RD3924MMA8450Q 3-axis 8-bit/12-bit digital accelerometer
The MMA8450Q Accelerometer is an intelligent, low-power, low-noise, capacitive micromechanical accelerometer in a 3 x 3 x 1 mm package with a resolution of 12 bits. This accelerometer contains a large number of flexible, user-programmable embedded functions with two configurable interrupt pins. MMA8450Q supports user-selectable ranges of ±2G/±4G/±8G and can measure acceleration at 400 Hz, 200 Hz, 100 Hz, 50 Hz, 12.5 Hz, and 1.563 Hz Data Output Rate (ODR). These output data rates correspond to sample intervals of 2.5 ms to 640 ms, respectively.
When any of the acceleration values in the three axes exceed the programmed acceleration threshold, the device can be configured to generate an inertial wake-up interrupt signal. The threshold for the acceleration and time of the interrupt generator can be programmed by the end user.
MMA8450Q is packaged in QFN plastic and can operate well in temperatures ranging from -40°C to +85°C.
特性
- 1.71 V至1.89 V工作电压
- ±2g/±4g/±8g全量程动态可选
- 输出数据速率(ODR)400 Hz至1.563 Hz
- 正常模式ODR=400 Hz时400 μg/vHz噪声
- 12位数字输出
- I 2 C数字输出接口(快速模式工作频率最高400 kHz)
- 可用于8个中断源的2个可编程中断引脚
- 嵌入式4通道运动检测
- 自由落体或运动检测：2通道
- 脉冲检测: 1通道
- 瞬变检测: 1通道
- 带滞后补偿的方向(竖向/横向)检测
- 在自动唤醒和睡眠功能中，可实现自动输出数据速率变化
- 32段先入先出(FIFO)采样
- 自我检测
- 最高可承受10,000g的撞击
- 符合有害物质限用(RoHS)标准