The ADXL344 is a versatile 3-axis, digital-output, low g MEMS accelerometer. Selectable measurement range and bandwidth and configurable, built-in motion detection make it suitable for sensing acceleration in a wide variety of applications. Robustness to 10,000 g/of shock and a wide temperature range (?40°C to +85°C) enable use of the accelerometer even in harsh environments.

The ADXL344 measures acceleration with high resolution (13-bit) measurement at up to ±16 g/. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface. The ADXL344 can measure the static acceleration of gravity in tilt-sensing appli-cations, as well as dynamic acceleration resulting from motion or shock. Its high resolution (3.9 mg/LSB) enables measurement of inclination changes less than 1.0°.

Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion. Tap sensing detects single and double taps in any direction. Free-fall sensing detects if the device is falling. Orientation detection reports four- and six-position orientation and can trigger an interrupt upon change in orientation. These functions can be mapped individually to either of two interrupt output pins.

An integrated memory management system with a 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption.

The ADXL344 is supplied in a small, thin, 3 mm × 3 mm × 0.95 mm, 16-terminal, plastic package.

APPLICATIONS

• Handsets
• Gaming and pointing devices
• Personal navigation devices
• Hard disk drive (HDD) protection

• 10至13位分辨率的多用途加速度计，适用于各种不同的应用
• 可通过SPI（3和4线）和 I2C访问数字输出
• 内置运动检测功能使得单振、双振、活动、非活动、方向和自由落体检测都可忽略不计
    用户可调阈值
    中断可独立映射至两个中断引脚
• 低至23 μA的低功耗运行及嵌入式FIFO，可降低整体系统功耗

• 宽电源和I/O电压范围：1.7 V至2.75 V
• 宽工作温度范围（−40°C至+85°C）
• 抗冲击能力：10,000 g
• 小型、超薄、无铅、符合RoHS标准、3 mm × 3 mm × 0.95 mm LGA封装

ADXL344ACCZ-RL，封装：16-Lead LGA (3mm x 3mm)，包装形式及数量：卷带，5000，工作温度：-40 to 85C，AD官网报价：1.31（1000+个）

ADXL344ACCZ-RL7，封装：16-Lead LGA (3mm x 3mm)，包装形式及数量：卷带，1500，工作温度：-40 to 85C，AD官网报价：1.31（1000+个）

EVAL-ADXL344-DB：ADXL344 数据记录器/开发板

ADXL344开发板是一款简单易用的工具，通过提供即时可用的数据采集和固件开发平台来缩短应用程序开发时间。

该板预配置为数据记录器，可用来收集数据，以便改进算法、调谐阈值和熟悉加速度计数据。该板由两节AAA电池供电且完全无连接，同时可无缝集成至便携式应用中。数据记录到MicroSD存储卡上，由此消除了存储容量限制，提高了操作系统灵活性。数据保存在文本文件(.txt)中；因此，操作开发板或读取数据时不用安装任何软件。随板一同提供2GB MicroSD卡和USB MicroSD读卡器。

此外，该板经过完全编程，提供硬件平台，可供固件测试，同时并行开发应用硬件。通信和处理由基于ARM7的ADuC7024微控制器完成，固件用C语言编写。随板一同提供编程电缆，同时在本页面提供开发环境和头文件。最后，平台经过应用固件测试，可在最终应用中复制。原理图和布局可在“支持文档”标签页上找到，并可随意用于您的应用中。

请注意，该板未配置为实时显示数据。若要实时评估ADXL344，请参考惯性传感器评估板。若需简单的ADXL344分线板，请参考 EVAL-ADXL344Z.