Low Cost, Low Noise
鹵10
g
Dual
Axis Accelerometer with Digital
Outputs
MXD7210GL/HL/ML/NL
FEATURES
Low cost
Resolution better than 1milli-g at 1Hz
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
APPLICATIONS
Computer Peripherals
Information Appliances
Alarms and Motion Detectors
Disk Drives
Vehicle Security
GENERAL DESCRIPTION
The MXD7210GL/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 MXD7210GL/HL/ML/NL measures
acceleration with a full-scale range of
鹵10
g
and a sensitivity
of 4%/g @5V. It can measure both dynamic acceleration
(e.g. vibration) and static acceleration (e.g. gravity). The
MXD7210GL/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.
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.
MXD7210GL/HL/ML/NL FUNCTIONAL BLOCK DIAGRAM
The MXD7210GL/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 0.4 mg/
Hz
allowing signals
below 1milli-g to be resolved at 1 Hz bandwidth.
The
MXR7210GL/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擄C to 70擄C(GL/HL) or
a
-
40擄C to +85擄C(ML/NL) temperature range.
餂橫EMSIC,
Inc.
800 Turnpike St., Suite 202, North Andover, MA 01845
Tel: 978.738.0900
Fax: 978.738.0196
www.memsic.com
MEMSIC MXD7210GL/HL/ML/NL
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