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ADXL312ACPZ Folha de dados(PDF) 11 Page - Analog Devices

Nome de Peças ADXL312ACPZ
Descrição Electrónicos  3-Axis, 짹1.5 g/짹3 g/짹6 g/짹12 g Digital Accelerometer
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

ADXL312ACPZ Folha de dados(HTML) 11 Page - Analog Devices

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ADXL312
Rev. 0 | Page 11 of 32
Table 6. Current Consumption vs. Data Rate
(TA = 25°C, VS = VDD I/O = 3.3 V)
Output Data
Rate (Hz)
Bandwidth (Hz)
Rate Code
IDD (μA)
3200
1600
1111
170
1600
800
1110
115
800
400
1101
170
400
200
1100
170
200
100
1011
170
100
50
1010
170
50
25
1001
115
25
12.5
1000
82
12.5
6.25
0111
65
6.25
3.125
0110
57
Table 7. Current Draw vs. Data Rate, Low Power Mode
(TA = 25°C, VS = VDD I/O = 3.3 V)
Output Data
Rate (Hz)
Bandwidth (Hz)
Rate Code
IDD (μA)
400
200
1100
115
200
100
1011
82
100
50
1010
65
50
25
1001
57
25
12.5
1000
50
12.5
6.25
0111
43
Autosleep Mode
Additional power savings can be had by having the ADXL312
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
levels. 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
THRES_INACT for TIME_INACT seconds, then the device is
transitioned to sleep mode automatically. Current consumption
at the sub-8 Hz data rates used in this mode is typically 30 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 0.1μA
(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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