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參數資料
| 型號： | LIS3L02AS4 |
| 廠商： | 意法半導體 |
| 英文描述： | MEMS INERTIAL SENSOR 3-Axis - 【2g/【6g LINEAR ACCELEROMETER |
| 中文描述： | MEMS慣性傳感器3軸- 【2克/【6克線性加速度計 |
| 文件頁數： | 6/14頁 |
| 文件大?。?/td> | 181K |
| 代理商： | LIS3L02AS4 |
LIS3L02AS4
6/14
4
Functionality
The LIS3L02AS4 is a high performance, low-power, analog output three axes linear accelerometer packaged
in a SO24 package. The complete device includes a sensing element and an IC interface able to take the infor-
mation from the sensing element and to provide an analog signal to the external world.
4.1 Sensing element
A proprietary process is used to create a surface micro-machined accelerometer. The technology allows to carry
out suspended silicon structures which are attached to the substrate in a few points called anchors and are free
to move in the direction of the sensed acceleration. To be compatible with the traditional packaging techniques
a cap is placed on top of the sensing element to avoid blocking the moving parts during the moulding phase of
the plastic encapsulation.
When an acceleration is applied to the sensor the proof mass displaces from its nominal position, causing an
imbalance in the capacitive half-bridge. This imbalance is measured using charge integration in response to a
voltage pulse applied to the sense capacitor.
At steady state the nominal value of the capacitors are few pF and when an acceleration is applied the maximum
variation of the capacitive load is up to 100fF.
4.2 IC Interface
In order to increase robustness and immunity against external disturbances the complete signal processing
chain uses a fully differential structure. The final stage converts the differential signal into a single-ended one to
be compatible with the external world.
The signals of the sensing element are multiplexed and fed into a low-noise capacitive charge amplifier that im-
plements a Correlated Double Sampling (CDS) at its output to cancel the offset and the 1/f noise. The output
signal is de-multiplexed and transferred to three different S&Hs, one for each channel and made available to
the outside.
The low noise input amplifier operates at 200 kHz while the three S&Hs operate at a sampling frequency of 66
kHz. This allows a large oversampling ratio, which leads to in-band noise reduction and to an accurate output
waveform.
All the analog parameters (zero-g level, sensitivity and self-test) are ratiometric to the supply voltage. Increasing
or decreasing the supply voltage, the sensitivity and the offset will increase or decrease almost linearly. The self
test voltage change varies cubically with the supply voltage
4.3 Factory calibration
The IC interface is factory calibrated for Sensitivity (So) and Zero-g Level (Voff). The trimming values are stored
inside the device by a non volatile structure. Any time the device is turned on, the trimming parameters are
downloaded into the registers to be employed during the normal operation. This allows the user to employ the
device without further calibration.
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| LJ600600-1 | Class J Fuse Blocks |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LIS3L02AS5 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MEMS INERTIAL SENSOR: 3-axis - 【2g/6g LINEAR ACCELEROMETER |
| LIS3L02AS5TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MEMS INERTIAL SENSOR: 3-axis - 【2g/6g LINEAR ACCELEROMETER |
| LIS3L02DQ | 功能描述:加速計 - 板上安裝 2-axis +/-2g Digital MEMS Intertial Sensr 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 數字輸出 - 位數: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 |
| LIS3L02DQ-TR | 功能描述:ACCELEROMETER TRPL AXIS 44QFN RoHS:是 類別:傳感器，轉換器 >> 加速計 系列:- 標準包裝: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:數字 帶寬:50±30Hz 接口:SPI 安裝類型:表面貼裝 封裝/外殼:12-SMD 供應商設備封裝:12-SMD 其它名稱:551-1007-1 |
| LIS3L02DS | 制造商:STMicroelectronics 功能描述: |
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