mxd2020gl ETC-unknow, mxd2020gl Datasheet

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mxd2020gl

Manufacturer Part Number
mxd2020gl
Description
Improved, Ultra Noise Dual Axis Accelerometer With Digital Outputs
Manufacturer
ETC-unknow
Datasheet
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/
Security – Gas Line/Elevator/Fatigue Sensing
Information Appliances – Computer Peripherals/PDA’s/Mouse
Gaming – Joystick/RF Interface/Menu Selection/Tilt Sensing
GPS
Consumer – LCD projectors, pedometers, blood pressure
GENERAL DESCRIPTION
The MXD2020GL/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 mode signal processing. The
MXD2020GL/HL/ML/NL measures acceleration with a
full-scale range of ±1 g and a sensitivity of 20%/g. It can
measure both dynamic acceleration (e.g. vibration) and
static acceleration (e.g. gravity).
The MXD2020GL/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 of 50,000
g, leading to significantly lower failure rate and lower loss
due to handling during assembly.
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 MXD2020GL/ML
Headlight Angle Control/Tilt Sensing
Smart Pens/Cell Phones
electronic Compass tilt Correction
Monitor, digital cameras
Improved, Ultra Low Noise ±1 g
Dual Axis Accelerometer with
Digital Outputs
Page 1 of 7
The MXD2020GL/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 micro-
processor.
The typical noise floor is 0.2 mg/ Hz allowing signals
below 1 milli-g to be resolved at 1 Hz bandwidth. The
MXD2020GL/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 -40
0°C to 70°C(G/HL) temperature range.
MEMSIC, Inc.
800 Turnpike St., Suite 202, North Andover, MA 01845
Tel: 978.738.0900
www.memsic.com
(optional)
Sck
MXD2020GL/HL/ML/NL FUNCTIONAL BLOCK
C LK
SEN SOR
C ontrol
2-AXIS
H eater
MXD2020ML/NL
MXD2020GL/HL
Vdd
Oscillator
Internal
DIAGRAM
Y axis
X axis
Fax: 978.738.0196
Factory Adjust
Offset & Gain
C ontinous
Self Test
G nd
°C
LPF
LPF
Vda
Tem perature
to 105
R eference
Voltage
Sensor
A/D
A/D
2002.08.29.1
°C(M/NL) and
Dout X
Dout Y
Tout
Vref

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mxd2020gl Summary of contents

Page 1

... Compass tilt Correction Consumer – LCD projectors, pedometers, blood pressure Monitor, digital cameras GENERAL DESCRIPTION The MXD2020GL/HL/ML/ low cost, dual axis accelerometer fabricated on a standard, submicron CMOS process complete sensing system with on-chip mixed mode signal processing. The MXD2020GL/HL/ML/NL measures acceleration with a full-scale range of ± ...

Page 2

... For devices to be operated at 3.0V in production, they can be trimmed at the factory specifically for this lower supply voltage operation, in which case the sensitivity and zero g bias MEMSIC MXD2020GL/ML/NL/HL (Measurements @ 25°C, Acceleration = 0 g unless otherwise noted; V MXD2020G/HL ...

Page 3

... Note: The MEMSIC logo’s arrow indicates the +X sensing direction of the device. The +Y sensing direction is rotated 90° away from the +X direction following the right-hand rule. MEMSIC MXD2020GL/ML/NL/HL THEORY OF OPERATION The MEMSIC device is a complete dual-axis acceleration measurement system fabricated on a monolithic CMOS IC process ...

Page 4

... MXD2020GL/HL/ML/NL PIN DESCRIPTIONS V – This is the supply input for the digital circuits and DD the sensor heater in the accelerometer should be between 3.0 and 5.25 volts. Refer to the section on PCB layout and fabrication suggestions for guidance on external parts and connections recommended. V – This is the power supply input for the analog ...

Page 5

... The peak-to-peak noise is approximately equal to 6.6 times the rms value (for an average uncertainty of 0.1%). DIGITAL INTERFACE The MXD2020GL/HL/ML/NL is easily interfaced with low cost microcontrollers. For the digital output accelerometer, one digital input port is required to read one accelerometer output. For the analog output accelerometer, many low cost ...

Page 6

... C2 can be ceramic 0.1 µF, and the resistor R can be 10 Ω applications where power consumption is not a concern, maximum supply noise rejection can be obtained by significantly increasing the values of C1, C2 and R. For example 0.47 µF and R = 270 Ω will virtually eliminate power supply noise effects. MEMSIC MXD2020GL/ML/NL/HL V SUPPLY C1 R VDA VDD ...

Page 7

... MEMSIC MXD2020GL/ML/NL/HL LCC-8 PACKAGE DRAWING Fig 6: Hermetically Sealed Package Outline Page 2002.08.29.1 ...

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