u-blox SARA-G3 Series - Checklist for Migration

SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification Appendix
Page 190 of 218
LISA
NESTED APPLICATION BOARD
Top Layer and Solder Mask
LISA mounting option
with LISA Paste Mask
SARA
SARA mounting option
with SARA Paste Mask
ANT pad
Figure 70: Nested Design concept description: LISA and SARA modules alternatively mounted on the same application board
The voltage level of all the digital interfaces of SARA-G3 and LISA modules is 1.8 V: this allows the
direct connection from a 1.8 V external device (e.g. application processor) to all the modules.
The following sections explain in detail all the points to consider during the migration between LISA and
SARA designs, implementing or not a nested design
For further details regarding SARA-G3 and LISA characteristics, usage, or settings, refer to the relevant
module datasheet [1], [3], [4], [5], System Integration Manual [6], [7], and AT commands manual
[2], [8].
A.2 Checklist for migration
Have you chosen the optimal SARA-G3 series module?
For quad-band GSM/GPRS, full feature set, select the SARA-G350 module.
For quad-band GSM/GPRS, reduced feature set, select the SARA-G310 module.
For dual-band GSM/GPRS, reduced feature set, select the SARA-G300 module.
Check SARA-G3 series modules hardware requirements
Check power capabilities of the external supply circuit: SARA-G3 modules require large current
pulses in connected-mode as well as LISA-U series modules when a 2G call is enabled. LISA-
C2 series modules do not require large current pulses due to the CDMA channel access
technology.
Check supported bands for proper antenna circuit development: SARA-G3 modules frequency
ranges are within LISA-U modules ranges, but LISA-C2 modules range is quite different.
Check antenna detection requirements: SARA-G350 modules provide the antenna detection function
implementing an external application circuit between ANT_DET and ANT pins.
Check the module power-on requirements: Table 41Table 41 and relative section summarize
differences between SARA-G3 series and LISA modules.
Check the module requirements to enter low power idle-mode: SARA-G300 and SARA-G310
modules require a 32 kHz signal at EXT32K input, which for example can be provided by the
32K_OUT output.