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參數(shù)資料
| 型號(hào)： | ADXL204 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
| 中文描述： | Precisionc -1.7克Single-/Dual-Axis i MEMS加速度 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大小： | 486K |
| 代理商： | ADXL204 |
ADXL204
Peak-to-peak noise values give the best estimate of the uncertainty
in a single measurement and is estimated by 6 × rms. Table 8
gives the typical noise output of the ADXL204 for various C
X
and C
Y
values.
Table 8. Filter Capacitor Selection (C
X
, C
Y
)
C
X
, C
Y
(μF)
(m
g
)
10
0.47
0.7
50
0.1
1.5
100
0.047
2.2
500
0.01
4.8
USING THE ADXL204 WITH OPERATING VOLTAGES
OTHER THAN 3.3 V
The ADXL204 is tested and specified at V
S
= 3.3 V; however, it
can be powered with V
S
as low as 3 V or as high as 6 V. Some
performance parameters change as the supply voltage is varied.
Rev. A | Page 11 of 12
Bandwidth(Hz)
RMS Noise
Peak-to-Peak Noise
Estimate (m
g
)
4.1
9.1
12.9
28.8
The ADXL204 output is ratiometric, so the output sensitivity, or
scale factor, varies proportionally to supply voltage. At V
S
= 3 V,
the output sensitivity is typically 560 mV/
g
. At V
S
= 5 V, the
output sensitivity is typically 1000 mV/
g
.
The zero
g
bias output is also ratiometric, so the zero
g
output is
nominally equal to V
S
/2 at all supply voltages.
The output noise is not ratiometric but is absolute in volts;
therefore, the noise density decreases as the supply voltage
increases. This is because the scale factor (mV/
g
) increases
while the noise voltage remains constant. At V
S
= 3 V, the noise
density is typically 190 μ
g
/√Hz. At V
S
= 5 V, the noise density is
typically 110 μ
g
/√Hz.
Self-test response in
g
is roughly proportional to the square of
the supply voltage. However, when ratiometricity of sensitivity
is factored in with supply voltage, self-test response in volts is
roughly proportional to the cube of the supply voltage. This
means at V
S
= 3 V, the self-test response is approximately
equivalent to 150 mV, or equivalent to 270 m
g
(typical). At
V
S
= 5 V, the self-test response is approximately equivalent to
750 mV, or equivalent to 750 m
g
(typical).
The supply current decreases as the supply voltage decreases.
Typical current consumption at V
DD
= 5 V is 750 μA.
USING THE ADXL204 AS A DUAL-AXIS TILT SENSOR
One of the most popular applications of the ADXL204 is tilt
measurement. An accelerometer uses the force of gravity as an
input vector to determine the orientation of an object in space.
An accelerometer is most sensitive to tilt when its sensitive
axis is perpendicular to the force of gravity, that is, parallel to
the earth’s surface. At this orientation, its sensitivity to changes
in tilt is highest. When the accelerometer is oriented on axis to
gravity, that is, near its +1
g
or –1
g
reading, the change in
output acceleration per degree of tilt is negligible. When the
accelerometer is perpendicular to gravity, its output changes
nearly 17.5 m
g
per degree of tilt. At 45°, its output changes
at only 12.2 m
g
per degree and resolution declines.
Dual-Axis Tilt Sensor: Converting Acceleration to Tilt
When the accelerometer is oriented, so both its x-axis and
y-axis are parallel to the earth’s surface, it can be used as a 2-axis
tilt sensor with a roll axis and a pitch axis. Once the output
signal from the accelerometer is converted to an acceleration
that varies between –1
g
and +1
g
, the output
tilt in degrees is calculated as:
PITCH
=
ASIN
(
A
X
/1
g
)
ROLL
=
ASIN
(
A
Y
/1
g
)
Be sure to account for overranges. It is possible for the
accelerometers to output a signal greater than ±1
g
due to
vibration, shock, or other accelerations.
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|---|---|
| ADXL204CE | Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
| ADXL204CE-REEL | Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
| ADXL204EB | Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADXL204CE | 制造商:Analog Devices 功能描述:Accelerometer Dual ±1.7g 3.3V/5V 595mV/g to 645mV/g 8-Pin CLLCC 制造商:Analog Devices 功能描述:ACCELEROMETER DUAL 1.7G 3V TO 6V 595MV/G TO 645MV/G 8PIN LC - Rail/Tube 制造商:Analog Devices 功能描述:IC,PRECISION 1.7 G SINGLE-/DUAL-AXIS ACCELEROMETER, CQCC8 制造商:Analog Devices 功能描述:Accelerometer Dual1.7g 3.3V/5V 645mV/g |
| ADXL204CE-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
| ADXL204EB | 功能描述:BOARD EVAL FOR ADXL204CE RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 傳感器 系列:iMEMS® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| ADXL205XCE | 功能描述:ACCELEROMETER CLCC 制造商:analog devices inc. 系列:iMEMS? 零件狀態(tài):停產(chǎn) 類型:模擬 軸:X，Y 加速度范圍:±18g 靈敏度（LSB/g）:- 靈敏度（mV/g）:100 帶寬:0.5Hz ~ 10kHz 輸出類型:模擬電壓 電壓 - 電源:3 V ~ 6 V 特性:可調(diào)帶寬 工作溫度:-40°C ~ 125°C（TA） 安裝類型:表面貼裝 標(biāo)準(zhǔn)包裝:95 |
| ADXL205XCE-RL | 功能描述:ACCELEROMETER CLCC 制造商:analog devices inc. 系列:iMEMS? 零件狀態(tài):停產(chǎn) 類型:模擬 軸:X，Y 加速度范圍:±18g 靈敏度（LSB/g）:- 靈敏度（mV/g）:100 帶寬:0.5Hz ~ 10kHz 輸出類型:模擬電壓 電壓 - 電源:3 V ~ 6 V 特性:可調(diào)帶寬 工作溫度:-40°C ~ 125°C（TA） 安裝類型:表面貼裝 標(biāo)準(zhǔn)包裝:3,000 |
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