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參數資料
| 型號： | MXD202AC |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low Cost, 2.0g, Dual Axis Accelerometer with Digital Outputs |
| 中文描述： | 低成本，二點○克，雙軸加速度計的數字輸出 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 239K |
| 代理商： | MXD202AC |
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 ±
2.0
g
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:
SINX (TIN)2.67= SFINX (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.
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
General Description
MXD202 (DIGITAL)
Low Cost, 2.0
g
, Dual Axis Accelerometer
with Digital Outputs
Features
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.
MEMSIC, Inc. 2000.
100 Burtt Road, Andover, MA 01810
Tel: 978.623.8188 Fax: 978.623.9945
www.memsic.com
MXD202 DIGITAL Data Sheet K 8/1/01
Page 1 of 8
Data Sheet
MXD202
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
0
g
output 50% duty cycle
50,000
g
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 (V
REF
) 2.50V
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