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參數(shù)資料
| 型號： | LIS302ALB |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC14 |
| 封裝： | 3 X 5 MM, 0.92 MM HEIGHT, 0.80 MM PITCH, GREEN, PLASTIC, TLGA-14 |
| 文件頁數(shù)： | 17/17頁 |
| 文件大小： | 235K |
| 代理商： | LIS302ALB |
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LIS302ALB
Functionality
9/17
3
Functionality
The LIS302ALB is an “piccolo” 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. The sensor provides the three accelerations and one
multiplexed analog output.
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.
The device provides an embedded multiplexer to allow the redirection of either the analog
output signals Voutx, Vouty, and Voutz or of an auxiliary input signal onto a single pin for
operation with a single channel A/D converter.
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.
The product is factory calibrated at 3.3V. For availability of different supply voltage in the
maximum range [2.16V, 3.6V] contact factory
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 in 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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LIS302ALBTR | 功能描述:加速計 - 板上安裝 MEMS Motion Sensor 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 |
| LIS302ALK | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MEMS motion sensor 3-axis-【2g analog output "piccolo" accelerometer |
| LIS302ALKTR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MEMS motion sensor 3-axis-【2g analog output "piccolo" accelerometer |
| LIS302DL | 功能描述:加速計 - 板上安裝 MEMS motion snsr 3 axis 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 |
| LIS302DL_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MEMS motion sensor 3-axis - 【2g/【8g smart digital output “piccolo” accelerometer |
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