ST公司的LIS302DL 小型低功耗(低于1mW)MEMS三轴线性加速度计,具有线性的数字输出.他包括有传感元件和能通过I2C/SPI串行接口提供测量加速度的IC接口,满刻度量程是±2g/±8g,数据输出速率是100Hz或400Hz.广泛应用在自由降落检测,运动检测,游戏和虚拟现实输入设备以及震动检测和补偿等.本文介绍了LIS302DL的主要性能,方框图以及评估板EK302DL的性能和电路图.
LIS302DL MEMS motion sensor 3-axis - ±2g/±8g smart digital output “piccolo” accelerometer
概述:
The LIS302DL is an ultra compact low-power three axes linear accelerometer. It includes a sensing element and an IC interface able to provide the measured acceleration to the external world through I2C/SPI serial interface.
The sensing element, capable of detecting the acceleration, is manufactured using a edicated process developed by ST to produce inertial sensors and actuators in silicon.
The IC interface is manufactured using a CMOS process that allows to design a dedicated circuit which is trimmed to better match the sensing element characteristics.
The LIS302DL has dynamically user selectable full scales of ±2g/±8g and it is capable of
measuring accelerations with an output data rate of 100Hz or 400Hz.
A self-test capability allows the user to check the functioning of the sensor in the final application.

The device may be configured to generate inertial wake-up/free-fall interrupt signals when a programmable acceleration threshold is crossed at least in one of the three axes. Thresholds and timing of interrupt generators are programmable by the end user on the fly.
The LIS302DL is available in plastic Thin Land Grid Array package (TLGA) and it is guaranteed to operate over an extended temperature range from -40°C to +85°C.

The LIS302DL belongs to a family of products suitable for a variety of applications:

主要应用:
Free-Fall detection
Motion activated functions
Gaming and Virtual Reality input devices
Vibration Monitoring and Compensation

主要特性:
2.16V to 3.6V supply voltage
1.8V compatible IOs
<1mW power consumption
±2g/±8g dynamically selectable Full-Scale
I2C/SPI digital output interface
Programmable multiple interrupt generator
Click and double click recognition
Embedded high pass filter
Embedded self test
10000g high shock survivability
ECOPACK RoHS and “Green” compliant



图1.LIS302DL方框图.



图2.LIS302DL 电连接图

The EK302DL will help you in evaluating the LIS302DL 3-Axis - ±2g/±8g Digital
Output Low Power Linear Accelerometer MEMS accelerometers. The kit implements a typical application which enables the user to acquire the acceleration data sensed by the LIS302DL product. In details, the signal measured by the sensor are read by the microcontroller of the ST7 family mounted on the board and they are sent to a PC for further processing via USB link.



图3.评估板EK302DL外形图.



图4. 评估板EK302DL详细电路图.


详情请见:

http://www.st.com/stonline/products/literature/ds/12726/lis302dl.pdf

来源：中电网