Ublox SARA-N4 Series, Руководство по системной интеграции

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SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R11 System description Page 22 of 157
1.5.1.1 VCC supply requirements
Table 6 summarizes the requirements for the VCC modules supply. See section 2.2.1 for suggestions to
correctly design a VCC supply circuit compliant with the requirements listed in Table 6 .
⚠
The supply circuit affects the RF compliance of the device integrating SARA-R4/N4 series modules with
applicable required certification schemes as well as antenna circuit design. Compliance is guaranteed if
the requirements summarized in the
Table 6 are fulfilled.
Item Requirement Remark
VCC nominal voltage Within VCC normal operating range:
SARA-R404M / SARA-R410M / SARA-N410:
3.2 V / 4.2 V
SARA-R412M:
3.2 V / 4.5 V
RF performance is guaranteed when VCC voltage is
inside the normal operating range limits.
RF performance may be affected when VCC voltage is
outside the normal operating range limits, though the
module is still fully functional until the
VCC voltage is
inside the extended operating range limits.
VCC voltage during
normal operation
Within VCC extended operating range:
SARA-R404M / SARA-R410M / SARA-N410:
3.0 V / 4.2 V
SARA-R412M:
3.0 V / 4.5 V
VCC voltage must be above the extended operating
range minimum limit to switch-on the module.
The module may switch-off when the VCC voltage drops
below the extended operating range minimum limit.
Operation above VCC extended operating range is not
recommended and may affect device reliability.
VCC average current Support with adequate margin the highest
averaged VCC current consumption value in
connected mode conditions specified in the SARA-
R4/N4 series Data Sheet
[1]
The maximum average current consumption can be
greater than the specified value according to the actual
antenna mismatching, temperature and supply voltage.
Section 1.5.1.2 describes current consumption profiles in
connected mode.
VCC peak current Support with adequate margin the highest peak
VCC current consumption value in Tx connected
mode conditions specified in the SARA-R4/N4
series Data Sheet
[1]
The maximum peak Tx current consumption can be
greater than the specified value according to the actual
antenna mismatching, temperature and supply voltage.
Section 1.5.1.2 describes current consumption profiles in
connected mode.
VCC voltage drop
during Tx slots
Lower than 400 mV VCC voltage drop directly affects the RF compliance with
applicable certification schemes.
Figure 6 describes VCC voltage drop during 2G Tx slots.
VCC voltage ripple
during Tx
Noise in the supply pins must be minimized High supply voltage ripple values during RF
transmissions in connected mode directly affect the RF
compliance with the applicable certification schemes.
VCC under/over-shoot
at start/end of Tx slots
Absent or at least minimized VCC under/over-shoot directly affects the RF compliance
with applicable certification schemes.
Figure 6 describes VCC voltage under/over-shoot.