Freescale MMA8451Q智能低功耗三轴加速度计解决方案

Freescale 公司的MMA8451Q是智能低功耗三轴容性微机械数字加速度计,具有14位分辨率,3x3x1mmQFN封装,电源电压1.95V-3.6V,接口电压1.6V-3.6V,动态可选择满刻度为 ±2g/±4g/±8g ,输出数据速率(ODR)从1.56 Hz 到800 Hz,噪音为99 μg/√Hz ,定流消耗6 μA – 165 μA,主要用在电子罗盘,静态位置检测,笔记本电脑,电子书,实时位置检测,手持产品运动检测,震动和振动监测,用户接口等.本文介绍了MMA8451Q主要特性,框图,应用框图以及MMA845X系列传感器加速计工具箱LFSTBEB845X主要特性,电路图以及MMA8451/2/3Q电路图与PCB布局图.

The MMA8451Q is a smart low-power, three-axis, capacitive micromachined accelerometer with 14 bits of resolution. This accelerometer is packed with embedded functions with flexible user programmable options, configurable to two interrupt pins. Embedded interrupt functions allow for overall power savings relieving the host processor from continuously polling data. There is access to both low-pass filtered data as well as high-pass filtered data, which minimizes the data analysis required for jolt detection and faster transitions. The device can be configured to generate inertial wakeup interrupt signals from any combination of the configurable embedded functions allowing the MMA8451Q to monitor events and remain in a low power mode during periods of inactivity. The MMA8451Q is available in a 3 mm by 3 mm by 1 mm QFN package.

MMA8451Q主要特性:
..

查看全文