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參數(shù)資料
| 型號(hào)： | MXD2020HL |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Improved, Ultra Low Noise Dual Axis Accelerometer with Digital Outputs |
| 中文描述： | 改進(jìn)的，超低噪音雙軸加速度計(jì)的數(shù)字輸出 |
| 文件頁(yè)數(shù)： | 4/7頁(yè) |
| 文件大小： | 289K |
| 代理商： | MXD2020HL |
MXD2020GL/HL/ML/NL PIN DESCRIPTIONS
V
DD
– This is the supply input for the digital circuits and
the sensor heater in the
accelerometer
. The DC voltage
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
DA
– This is the power supply input for the analog
amplifiers in the
accelerometer
. V
DA
should always be
connected to V
DD
. 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
.
D
OUTX
– This pin is the digital output of the x-axis
acceleration sensor. It is factory programmable to 100 Hz
or 400 Hz. The user should ensure the load impedance is
sufficiently high as to not source/sink >100
μ
A typical.
While the sensitivity of this axis has been programmed at
the factory to be the same as the sensitivity for the y-axis,
the
accelerometer
can be programmed for non-equal
sensitivities on the x- and y-axes. Contact the factory for
additional information.
D
OUTY
–
This pin is the digital output of the y-axis
acceleration sensor. It is factory programmable to 100 Hz
or 400 Hz. The user should ensure the load impedance is
sufficiently high as to not source/sink >100
μ
A typical.
While the sensitivity of this axis has been programmed at
the factory to be the same as the sensitivity for the x-axis,
the
accelerometer
can be programmed for non-equal
sensitivities on the x- and y-axes. Contact the factory for
additional information.
T
OUT
– This pin is the buffered output of the temperature
sensor. The analog voltage at T
OUT
is an indication of the
die temperature. This voltage is useful as a differential
measurement of temperature from ambient and not as an
absolute measurement of temperature.
Sck
– The standard product is delivered with an internal
clock option (800kHz).
This pin should be grounded
when operating with the internal clock.
An external
clock option can be special ordered from the factory
allowing the user to input a clock signal between 400kHz
And 1.6MHz
V
ref
– A reference voltage is available from this pin. It is
set at 2.50V typical and has 100
μ
A of drive capability.
MEMSIC MXD2020GL/ML/NL/HL
Page 4 of 7
2002.08.29.1
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.
Table 1 and Figure 2 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).
X
Top View
Y
+90
0
0
0
gravity
M
E
M
S
IC
Figure 2: 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
Table 1: 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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MXD2020ML | Improved, Ultra Low Noise Dual Axis Accelerometer with Digital Outputs |
| MXD2020NL | Improved, Ultra Low Noise Dual Axis Accelerometer with Digital Outputs |
| MXD2020G | Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
| MXD2020H | Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
| MXD2020M | Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MXD2020M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
| MXD2020ML | 制造商:MEMSIC 功能描述:ACCELEROMETER 2 AXIS ?.7G LCC8 制造商:MEMSIC 功能描述:ACCELEROMETER, 2 AXIS, 1.7G, LCC8 制造商:MEMSIC 功能描述:ACCELEROMETER, 2 AXIS, 1.7G, LCC8; MEMS Sensor Output:PWM; Measurement Axis:X, Y; Acceleration Range: 1.7g; Supply Voltage Min:3V; Supply Voltage Max:5.25V; Sensor Case Style:LCC; No. of Pins:8; Sensitivity Min:19%/g; Sensitivity ;RoHS Compliant: Yes |
| MXD2020N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Improved, Ultra Low Noise 【1.7 g Dual Axis Accelerometer with Digital Outputs |
| MXD2020NL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Improved, Ultra Low Noise Dual Axis Accelerometer with Digital Outputs |
| MXD202AC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low Cost, 2.0g, Dual Axis Accelerometer with Digital Outputs |
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