Ublox SARA-R422 User Manual

SARA-R4 series - System integration manual
UBX-16029218 - R20 System description Page 22 of 128
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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 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-R410M:
3.2 V / 4.2 V
SARA-R412M / -R422 / -R422S / -R422M8S:
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-R410M:
3.0 V / 4.2 V
SARA-R412M/ -R422 / -R422S / -R422M8S:
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 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
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 9 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 9 describes VCC voltage under/over-shoot.
Table 6: Summary of VCC modules supply requirements

Ublox SARA-R422 Specifications

General

Brand	Ublox
Model	SARA-R422
Category	Control Unit
Language	English