Ultra Low Cost,
±1.0 g Dual Axis Accelerometer
with Absolute Outputs
MXA2500J/K
FEATURES
RoHS Compliant
Dual axis accelerometer
Monolithic CMOS construction
On-chip mixed mode signal processing
Resolution better than 2 mg
30Hz bandwidth
2.70V to 5.25V single supply operation
Low height surface mount package
APPLICATIONS
Consumer Electronics
•
Cell phones, PDAs, MP3 Players, Gaming
consoles
•
Screen and image orientation
•
Tilt and motion input
•
Menu navigation
•
Auto power on/off
•
Active HDD protection
•
Pedometer
Security
•
Tamper detection
•
Catastrophic event detection
•
Black box event recorders
Office Equipment
•
Computer Peripherals
•
Mouse input
GENERAL DESCRIPTION
The MXA2500J/K is an ultra low cost, dual axis
accelerometer fabricated on a standard, submicron
CMOS process. The MXA2500J/K measures
acceleration with a full-scale range of
±1.0 g and a
sensitivity of 500mV/g @3V power supply at 25
°C. It
can measure both dynamic acceleration (e.g.,
vibration) and static acceleration (e.g., gravity).
Internal
Oscillator
Sck
(optional)
CLK
Heater
Control
X axis
Y axis
Factory Adjust
Offset & Gain
Low Pass
Filter
Low Pass
Filter
Temperature
Sensor
Voltage
Reference
Vref
Aout X
Vdd
Vda
Gnd
2-AXIS
SENSOR
Aout Y
Tout
Continous
Self Test
MXA2500J/K FUNCTIONAL BLOCK DIAGRAM
The MXA2500J/K design is based on heat convection
and requires no solid proof mass. This eliminates
stiction and particle problems, leading to significantly
lower failure rates and lower loss due to handling
during assembly.
The MXA2500J/K provides two absolute analog
outputs.
The typical noise floor is 1.0 mg/ Hz allowing signals
below 2mg to be resolved at 1Hz bandwidth. The
MXA2500J/K has an inherent low pass frequency
response with a 30Hz 3dB cutoff frequency, which
eliminates unwanted higher frequency vibrations from
obscuring the measurement. The MXA2500J/K is
available in a LCC surface mount package (5.5mm x
5.5mm x 1.40mm height, with maximum height of
1.50mm). It is operational over a 0
°C to +70°C (J)
and -40
°C to +85°C (K) temperature range.
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 MXA2500J/K Rev.A
Page 1 of 8
2/17/2006
