact the factory
for more information.
Information furnished by MEMSIC is believed to be accurate and reliable.
However, no responsibility is assumed by MEMSIC for its use, nor for any
infringements of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or
patent rights of MEMSIC.
MEMSIC, Inc.
800 Turnpike Street, Suite 202 , North Andover, MA 01845
Tel: 978.738.0900
Fax: 978.738.0196
www.memsic.com
MEMSIC MXA2500U Rev A
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