Cinterion
®
LTE Terminals Hardware Interface Description
4.4 Operating Temperatures
60
ELSxT_HID_v04
2018-09-04
Confidential / Preliminary
Page 56 of 102
4.4
Operating Temperatures
Note: Within the specified operating temperature ranges the board temperature may vary to a
great extent depending on operating mode, used frequency band, radio output power and cur-
rent supply voltage. Note also the differences and dependencies that usually exist between
board (PCB) temperature of the LTE module and its ambient temperature.
Table 25:
Temperature characteristics
Parameter
Min
Typical
Max
Unit
Normal operation
1
1. Board temperature of LTE module.
-30
+85
°C
Extended operation
2
2. Extended operation allows normal mode speech calls or data transmission for limited time until au-
tomatic thermal shutdown takes effect. Within the extended temperature range (outside the normal
operating temperature range) the specified electrical characteristics may be in- or decreased.
-40 to -30
+85 to +90
°C
Automatic thermal shutdown
3
3. Due to temperature measurement uncertainty, a tolerance of ±3°C on these switching thresholds
may occur.
<-40
>+90
°C
Thermal resistance (R
th
)
4
2G operation (with P
th
= 1.5W)
3G operation (with P
th
= 3.5W)
4. Thermal resistance (R
th
) of the LTE Terminals at the highest possible thermal power (P
th
) dissipation,
i.e., at the worst possible network conditions. Measured in still air with an air gap of at least 100mm
between the LTE Terminals and other objects.
10
11.5
K/W