MEMSIC MXD7202GL/HL/ML/NL
Page 1 of 10
2003.08.04
APPLICATIONS
Low Cost, Low Noise
±2 g Dual Axis
Accelerometer with Digital Outputs
MXD7202GL/HL/ML/NL
FEATURES
Low cost
Resolution better than 1 milli-g
Dual axis accelerometer fabricated on a monolithic
CMOS IC
On chip mixed signal processing
No moving parts; No loose particle issues
>50,000 g shock survival rating
5mm X 5mm X 2mm LCC package
2.7V to 5.25V single supply continuous operation
Compensated for Sensitivity over temperature
Ultra low initial Zero-g Offset
No adjustment needed outside
Security – Gas Line/Elevator/Fatigue Sensing
Information Appliances – Computer
Peripherals/PDA’s/Mouse Smart Pens/Cell Phones
MXD7202GL/HL/ML/NL FUNCTIONAL BLOCK DIAGRAM
Gaming – Joystick/RF Interface/Menu Selection/Tilt
Sensing
GPS
– electronic Compass tilt Correction
Consumer – LCD projectors, pedometers, blood pressure
Monitor, digital cameras
GENERAL DESCRIPTION
The MXD7202GL/HL/ML/NL is a low cost, dual axis
accelerometer fabricated on a standard, submicron CMOS
process. It is a complete sensing system with on-chip mixed
signal processing. The MXD7202GL/HL/ML/NL measures
acceleration with a full-scale range of
±2 g and a sensitivity
of 12.5%/g @5V. It can measure both dynamic acceleration
(e.g. vibration) and static acceleration (e.g. gravity). The
MXD7202GL/HL/ML/NL 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 greater than
50,000 g, leading to significantly lower failure rate and lower
loss due to handling during assembly and at customer field
application.
The MXD7202GL/HL/ML/NL provides two digital outputs
that are set to 50% duty cycle at zero g acceleration. The
outputs are digital with duty cycles (ratio of pulse width to
period) that are proportional to acceleration. The duty cycle
outputs can be directly interfaced to a microprocessor.
The typical noise floor is 0.3 mg/ Hz allowing signals
below 1 milli-g to be resolved at 1 Hz bandwidth. The
MXD7202GL/HL/ML/NL is packaged in a hermetically
sealed LCC surface mount package (5 mm x 5 mm x 2 mm
height) and is operational over a 0°C to 70°C(GL/HL) or a -
40
°C to +85°C(ML/NL) 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 St., Suite 202, North Andover, MA 01845
Tel: 978.738.0900
Fax: 978.738.0196
www.memsic.co
