EVAL-ADXL312Z Analog Devices, EVAL-ADXL312Z Datasheet - Page 11

• Manufacturer Part Number: EVAL-ADXL312Z
• Description: Daughter Cards & OEM Boards EB Digital Output Three-Axis Accel
• Manufacturer: Analog Devices
• Series: ADXL312r

Specifications of EVAL-ADXL312Z

• Rohs: yes
• Product: Evaluation Boards
• Description/function: 3 axis accelerometer evaluation board
• Interface Type: I2C, SPI
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 2 V to 3.6 V
• Factory Pack Quantity: 1
• For Use With: ADXL312

Table 6. Current Consumption vs. Data Rate
(T
Output Data
Rate (Hz)
3200
1600
800
400
200
100
50
25
12.5
6.25
Table 7. Current Draw vs. Data Rate, Low Power Mode
(T
Output Data
Rate (Hz)
400
200
100
50
25
12.5
A
A
= 25°C, V
= 25°C, V
S
S
= V
= V
Bandwidth (Hz)
1600
800
400
200
100
50
25
12.5
6.25
3.125
Bandwidth (Hz)
200
100
50
25
12.5
6.25
DD I/O
DD I/O
= 3.3 V)
= 3.3 V)
Rate Code
1111
1110
1101
1100
1011
1010
1001
1000
0111
0110
Rate Code
1100
1011
1010
1001
1000
0111
I
170
115
170
170
170
170
115
82
65
57
I
115
82
65
57
50
43
DD
DD
(μA)
(μA)
Rev. 0 | Page 11 of 32
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 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.
S
of 3.3 V.
ADXL312