Freescale MMA845xQ系列三轴加速度计开发方案

Freescale公司的MMA845xQ系列是智能低功耗三轴容性微机械加速度计,具有12位分辨率,电源电压1.95V-3.6V,接口电压1.6V-3.6V,动态可选择满刻度+/-2g/+/-4g/+/-8g,输出数据速率(ODR)为1.56 Hz 到800 Hz,12位和8位数字输出,I2C数字输出接口,电流消耗6uA-160uA,主要用于电子罗盘,静态方向检测,笔记本,电子书等跌落检测,实时方向检测和工作分析,手持设备运动检测,震动和振动监视和用户接口.本文介绍了MMA845xQ系列主要特性和方框图,应用框图以及MMA845xQ加速计开发套件LFSTBEB845x电路图与MMA8451/2/3Q应用电路图.

The MMA8452Q is a smart low-power, three-axis, capacitive micromachined accelerometer with 12 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.

The MMA8452Q has user selectable full scales of +/-2g/+/-4g/+/-8g with high-pass filter filtered data as well as non-filtered data available real-time. The device can be configured to generate inertial wakeup interrupt signals from any combination of the configurable embedded functions allowing the MMA8452Q to monitor events and remain in a low power mode during periods of inactivity. The MMA8452Q is available in a 3 mm by 3 mm by 1 mm QFN package.

MMA845xQ系列主要特性:
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