MXA2312A Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – Low Cost, +2,-2 g Dual Axis Accelerometer with Analog Outputs

Low Cost, ±2 g Dual Axis
Accelerometer with Analog Outputs
FEATURES
Dual axis accelerometer fabricated on a monolithic CMOS IC
On-chip mixed mode signal processing
Resolution better than 2 milli-g
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)
APPLICATIONS
Automotive – Vehicle Security/Active Suspension/ABS
HED 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
MXA2312A
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
Aout X
Aout Y
MXA2312A FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTION
The MXA2312A is a very low cost, dual axis accelerometer
fabricated on a standard, submicron CMOS process. The
MXA2312A measures acceleration with a full-scale range
of ±2 g and a sensitivity of 312mV/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 MXA2312A 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 MXA2312A provides an absolute analog output (ref.
other MEMSIC data sheets for ratiometric, analog or digital
outputs). The typical noise floor is 0.75 mg/ Hz allowing
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.
signals below 2 milli-g to be resolved at 1 Hz bandwidth.
The 3dB rolloff of the device occurs at 30 Hz but is
expandable to >160 Hz (refernce Application Note AN-
00MX-003). The MXA2312A is available in a low profile
LCC surface mount package (5mm x 5mm x 2mm height).
It is hermetically sealed and are operational over a -40°C to
+105°C temperature range.
Due to the standard CMOS structure of the MXA2312A,
additional circuitry can easily be incorporated into custom
versions for high volume applications. Contact the factory
for more information.
MEMSIC, Inc.
100 Burtt Road, Andover, MA 01810
Tel: [phone]
Fax: [phone]
www.memsic.com