ST AIS326DQ数字三轴加速度方案

ST公司的AIS326DQ是数字输出三轴加速度计,包括有传感元件和SPI串行接口. AIS326DQ的测量范围可由用户选定2g 或6g,三个轴向的带宽640Hz.器件所具有的自测试功能能使用户能检测系统的功能. AIS326DQ可广泛应用在汽车电子的安全系统中如防盗系统和惯性导航系统,振荡检测和补偿,倾斜测量,运动激活功能以及黑盒子事件记录仪等.本文介绍了AIS326DQ的主要特性,方框图以及应用连接图.

The AIS326DQ is a three axes digital output accelerometer that includes a sensing element and an IC interface able to take the information from the sensing element and to provide the measured acceleration signals to the external world through an SPI serial interface.

The sensing element, capable of detecting the acceleration, is manufactured using a dedicated process developed by ST to produce inertial sensors and actuators in silicon.

The IC interface instead is manufactured using a CMOS process that allows high level of
integration to design a dedicated circuit which is factory trimmed to better match the sensing element characteristics.
The AIS326DQ has a user selectable full scale of 2 g, 6 g and it is capable of measuring acceleration over a bandwidth of 640 Hz for all axes. The device bandwidth may be selected accordingly to the application requirements. The self-test capability allows the user to check the functioning of the system.

The device is available in plastic quad flat package no lead surface mount (QFPN) and it is specified over a temperature range extending from -40 °C to +105 °C.

The AIS326DQ may be used in non-safety automotive applications, such as:

■Anti-theft systems and inertial navigation
■Motion activated functions
■Vibration monitoring and compensation
■Tilt measurements
■Black boxes, event recorders

AIS326DQ 主要特性:
■3.3 V single supply operation
■1.8 V compatible IOs
■SPI digital output interface(a)
■12 bit resolution
■Interrupt activated by motion
■Programmable interrupt threshold
■Embedded self-test
■High shock survivability
■ECOPACK® compliant
■Extended temperature range -40 °C to +105 °C



图1.AIS326DQ方框图



图2.AIS326DQ应用连接图