SARA-R5 series - System integration manual
UBX-19041356 - R04 Design-in Page 93 of 118
C1-Public
2.8.2 Guidelines for general purpose input/output layout design
The general purpose input / output pins are generally not critical for layout.
2.9 Reserved pin (RSVD)
SARA-R5 series modules have a pin reserved for future use, marked as RSVD. This pin is to be left
unconnected on the application board.
2.10 Module placement
An optimized placement allows minimum RF lines’ length and closer path from DC source for VCC.
Make sure that the module, analog parts and RF circuits are clearly separated from any possible
source of radiated energy. In particular, digital circuits can radiate digital frequency harmonics, which
can produce electro-magnetic interference that affects the module, analog parts and RF circuits’
performance. Implement suitable countermeasures to avoid any possible electro-magnetic
compatibility issue.
Make sure that the module is placed in order to keep the antenna (or antennas, for SARA-R510M8S)
as far as possible from VCC supply line and related parts (refer to Figure 29), from high speed digital
lines (as USB) and from any possible noise source.
Provide enough clearance between the module and any external part: clearance of at least 0.4 mm per
side is recommended to let suitable mounting of the parts.
☞ The heat dissipation during continuous transmission at maximum power can raise the
temperature of the application base-board below the SARA-R5 series modules: avoid placing
temperature sensitive devices close to the module.
To Next Page
Loading...
Need help?
General
