Integration Manual

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R13 System description Page 18 of 119
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.
Table 6: Summary of VCC modules supply requirements