EVAL-ADXL362Z-DB Analog Devices, EVAL-ADXL362Z-DB Datasheet - Page 14

• Manufacturer Part Number: EVAL-ADXL362Z-DB
• Description: Acceleration Sensor Development Tools enl Datalogger Board of ADXL362
• Manufacturer: Analog Devices

Specifications of EVAL-ADXL362Z-DB

• Rohs: yes
• Tool Is For Evaluation Of: ADXL362
• Acceleration: 2 g, 4 g, 8 g
• Sensing Axis: Triple Axis
• Interface Type: SPI
• Operating Voltage: 1.6 V to 3.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Current: 1.8 uA
• Output Type: Digital
• Product: Development Boards
• Sensitivity: 1 mg/LSB, 2 mg/LSB, 4 mg/LSB
• Factory Pack Quantity: 1

ADXL362
Current consumption varies somewhat with output data rate as
shown in Figure 30, remaining below 5.0 µA over the entire
range of data rates and operating voltages.
Antialiasing
The analog-to-digital converter (ADC) of the
at the (user selected) output data rate. In the absence of anti-
aliasing filtering, it aliases any input signals whose frequency is
more than half the data rate. To mitigate this, a two-pole low-
pass filter is provided at the input of the ADC.
The user can set this antialiasing filter to a bandwidth that is at
½ the data rate or ¼ the data rate. Setting the antialiasing filter
pole to ½ of the output data rate provides less aggressive
antialiasing filtering, but maximizes bandwidth and is adequate
for most applications. Setting the pole to ¼ of the data rate
reduces bandwidth for a given data rate, but provides more
aggressive antialiasing.
The antialiasing filter of the
conservative setting, where bandwidth is set to one-fourth the
output data rate.
Figure 30. Current Consumption vs. Output Data Rate at Several
6
5
4
3
2
1
0
0
V
V
V
V
V
S
S
S
S
S
= 1.6V
= 2.0V
= 2.5V
= 3.0V
= 3.5V
100
OUTPUT DATA RATE (Hz)
Supply Voltages
ADXL362
200
defaults to the more
300
ADXL362
samples
400
Rev. B | Page 14 of 44
POWER/NOISE TRADEOFF
The
expense of only a small increase in current consumption.
The noise performance of the
typically 7 LSB rms at 100 Hz bandwidth, is adequate for most
applications, depending upon bandwidth and the desired reso-
lution. For cases where lower noise is needed, the
provides two lower noise operating modes that trade reduced
noise for a somewhat higher current consumption.
Table 7 lists the current consumption and noise densities obtained
for normal operation and the two lower noise modes at a typical
2.0 V supply.
Table 7. Noise and Current Consumption: Normal Operation,
Low Noise Mode, and Ultralow Noise Mode @ V
ODR = 100 Hz
Mode
Normal Operation
Low Noise
Ultralow Noise
Operating the
noise. Table 8 lists the current consumption and noise densities
obtained for normal operation and the two lower noise modes
at the highest recommended supply, 3.3 V.
Table 8. Noise and Current Consumption: Normal Operation,
Low Noise Mode, and Ultralow Noise Mode @ V
ODR = 100 Hz
Mode
Normal Operation
Low Noise
Ultralow Noise
ADXL362
ADXL362
offers a few options for decreasing noise at the
at a higher supply voltage also decreases
Noise
(µg/√Hz)
Typical
550
400
250
Noise
(µg/√Hz)
Typical
380
280
175
ADXL362
in normal operation,
Current
Consumption (µA)
Typical
1.8
3.3
13
Current
Consumption (µA)
Typical
2.7
4.5
15
Data Sheet
ADXL362
S
S
= 2.0 V,
= 3.3 V,