ST 公司的LIS352AX是新型小尺寸低功耗三軸線性加速度計(jì),包括有傳感元件和IC接口電路,能向外部提供模擬信號(hào). LIS352AX滿刻度量程為±2g,測(cè)量帶寬2.0 kHz,對(duì)溫度有非常高的穩(wěn)定性,嵌入了自測(cè)試,是用戶能檢測(cè)系統(tǒng)功能,可以用在數(shù)據(jù)保護(hù)中的自由跌落檢測(cè),移動(dòng)和電池操作終端,游戲和虛擬真實(shí)輸入設(shè)備以及防盜系統(tǒng)和慣性導(dǎo)航。本文介紹了LIS352AX的主要特性,方框圖,電連接圖以及濾波器負(fù)載電容選擇表。

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.

LIS352AX 主要特性:

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

Power-down mode

Embedded self test

10000g high shock survivability

ECOPACK RoHS and “Green” compliant

LIS352AX 應(yīng)用:

Free-fall detection for data protection

Mobile and battery operated terminals

Gaming and virtual reality input devices

Antitheft systems and inertial navigation



圖1.LIS352AX方框圖



圖2.LIS352AX電連接圖



表1.濾波器電容Cload (x,y,z) 選擇表