User's Guide

ATOP3.5G Product Description
80447ST10636A rev.10 – 2015-03-03
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 34 of 66
Mod. 0808 2011-07 Rev.2
11 Recommended operating conditions
ATOP 3.5G is qualified for automotive use, in accordance with TELIT's "Knowledge-Based
Qualification" ("KBQ", based on ZVEI's Robustness Validation, Ref. [1]), using AEC-Q100-defined
qualification tests, targeting 15 years lifetime.
Table 11 Recommended operating conditions
Allowed temperature ranges.
Symbol Parameter Conditions Min Max Unit
T
stg
storage temperature module storage temperature range before
final reflow, stored in dry pack
40
+125 °C
T
amb
ambient temperature
module limited ambient temperature range for
utility processor (LPC1768)
40
+85 °C
module ambient temperature range all
functions (the limiting factor is NFC)
30
+85 °C
Vch
(VCHG_SNK)
charge voltage on pin
VCHG_SNK
- 5.0 V
V
BAT(VBAT_PA_SNK)
battery supply voltage on
pin VBAT_PA_SNK
battery voltage for RF amplifier 3.4 4.4 V
V
BAT(VBAT_SNK)
battery supply voltage on
pin VBAT_SNK
battery voltage for application processor 3.2 4.4 V
V
BAT(VBAT_MC_SNK)
battery supply voltage on
pin VBAT_MC_SNK
battery voltage for utility processor 3.1 5.5 V
I
BAT(m)
peak current to be used to
dimension decoupling
capacitors on pin
VBAT_PA_SNK
- 2200 mA
12 Thermal characteristics
12.1 Internal temperature sensor
ATOP 3.5G includes an internal temperature sensor. The LPC1768 has access to this sensor to
adapt its behavior to conditions.
12.2 Battery charging
To improve battery lifetime, it is recommended to avoid charging batteries outside of the
temperature range specified by their manufacturers, typically 0 °C to 50 °C.