MXA2500EL Datasheet, PDF (1/9 Pages) List of Unclassifed Manufacturers – Ultra Low Noise, Offset Drift 1 g Dual Axis Accelerometer with Analog Outputs

Ultra Low Noise, Offset Drift ±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
17 Hz bandwidth expandable to >160 Hz
3V 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 MXA2500E 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 MXA2500E
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 ±0.5g to ±250g
with custom versions available above ±10 g.) It can
measure both dynamic acceleration (e.g., vibration) and
static acceleration (e.g., gravity). The MXA2500E 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.
MXA2500E
Sck
(optional)
Internal
Oscillator
Temperature
Sensor
CLK
Heater
Control
Voltage
Reference
Continous
Self Test
X axis
Low Pass
Filter
Factory Adjust
Offset & Gain
2-AXIS
SENSOR
Y axis
V_DD
Gnd
Low Pass
Filter
V_DA
T_OUT
V_REF
A_OUTX
A_OUTY
MXA2500E FUNCTIONAL BLOCK DIAGRAM
The MXA2500E 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 17 Hz but is expandable to
>160 Hz (ref. Application Note AN-00MX-003). The
MXA2500E 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 MXA2500E,
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: [phone]
Fax: [phone]
www.memsic.com
MEMSIC MXA2500E Rev C
Page 1 of 9
29/7/2003