SARA-R4 datasheet(21/43 Pages) U-BLOX

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SARA-R4 series - Data sheet

UBX-16024152 - R18

Electrical specifications

Page 21 of 43

4.2 Operating conditions

☞ Unless otherwise indicated, all operating condition specifications are at an ambient temperature

of +25 °C.

⚠ Operation beyond the operating conditions is not recommended and extended exposure beyond

them may affect device reliability.

4.2.1 Operating temperature range

Parameter

Min. Typ. Max. Unit

Remarks

Normal operating

temperature

–20 +25 +65 °C

Normal operating temperature range

(fully functional and meet 3GPP / ETSI specifications)

Extended operating

temperature

–40

+85 °C

Extended operating temperature range

(RF performance may be affected outside normal operating range,

though module is fully functional)

Table 8: Environmental conditions

4.2.2 Thermal parameters

Symbol Parameter

Min. Typ. Max. Unit Remarks

ΨM-A

Module-to-Ambient

thermal parameter

°C/W Thermal characterization parameter

ΨM-A = (TM – TA) / PH proportional to the temperature difference

between the internal temperature sensor of the module (TM) and

the ambient temperature (TA), produced by the module heat power

dissipation (PH), with the module mounted on a 79 x 62 x 1.41 mm 4-

Layer PCB with a high coverage of copper, in still air conditions

ΨM-C

Module-to-Case

thermal parameter

°C/W Thermal characterization parameter

ΨM-C = –TM - TC) / PH proportional to the temperature difference

between the internal temperature sensor of the module (TM) and

the ambient temperature (TC), produced by the module heat power

dissipation (PH), with the module mounted on a 79 x 62 x 1.41 mm 4-

Layer PCB with a high coverage of copper, with a robust aluminum

heat-sink and with forced air ventilation, i.e. reducing to a value

close to 0 °C/W the thermal resistance from the case of the module

to the ambient

Table 9: Thermal characterization parameters of the module

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