IDP-782 - Hardware Guide
3.12 Sensors
3.12.1 Temperature Sensor
Parameter
Value
Range
-40 to +85°C
Accuracy
±2°C (-25 to +85°C)
±3°C (below -25°C)
3.12.2 Accelerometer
The terminal has a 3D accelerometer to detect motion in any axis.
In low power applications frequent GPS fixes can dominate the power budget. To reduce the power budget
effects of GPS fixes, the accelerometer can be used to detect if motion has occurred.
The accelerometer thresholds to detect advanced features such as driver behavior monitoring vary
depending on the environment. In order to avoid false detects, extensive testing is required to ensure that
adequate acceleration magnitude thresholds and time durations are used.
Parameter
Condition
Min.
Typical
Max.
Units
Resolution
2 g
-
3.91
-
mg
Acceleration Range
software selectable
-
±2
-
g
-
±4
-
g
-
±8
-
g
-
±16
-
g
Bandwidth Filtering
Selectable via digital interface
8
-
1000
Hz
Sensitivity
2 g
-
256
-
LSB/g
4 g
-
128
-
LSB/g
8 g
-
64
-
LSB/g
16 g
-
32
-
LSB/g
Sensitivity Temperature Drift
3V supply
-
+-0.02
-
%/K
Zero-g Offset
Ta = 25°C
-
+-80
-
mg
Zero-g Offset Temperature Drift
3V supply
-
+-1
-
mg/K
Wake up time
From low power or suspend modes
-
0.8
-
mS
Start Up Time
Power on reset
-
2
-
mS
T213, Version 02
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