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ADI ADXL362微功耗三轴MEMS加速度计解决方案 免费猫

发布时间:2020-02-17 14:01:05 阅读: 来源:雕版机厂家

ADI ADXL362微功耗三轴MEMS加速度计解决方案

EVAL-ADXL362Z是一个简单的接口板,可以将ADXL362微功率,3轴,数字输出MEMS加速度计,轻松连接到现有的系统。由于其体积小,EVAL-ADXL362Z对系统的性能和加速度计的影响很小,因此,它是现有的系统ADXL362评估的理想选择。需要注意,ADXL362必须通过SPI进行数字通信。EVAL-ADXL362Z没有处理器,外部固件必须由用户提供。

EVAL-ADXL362Z-MLP是一个完整的系统,用于ADXL362微功率,3轴,数字输出MEMS加速度计的实时评价。该系统具有图形用户界面(GUI),便于评价参数,如功耗,温度系数,噪声等。该系统包括一个主板和一个卫星板。传感器被安置在卫星板上的插座上,使得一个评估体系可以进行多个部件的评估。

如要完整的系统,请订购EVAL-ADXL362Z-MLP。此套件包括主板,卫星电路板,加速度计和电缆。使用零件编号EVAL-ADXL362Z-S,可以订购卫星电路板套件。卫星套件订单包括卫星电路板和加速度计。

ADXL362: Micropower 3-Axis MEMS Accelerometer: Digital Output, ±2/±4/±8 g Range

The ADXL362 is an ultra-low power 3-axis MEMS accelerometer that consumes less than 2 μA at a 100 Hz output data rate, and 300 nA in motion-triggered Wake-Up Mode.

Unlike accelerometers that use power duty cycling to achieve low power consumption, the ADXL362 does not alias input signals by undersampling; it samples the sensor’s full bandwidth at all data rates.

The ADXL362 always provides 12-bit output resolution; 8-bit formatted data is also provided for more efficient single-byte transfers when a lower resolution is sufficient. Measurement ranges of ±2 g, ±4 g, and ±8 g are available, with a resolution of 1 mg/LSB on the ±2 g range. For applications where a noise level lower than the ADXL362’s normal 550 μg/7Hz is desired, either of two lower noise modes (down to 175 μg/7Hz typ) may be selected at minimal increase in supply current.

In addition to its ultra-low power consumption, the ADXL362 has many features to enable true system-level power reduction.

It includes a deep multimode output FIFO, a built-in micropower temperature sensor, and several activity detection modes including adjustable-threshold sleep and wakeup operation that can run as low as 300 nA at a 6 Hz (approximate) measurement rate. A pin output is provided to directly control an external switch when activity is detected if desired. In addition, the ADXL362 has provisions for external control of sampling time and/or an external clock.

The ADXL362 operates on a wide 1.6 V to 3.6 V supply range, and can interface, if necessary, to a host operating on a separate, lower supply voltage. The ADXL362 is available in a 3 mm × 3.25 mm × 1.06 mm package.

ADXL362主要特性:

Ultra low power

Power can be derived from coin cell battery

1.8 μA @ 100 Hz ODR, 2.0V supply

3.0 μA @ 400 Hz ODR, 2.0V supply

300 nA motion-activated Wake-up Mode

10nA Standby Current

Built-in features for system-level power savings:

Adjustable-threshold sleep/wake modes for motion activation

Autonomous interrupt processing without need for microcontroller intervention, so the rest of the system can be turned off completely

Deep embedded FIFO minimizes host processor load

Awake state output enables implementation of standalone motion-activated switch High resolution of 1 mg/LSB

Low noise down to 175 μg/@Hz

Wide supply and I/O voltage ranges: 1.6 V to 3.6 V

Operates off 1.8V to 3.3V rails

Acceleration sample synchronization via external trigger

On-chip temperature sensor

SPI digital interface

Measurement ranges selectable via SPI command

Small and thin 3 mm × 3.25 mm × 1.06 mm package

ADXL362应用:

Hearing aids

Home healthcare devices

Motion-enabled power save switch

Wireless sensors

Motion-enabled metering devices

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