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PDF MXD202 Data sheet ( Hoja de datos )
| Número de pieza | MXD202 | |
| Descripción | Dual Axis Accelerometer | |
| Fabricantes | Memsic | |
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Data Sheet
MXD202 (DIGITAL)
MXD202
Page 1 of 8
Low Cost, 2.0g, Dual Axis Accelerometer
with Digital Outputs
General Description
The MXD202 is a very low cost dual-axis acceleration sensor on a monolithic IC. With no moving parts,
the device is extremely reliable and is manufactured on a submicron CMOS process enabling small
geometries and small die size, resulting in low overall cost and high functionality. The MXD202 is pri-
marily designed for applications requiring high performance and where overall system cost is a driving
factor in component selection. The MXD202 measures acceleration with a full-scale range of up to ±
2.0g and produces a PWM digital signal output. Sensor is shipped with a duty cycle period of 10 milli-
Seconds (100 Hz). Special order sensors are available with a duty cycle period of 2.5 milli-Seconds
(400 Hz). Typical noise floor is .01% Duty Cycle√Hz, allowing signals below 1.0 milli-g to be resolved.
Frequency response extends to 40 Hz. The frequency response can be extended to 160 Hz with the
implementation of a simple external circuit.
The MXD202 is a dc accelerometer with the capability to measure both ac acceleration, (typ-
ical of vibration) or dc accelerations, (such as inertial force or constant, gravity-induced accelerations).
The MXD202 offers digital output signals which duty cycles (ratio of pulse width to period)
are proportional to the acceleration in each of the axes of sensitivity. The outputs can be measured
directly with a microprocessor counter, eliminating the need for A/D converter or glue logic. The output
duty cycle is programmable over a wide range of sensitivity. MXD202 offers a calibrated temperature
sensor output with a positive temperature coefficient of 5.0 mV/°C. This device can be temperature
compensated easily. The change in sensitivity over the temperature range –40°C to 125°C is pre-
dictable and follows the physical gas laws. The following equation can be used to predict the sensitivi-
ty at any given temperature: SIN X (TIN)2.67 = SFIN X (TFIN)2.67 (Temperature in °K) See Application Note
(AN-00MX-001).
The MXD202 is available in a metal can (TO-100) or a surface mount (LCC); both are her-
metic and are specified over the temperature range -40°C to 125°C.
Features
• Dual axis acceleration outputs
• Digital outputs
• 1.0 mg Resolution in 1Hz bandwidth
• 40 Hz Bandwidth expandable to 160 Hz
• Quiescent Supply Voltage: 3.5 mA
• 0g output 50% duty cycle
• 50,000g shock survival
• 2.70V to 5.25V Single Supply
• On-chip mixed signal processing
• Continuous sensors self test
• Temperature sensor output (Tout) 5mV/°K
• Packaged in 8 pin LCC SMD or
10 pin TO-100 THRU-HOLE
• Hermetically sealed packaging
• Reference voltage (VREF) 2.50V
Applications
• Automotive - Vehicle Security/Active Suspension/ABS/HED Angle Control
• Security - Gas Line/Elevator/Fatigue Sensing
• Office Automation Equipment - Computer Peripherals/Disk Drives/PDA’s/Mouse
Smart Pens/Cell Phones/Printer Head Acceleration Sensor
• Gaming - Joystick/RF Interface/Menu Selection
• White Goods - Spin Control/Cooktop Vibration
Block Diagram of MX20XX
Information furnished by MEMSIC is believed to be
accurate and reliable. However, no responsibility is
assumed by MEMSIC for its use, nor for any infringe-
ments of patents or other rights of third parties which
may result from its use. No license is granted by
implications or otherwise under any patent or patent
rights of MEMSIC.
Technical information.
Subject to change without notice.
MXD202 DIGITAL Data Sheet K 8/1/01
®MEMSIC, Inc. 2000.
100 Burtt Road, Andover, MA 01810
Tel: 978.623.8188 • Fax: 978.623.9945
www.memsic.com
1 page  
Data Sheet
MXD202
Page 5 of 8
Pin Definition
VDD - This is the digital power supply input for the MX20XX. The DC voltage should be between 2.70 and
5.25 volts.
VDA - This is the analog power supply input for the MX20XX. VDA should always be connected to VDD.
GND - This is the ground pin for the MX20XX.
AOUTX - This pin is the output of the x-acceleration sensor.
AOUTY - This pin is the output of the y-acceleration sensor.
TOUT - This pin is the buffered output of the temperature sensor. The voltage at TOUT is an indication of the
die temperature. This voltage can be measured and used to compensate out the temperature dependence of
accelerometer sensitivity.
SCK - Standard product is delivered with an Internal Clock option. Ground this pin when operating with the
Internal Clock. The External Clock must be ordered special from the factory.
VREF - A reference voltage is output from this pin.
MXD202 DIGITAL Data Sheet K 8/1/01
®MEMSIC, Inc. 2000.
100 Burtt Road, Andover, MA 01810
Tel: 978.623.8188 • Fax: 978.623.9945
www.memsic.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MXD202.PDF ] | |
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