ST LIS352AX MEMS三轴加速度方案
ST 公司的LIS352AX是新型小尺寸低功耗三轴线性加速度计,包括有传感元件和IC接口电路,能向外部提供模拟信号. LIS352AX满刻度量程为±2g,测量带宽2.0 kHz,对温度有非常高的稳定性,嵌入了自测试,是用户能检测系统功能,可以用在数据保护中的自由跌落检测,移动和电池操作终端,游戏和虚拟真实输入设备以及防盗系统和惯性导航。本文介绍了LIS352AX的主要特性,方框图,电连接图以及滤波器负载电容选择表。
LIS352AX: MEMS inertial sensor 3-axis - ±2g absolute analog output accelerometer
The LIS352AX is the new small size, low-power three-axis linear accelerometer that includes a sensing element and an IC interface able to provide an absolute analog signal to the external world. The IC interface is manufactured using a CMOS process that allows high level of integration to design a dedicated circuit which is trimmed to better match the sensing element characteristics.
The LIS352AX has a full scale of ±2g and it is capable of measuring accelerations over amaximum bandwidth of 2.0 kHz. The device bandwidth may be reduced by using external capacitances. The self-test capability allows the user to check the functioning of the system.
An embedded multiplexer allows to redirect the analog outputs onto a single pin for operation with a single channel A/D converter.
ST is already in the field with several hundreds million sensors with excellent acceptance from the market in terms of quality, reliability and performance.
The LIS352AX is provided in plastic land grid array (LGA) package. Several years ago ST pioneered successfully the usage of this package for accelerometers. Today ST has the widest manufacturing capability and strongest expertise in the world for production of sensor in plastic LGA package.
Absolute 0-g level and sensitivity
Very high stability over temperature
3 acceleration channels plus multiplexed analog output
Factory trimmed device sensitivity and 0-g level
Embedded self test
10000g high shock survivability
ECOPACK RoHS and “Green” compliant
Free-fall detection for data protection
Mobile and battery operated terminals
Gaming and virtual reality input devices
Antitheft systems and inertial navigation
表1.滤波器电容Cload (x,y,z) 选择表