EVAL-ADXL346Z Analog Devices Inc, EVAL-ADXL346Z Datasheet - Page 9

• Manufacturer Part Number: EVAL-ADXL346Z
• Description: Inertial Sensor Evaluation System
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADXL346Z

• Silicon Manufacturer: Analog Devices
• Silicon Core Number: ADXL346
• Kit Application Type: Sensing - Motion / Vibration / Shock
• Application Sub Type: Accelerometer
• Silicon Family Name: IMEMS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Evaluation Board User Guide
POWER CONSUMPTION TAB
The Power Consumption tab shows the advantages of using the
inactivity and activity functions to modulate system power and
obtain overall power savings (see Figure 14).
When inactivity is detected, caused by acceleration below the
amount set in the THRESH_INACT [mg] box for the amount
of time set in the TIME_INACT [s] box, the accelerometer is
placed into a lower data rate as set in the Inactive Data Rate [Hz]
menu. Because the power of the ADXL346 is modulated with
data rate, an immediate power savings is achieved. When activity is
detected (an acceleration above that set in the THRESH_ACT
[mg] box), the part is placed back into a higher data rate as
specified in the Active Data Rate [Hz] menu.
Figure 14. Power Consumption Tab
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Additionally, the Micro In Calculation indicator lights up,
signifying that a controller or microprocessor is actively pulling
data from the part or processing it. In addition to more power
savings from the ADXL346, more power can be saved by
powering down the microprocessor during periods of inactivity
and using the ADXL346 activity interrupt to wake the
microprocessor up during periods of activity.
The ACT/INACT_CTL indicators can be used to enable the
different axes in the activity or inactivity events. After updating
the participating axes, thresholds, timers, or data rates, click the
Configure Registers button. The registers are not updated until
the button is clicked. Additionally, the button updates the registers
only when data acquisition is active. If the button is clicked when
no acquisition is occurring, the button remains inactive until
clicked again or until acquisition is started.
To begin data acquisition, click the Start Acq. button in the
bottom left corner of the screen. To end data acquisition, click
the Stop Acq. button in the bottom left corner of the screen.
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