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參數(shù)資料
| 型號： | MXC6202N |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low Power, Low Profile 【2 g Dual Axis Accelerometer with I2C Interface |
| 中文描述： | 低功耗，低簡介【2克雙軸加速度計I2C接口 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 313K |
| 代理商： | MXC6202N |
THEORY OF OPERATION
The MEMSIC device is a complete dual-axis acceleration
measurement system fabricated on a monolithic CMOS IC
process. The device operation is based on heat transfer by
natural convection and operates like other accelerometers
except that the proof mass in the MEMSIC sensor is a gas.
A single heat source, centered in the silicon chip is
suspended across a cavity. Equally spaced
aluminum/polysilicon thermopiles (groups of
thermocouples) are located equidistantly on all four sides of
the heat source (dual axis). Under zero acceleration, a
temperature gradient is symmetrical about the heat source,
so that the temperature is the same at all four thermopiles,
causing them to output the same voltage.
MEMSIC MXC6202G/H/M/N
Rev.B
Page 7 of
10
11
/10/2005
Acceleration in any direction will disturb the temperature
profile, due to free convection heat transfer, causing it to be
asymmetrical. The temperature, and hence voltage output
of the four thermopiles will then be different. The
differential voltage at the thermopile outputs is directly
proportional to the acceleration. There are two identical
acceleration signal paths on the accelerometer, one to
measure acceleration in the x-axis and one to measure
acceleration in the y-axis. Please visit the MEMSIC
website at www.memsic.com for a picture/graphic
description of the free convection heat transfer principle.
MXC6202G/H/M/N PIN DESCRIPTIONS
V
DD
– This is the supply input for the circuits and the
sensor heater in the
accelerometer
. The DC voltage should
be between 2.7 and 3.6 volts. Refer to the section on PCB
layout and fabrication suggestions for guidance on external
parts and connections recommended.
GND
– This is the ground pin for the
accelerometer
.
COM
– This pin should be connected to ground.
TEST
– Do Not Connect, factory use only.
VDD2
– This pin is the I
2
C input digital power supply, the
voltage on this pin determines the I
2
C bus logic voltage,
and is 1.8V compatible. Note: The voltage on this pin
should never go higher than the voltage on V
DD
, if VDD2
has a lower power supply voltage than V
DD
, power should
be applied to V
DD
first.
SDA
– This pin is the I
2
C serial data line, and operates in
FAST (400 KHz.) mode.
SCL
– This pin is the I
2
C serial clock line, and operates in
FAST (400 KHz.) mode.
DISCUSSION OF TILT APPLICATIONS AND
RESOLUTION
Tilt Applications:
One of the most popular applications of
the MEMSIC accelerometer product line is in
tilt/inclination measurement. An accelerometer uses the
force of gravity as an input to determine the inclination
angle of an object.
A MEMSIC accelerometer is most sensitive to changes in
position, or tilt, when the accelerometer’s sensitive axis is
perpendicular to the force of gravity, or parallel to the
Earth’s surface. Similarly, when the accelerometer’s axis is
parallel to the force of gravity (perpendicular to the Earth’s
surface), it is least sensitive to changes in tilt.
Following table and figure help illustrate the output
changes in the X- and Y-axes as the unit is tilted from +90
°
to 0
°
. Notice that when one axis has a small change in
output per degree of tilt (in m
g
), the second axis has a large
change in output per degree of tilt. The complementary
nature of these two signals permits low cost accurate tilt
sensing to be achieved with the MEMSIC device (reference
application note AN-00MX-007).
M
Accelerometer Position Relative to Gravity
X-Axis
X-Axis
Orientatio
n
To Earth’s
Surface
(deg.)
90
1.000
85
0.996
80
0.985
70
0.940
60
0.866
45
0.707
30
0.500
20
0.342
10
0.174
5
0.087
0
0.000
Changes in Tilt for X- and Y-Axes
Y-Axis
X Output
(
g
)
Change
per deg.
of tilt
(m
g
)
Y Output
(
g
)
Change
per deg.
of tilt
(m
g
)
12.23
15.04
16.35
17.16
17.37
17.45
0.15
1.37
2.88
5.86
8.59
0.000
0.087
0.174
0.342
0.500
0.707
0.866
0.940
0.985
0.996
1.000
17.45
17.37
17.16
16.35
15.04
12.23
8.59
5.86
2.88
1.37
0.15
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| MXC6202XJ | Ultra Low Cost, 【2.0 g Dual Axis Accelerometer With I2C Interface |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MXC6202XJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Ultra Low Cost, ±2.0 g Dual Axis Accelerometer With I2C Interface |
| MXC6202XK | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Ultra Low Cost, ±2.0 g Dual Axis Accelerometer With I2C Interface |
| MXC6225XC (DTOS WLP) | 制造商:MEMSIC INC 功能描述:IC ACCELEROMETER XY AXIS 6CSP |
| MXC6225XU DTOS | 制造商:MEMSIC INC 功能描述:IC ACCELEROMETER XY AXIS LCC6 |
| MXC6226XC (DTOS WLP) | 功能描述:Accelerometer X, Y Axis ±2g 10Hz 6-CSP 制造商:memsic inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 類型:數(shù)字 軸:X，Y 加速度范圍:±2g 靈敏度（LSB/g）:64 靈敏度（mV/g）:- 帶寬:10Hz 輸出類型:I2C 電壓 - 電源:2.5 V ~ 5.5 V 特性:- 工作溫度:-20°C ~ 70°C（TA） 安裝類型:表面貼裝 封裝/外殼:6-CSP 供應(yīng)商器件封裝:6-CSP 標(biāo)準(zhǔn)包裝:1 |
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