ADXL313 データシートの表示（PDF） - Analog Devices

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ADXL313

Digital Accelerometer / 32-Lead Lead Frame Chip

Analog Devices 

Data Sheet

Autosleep Mode

Additional power savings can be obtained by having the

ADXL313 automatically switch to sleep mode during periods of

inactivity. To enable this feature, set the THRESH_INACT

register (Address 0x25) to an acceleration threshold value.

Levels of acceleration below this threshold are regarded as no

activity. Set TIME_INACT (Address 0x26) to an appropriate

inactivity time period. Then set the AUTO_SLEEP bit and the

link bit in the POWER_CTL register (Address 0x2D). If the

device does not detect a level of acceleration in excess of

THRESH_INACT for TIME_INACT seconds, the device is

transitioned to sleep mode automatically. Current consumption

at less than 10 Hz data rates used in this mode is typically 55 µA

for a VS of 3.3 V.

ADXL313

Standby Mode

For even lower power operation, standby mode can be used.

In standby mode, current consumption is reduced to 0.1 µA

(typical). In this mode, no measurements are made. Standby

mode is entered by clearing the measure bit (Bit 3) in the

POWER_CTL register (Address 0x2D). Placing the device into

standby mode preserves the contents of the FIFO.

Rev. 0 | Page 9 of 28

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