SARA-N2 / N3 series - System integration manual
UBX-17005143 - R13
Design-in
Page 30 of 95
C1-Public
2
Design-in
2.1
Overview
For an optimal integration of SARA-N2 / N3 series modules in the final application board, follow the
design guidelines stated in this section.
Every application circuit must be properly designed to guarantee the correct functionality of the
related interface, however a number of points require higher attention during the design of the
application device.
The following list provides a ranking of importance in the application design, starting from the highest
relevance:
1.
Module antenna connection:
ANT
pin. Antenna circuit directly affects the RF compliance of the
device integrating a SARA-N2 / N3 series module with the applicable certification schemes. Very
carefully follow the suggestions provided in section
for schematic and layout design.
2.
Module supply:
VCC
and
GND
pins. The supply circuit affects the RF compliance of the device
integrating a SARA-N2 / N3 series module with applicable certification schemes as well as
antenna circuit design. Very carefully follow the suggestions provided in section
schematic and layout design.
3.
SIM interface:
VSIM
,
SIM_CLK
,
SIM_IO
,
SIM_RST
pins. Accurate design is required to guarantee
SIM card functionality and compliance with applicable conformance standards, reducing also the
risk of RF coupling. Carefully follow the suggestions provided in section
layout design.
4.
System function:
PWR_ON
,
RESET_N
,
VSEL
pins. Accurate design is required to guarantee that
the voltage level is well defined during operation. Carefully follow the suggestions provided in
section
for schematic and layout design.
5.
Other interfaces: UART interfaces, I2C-compatible interface, ADC and GPIOs. Accurate design is
required to guarantee proper functionality and reduce the risk of digital data frequency
harmonics coupling. Follow the suggestions provided in sections
and layout design.
