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ADXL313 Datasheet(Arkusz danych) 9 Page - Analog Devices

Numer części ADXL313
Szczegółowy opis  3-Axis, ±0.5 g/±1 g/±2 g/±4 g Digital Accelerometer
Pobierz  28 Pages
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Data Sheet
ADXL313
Rev. 0 | Page 9 of 28
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.
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.




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