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參數(shù)資料
| 型號： | MMA2260D |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | ±1.5g X--Axis Micromachined Accelerometer(±1.5g X感應(yīng)軸微電機(jī)加速計) |
| 中文描述： | ± 1.5克X -軸微機(jī)械加速度計（± 1.5克X感應(yīng)軸微電機(jī)加速計） |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 312K |
| 代理商： | MMA2260D |
4
Motorola Sensor Device Data
MMA2260D
PRINCIPLE OF OPERATION
The Motorola accelerometer is a surface--micromachined
integrated--circuit accelerometer.
The device consists of a surface micromachined capaci-
tive sensing cell (g--cell) and a CMOS signal conditioning
ASIC contained in a single integrated circuit package. The
sensing element is sealed hermetically at the wafer level us-
ing a bulk micromachined “cap’’ wafer.
The g--cell is a mechanical structure formed from semicon-
ductor materials (polysilicon) using semiconductor
processes (masking and etching). It can be modeled as a set
of beams attached to a movable central mass that move be-
tween fixed beams. The movable beams can be deflected
from their rest position by subjecting the system to an accel-
eration (Figure 2).
As the beams attached to the central mass move, the dis-
tance from them to the fixed beams on one side will increase
by the same amount that the distance to the fixed beams on
the other side decreases. The change in distance is a mea-
sure of acceleration.
The g--cell beams form two back--to--back capacitors (Fig-
ure 2). As the central mass moves with acceleration, the dis-
tance between the beams change and each capacitor’s
value will change, (C = NA
ε
/D). Where A is the area of the
facing side of the beam,
ε
is the dielectric constant, D is the
distance between the beams, and N is the number of beams.
The CMOS ASIC uses switched capacitor techniques to
measure the g--cell capacitors and extract the acceleration
data from the difference between the two capacitors. The
ASIC also signal conditions and filters (switched capacitor)
the signal, providing a high level output voltage that is ratio-
metric and proportional to acceleration.
Acceleration
Figure 2. Simplified Transducer Physical Model
SPECIAL FEATURES
Filtering
Motorola accelerometers contain an onboard 2--pole
switched capacitor filter. Because the filter is realized using
switched capacitor techniques, there is no requirement for
external passive components (resistors and capacitors) to
set the cut--off frequency.
Self--Test
The sensor provides a self--test feature that allows the ver-
ification of the mechanical and electrical integrity of the ac-
celerometer at any time before or after installation. A fourth
“plate’’ is used in the g--cell as a self--test plate. When the
user applies a logic high input to the self--test pin, a cali-
brated potential is applied across the self--test plate and
the moveable plate. The resulting electrostatic force
(Fe =
1
/
2
AV
2
/d
2
) causes the center plate to deflect. The re-
sultant deflection is measured by the accelerometer’s control
ASIC and a proportional output voltage results. This proce-
dure assures that both the mechanical (g--cell) and electronic
sections of the accelerometer are functioning.
Status
Motorola accelerometers include fault detection circuitry
and a fault latch. The Status pin is an output from the fault
latch, OR’d with self--test, and is set high whenever the fol-
lowing event occurs:
Parity of the EPROM bits becomes odd in number.
The fault latch can be reset by a rising edge on the self--
test input pin, unless one (or more) of the fault conditions
continues to exist.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MMA2260 | 【1.5g X-Axis Micromachined Accelerometer |
| MMA2300D | Surface Mount Micromachined Accelerometer(表面安裝微電機(jī)加速計) |
| MMA2300 | Surface Mount Micromachined Accelerometer |
| MMA2301 | Surface Mount Micromachined Accelerometer |
| MMA3201D | Surface Mount Micromachined Accelerometer(表面安裝微電機(jī)加速計) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| MMA2260DR2 | 功能描述:IC ACCELEROMETER 16-SOIC RoHS:否 類別:傳感器，轉(zhuǎn)換器 >> 加速計 系列:MMA 標(biāo)準(zhǔn)包裝:1 系列:SCA1000 軸:X，Y 加速范圍:±1.7g 靈敏度:1.2V/g 電源電壓:4.75 V ~ 5.25 V 輸出類型:數(shù)字 帶寬:50±30Hz 接口:SPI 安裝類型:表面貼裝 封裝/外殼:12-SMD 供應(yīng)商設(shè)備封裝:12-SMD 其它名稱:551-1007-1 |
| MMA2260EG | 功能描述:加速計 - 板上安裝 4.75-5.5 VOLT RoHS:否 制造商:Murata 傳感軸:Double 加速:12 g 靈敏度: 封裝 / 箱體: 輸出類型:Analog 數(shù)字輸出 - 位數(shù):11 bit 電源電壓-最大:5.25 V 電源電壓-最小:4.75 V 電源電流:4 mA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C |
| MMA2260EGR2 | 功能描述:加速計 - 板上安裝 AIGEAS LOW G X-LAT RoHS:否 制造商:Murata 傳感軸:Double 加速:12 g 靈敏度: 封裝 / 箱體: 輸出類型:Analog 數(shù)字輸出 - 位數(shù):11 bit 電源電壓-最大:5.25 V 電源電壓-最小:4.75 V 電源電流:4 mA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C |
| MMA2300 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Surface Mount Micromachined Accelerometer |
| MMA23-0051K1 | 功能描述:CONN RACK/PANEL 5POS 5A RoHS:否 類別:連接器，互連式 >> 背板 - 專用 系列:MM22 標(biāo)準(zhǔn)包裝:8 系列:PwrBlade® 連接器用途:- 連接器類型:插座，母插口和片狀插口 連接器類型:葉片形電源 位置數(shù):37 加載位置的數(shù)目:全部 間距:0.100"（2.54mm） 行數(shù):4 列數(shù):- 安裝類型:板邊緣，通孔，直角 端子:焊接 觸點布局，典型:24 信號，13 電源 特點:板鎖，導(dǎo)向引腳 觸點表面涂層:金 觸點涂層厚度:30µin（0.76µm） 顏色:黑 包裝:托盤 額定電流:- 材料可燃性額定值:UL94 V-0 工作溫度:-20°C ~ 105°C 額定電壓:- 其它名稱:51793-151793-1-ND |
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