User's Manual

LE910 Hardware User Guide
1vv0301089 Rev.7 – 25-10-2015
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 49 of 88
7 GNSS Receiver
The LE910 module is integrating a GNSS receiver that could be used in Autonomous or in A-GPS
(assisted GPS) mode.
The LE910 module includes an embedded LNA (13.5dB gain typ.) with front-end filter and inter-stage
filter in order to connect directly a passive antenna connected to ANT_GNSS pad.
In case of external antenna connection, proper DC-decoupling and ESD protection must be inserted to
ANT_GNSS pad.
NOTE:
LE910 doesn’t support external LNA
7.1 Receiver Characteristics
Cold Start Sensitivity
-145 dBm
Hot Start Sensitivity
-156 dBm
Tracking Sensibility
-161 dBm
Navigation Sensitivity
-159 dBm
TTFF (Cold Start)
31.5 s
TTFF (Hot Start)
1.3 s
Position Accuracy
0.4 m (CEP 100, static scenario, -130dBm, hot start)
7.2 GNSS Signals Pinout
The Pads related to this function are the following:
PAD
Signal
I/O
Function
Type
R9
ANT_GNSS
I
GNSS Antenna (50 ohm)
RF