EVAL-ADXL346Z Analog Devices Inc, EVAL-ADXL346Z Datasheet - Page 36

• 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

ADXL346
Changes in noise performance, self-test response, and supply
current are discussed elsewhere throughout the data sheet. For
more information about noise performance, review the Noise
Performance section. The Self-Test section discusses both the
operation of self-test over voltage (a square relationship with the
supply voltage) and the conversion of the self-test response in
g’s to LSBs. Finally, Figure 33 shows the impact of supply voltage
on typical current consumption at a 100 Hz output data rate,
with all other output data rates following the same trend.
OFFSET PERFORMANCE AT LOWEST DATA RATES
The ADXL346 offers several output data rates and bandwidths
designed for a wide range of applications. However, at the lowest
data rates, described as those data rates below 6.25 Hz, the offset
performance over temperature can vary significantly from the
remaining data rates. Figure 56, Figure 57, and Figure 58 show
the typical offset performance of the ADXL346 over temperature
for data rates of 6.25 Hz and lower. All plots are normalized to
the offset at 100 Hz output data rate; therefore, a nonzero value
corresponds to additional offset shift due to the temperature for
that data rate.
When using the lowest data rates, it is recommended that the
operating temperature range of the device be limited to provide
minimal offset shift across the operating temperature range.
Due to variability between parts, it is also recommended that
calibration over temperature be performed if any data rates
below 6.25 Hz are in use.
Rev. A | Page 36 of 40
Figure 56. Typical X-Axis Output vs. Temperature at Lower Data Rates,
Figure 57. Typical Y-Axis Output vs. Temperature at Lower Data Rates,
Figure 58. Typical Z-Axis Output vs. Temperature at Lower Data Rates,
140
120
100
140
120
100
140
120
100
–20
80
60
40
20
80
60
40
20
80
60
40
20
0
0
0
Normalized to 100 Hz Output Data Rate, V
Normalized to 100 Hz Output Data Rate, V
Normalized to 100 Hz Output Data Rate, V
25
25
25
0.10Hz
0.20Hz
0.39Hz
0.78Hz
1.56Hz
3.13Hz
6.25Hz
0.10Hz
0.20Hz
0.39Hz
0.78Hz
1.56Hz
3.13Hz
6.25Hz
0.10Hz
0.20Hz
0.39Hz
0.78Hz
1.56Hz
3.13Hz
6.25Hz
35
35
35
45
TEMPERATURE (°C)
45
TEMPERATURE (°C)
45
TEMPERATURE (°C)
55
55
55
65
65
65
S
S
S
75
75
75
= 2.6 V
= 2.6 V
= 2.6 V
85
85
85