MXR2312G Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – Improved, Ultra Low Noise ±2 g Dual Axis Accelerometer with Ratiometric Outputs

Improved, Ultra Low Noise ±2 g
Dual Axis Accelerometer with
Ratiometric Outputs
MXR2312G/M
FEATURES
Resolution better than 1 milli-g
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
3.0V to 5.25V single supply continuous operation
Continuous self test
Independent axis programmability (special order)
Compensated for Sensitivity over temperature
Ultra low initial Zero-g Offset
APPLICATIONS
Automotive – Vehicle Security/Vehicle Stability control/
Headlight Angle Control/Tilt Sensing
Security – Gas Line/Elevator/Fatigue Sensing/Computer Security
Information Appliances – Computer Peripherals/PDA’s/Mouse
Smart Pens/Cell Phones
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 MXR2312G/M is a 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 MXR2312G/M measures acceleration
with a full-scale range of ±2 g and a sensitivity of 312mV/g
@5V at 25°C. It can measure both dynamic acceleration
(e.g. vibration) and static acceleration (e.g. gravity). The
MXR2312G/M 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 rate and lower loss due to
handling during assembly.
Sck
(optional)
Internal
Oscillator
Temperature
Sensor
T_OUT
CLK
Voltage
Reference
V_REF
Heater
Control
Continous
Self Test
X axis
Low Pass
Filter
A_OUTX
Factory Adjust
Offset & Gain
2-AXIS
SENSOR
Y axis
Low Pass
Filter
A_OUTY
V_DD
Gnd
V_DA
MXR2312G/M FUNCTIONAL BLOCK DIAGRAM
The MXR2312G/M provides two ratiometric analog
outputs proportional to 50% of the supply voltage at zero g
acceleration. 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 (reference Application Note
AN-00MX-003). The MXR2312G/M is packaged in a
hermetically sealed LCC surface mount package (5 mm x 5
mm x 2 mm height) and is operational over a -40°C to
105°C(ML) and 0°C to 70°C(GL) 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: [phone]
Fax: [phone]
www.memsic.com
MEMSIC MXR2312G/M Rev.E
Page 1 of 6
1/19/2005