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| 型号： | LIS331ALTR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, QCC16 |
| 封装： | 3 X 3 MM, 1 MM HEIGHT, GREEN, LGA-16 |
| 文件页数： | 3/16页 |
| 文件大小： | 190K |
| 代理商： | LIS331ALTR |
LIS331AL
Functionality
11/16
3
Functionality
The LIS331AL is a nano low-power, analog output three-axis linear accelerometer packaged
in a LGA package. The complete device includes a sensing element and an IC interface
able to take the information from the sensing element and to provide an analog signal to the
external world.
3.1
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 in fF range.
3.2
IC Interface
The complete signal processing uses a fully differential structure, while the final stage
converts the differential signal into a single-ended one to be compatible with the external
world.
The first stage is a low-noise capacitive amplifier that implements a Correlated Double
Sampling (CDS) at its output to cancel the offset and the 1/f noise. The produced signal is
then sent to three different S&Hs, one for each channel, and made available to the outside.
All the analog parameters (output offset voltage and sensitivity) are ratiometric to the
voltage supply. Increasing or decreasing the voltage supply, the sensitivity and the offset will
increase or decrease linearly. The feature provides the cancellation of the error related to
the voltage supply along an analog to digital conversion chain.
3.3
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.
相关PDF资料 |
PDF描述 |
|---|---|
| LIS331DLF | SPECIALTY ANALOG CIRCUIT, PBCC16 |
| LIS331DLHTR | SPECIALTY ANALOG CIRCUIT, PBCC16 |
| LIS331DLMTR | SPECIALTY ANALOG CIRCUIT, PBCC16 |
| LIS331DL | MOTION SENSOR, PQCC16 |
| LIS331DLTR | MOTION SENSOR, PQCC16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LIS331DL | 功能描述:加速计 - 板上安装 MEMS MOTION SENSOR 3-AXIS RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
| LIS331DL | 制造商:STMicroelectronics 功能描述:ACCELEROMETER, MEMS, 3-AXIS, DIGITAL O/P, LGA-16; MEMS Sensor Output:Digital; Measurement Axis:X, Y, Z; Acceleration Range: 2g, 8g; Supply Voltage Min:2.16V; Supply Voltage Max:3.6V; Sensor Case Style:LGA; No. of Pins:16 ;RoHS Compliant: No |
| LIS331DL_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:MEMS motion sensor 3-axis - 【2g/【8g smart digital output -nano-accelerometer |
| LIS331DLF | 功能描述:加速计 - 板上安装 DGTL OUTPT MTN SEN MEMS ULTRA LO PWR RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
| LIS331DLFTR | 功能描述:加速计 - 板上安装 DGTL OUTPT MTN SEN MEMS ULTRA LO PWR RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
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