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參數(shù)資料
| 型號： | LIS202DL |
| 廠商： | 意法半導體 |
| 英文描述： | MEMS motion sensor 2-axis - 【2g/【8g smart digital output “piccolo” accelerometer |
| 中文描述： | MEMS運動傳感器2軸- 【2克/【八克智能數(shù)字輸出的“小報”加速度 |
| 文件頁數(shù)： | 9/36頁 |
| 文件大小： | 249K |
| 代理商： | LIS202DL |
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LIS202DL
Mechanical and electrical specifications
9/36
2.4
Terminology
2.4.1
Sensitivity
Sensitivity describes the gain of the sensor and can be determined e.g. by applying 1g
acceleration to it. As the sensor can measure DC accelerations this can be done easily by
pointing the axis of interest towards the center of the earth, noting the output value, rotating
the sensor by 180 degrees (pointing to the sky) and noting the output value again. By doing
so,
±
1g acceleration is applied to the sensor. Subtracting the larger output value from the
smaller one and dividing the result by 2 leads to the actual sensitivity of the sensor. This
value changes very little over temperature and also time. The Sensitivity Tolerance
describes the range of Sensitivities of a large population of sensors.
2.4.2
Zero-g level
Zero-g level Offset (TyOff) describes the deviation of an actual output signal from the ideal
output signal if no acceleration is present. A sensor in a steady state on a horizontal surface
will measure 0g in X axis and 0g in Y axis. The output is ideally in the middle of the dynamic
range of the sensor (content of OUT registers 00h, data expressed as 2’s complement
number). A deviation from ideal value in this case is called Zero-g offset. Offset is to some
extent a result of stress to MEMS sensor and therefore the offset can slightly change after
mounting the sensor onto a printed circuit board or exposing it to extensive mechanical
stress. Offset changes little over temperature, see “Zero-g level change vs. temperature”.
The Zero-g level tolerance (TyOff) describes the Standard Deviation of the range of Zero-g
levels of a population of sensors.
2.4.3
Self test
Self Test allows to check the sensor functionality without moving it. The Self Test function is
off when the self-test bit of ctrl_reg1 (control register 1) is programmed to ‘0‘. When the self-
test bit of ctrl_reg1 is programmed to ‘1‘ an actuation force is applied to the sensor,
simulating a definite input acceleration. In this case the sensor outputs will exhibit a change
in their DC levels which are related to the selected full scale through the device sensitivity.
When Self Test is activated, the device output level is given by the algebric sum of the
signals produced by the acceleration acting on the sensor and by the electrostatic test-force.
If the output signals change within the amplitude specified inside
Table 3
, then the sensor is
working properly and the parameters of the interface chip are within the defined
specifications.
2.4.4
Click and double click recognition
The click and double click recognition functions help to create man-machine interface with
little software overload. The device can be configured to output an interrupt signal on
dedicated pin when tapped in any direction.
If the sensor is exposed to a single input stimulus it generates an interrupt request on inertial
interrupt pins (INT1 and/or INT2). A more advanced feature allows to generate an interrupt
request when a “double click” stimulus is applied. A programmable time between the two
events allows a flexible adoption to the application requirements. Mouse-button like
application like clicks and double clicks can be implemented.
This function can be fully programmed by the user in terms of expected amplitude and
timing of the stimuli.
相關PDF資料 |
PDF描述 |
|---|---|
| LIS202DLTR | MEMS motion sensor 2-axis - 【2g/【8g smart digital output “piccolo” accelerometer |
| LIS244AL | MEMS motion sensor:2-axis - 【2g ultracompact linear accelerometer |
| LIS244ALTR | MEMS motion sensor:2-axis - 【2g ultracompact linear accelerometer |
| LIS2L02AQ3 | MEMS INERTIAL SENSOR: 2-axis - 【2g/【6g LINEAR ACCELEROMETER |
| LIS2L02AQ3TR | MEMS INERTIAL SENSOR: 2-axis - 【2g/【6g LINEAR ACCELEROMETER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LIS202DLTR | 功能描述:加速計 - 板上安裝 ULTRA COMPACT LOW POWER 2 AXES LIN A 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 |
| LIS244AL | 功能描述:加速計 - 板上安裝 MEMS MOTION SENSOR 2-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 |
| LIS244ALH | 功能描述:加速計 - 板上安裝 MEMS Inertial High Pef 2-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 |
| LIS244ALHTR | 功能描述:加速計 - 板上安裝 MEMS Inertial High Pef 2-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 |
| LIS244ALTR | 功能描述:加速計 - 板上安裝 MEMS motion snsr 2 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 |
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