7.2
External LNA
External LNA means a passive antenna used with an LNA on the same PCB than Teseo-LIV4F module.
There is built-in LNA and SAW in the GNSS module. It is recommended to use an LNA with gain less than 36 dB
and noise figure less than 1.5 dB.
Here is a bloc diagram describing the connection:
Figure 5.
External LNA control
LNA
VCC
LIV4F
10
11
12
13
14
15
16
17
18
9
8
7
6
5
4
3
2
1
RESETn
VCC
VBATT
EXTINT
PPS
UART_RX
B0/UART_TX
GND
GND RF
RF IN
GND RF
Reserved
VCC RF
Reserved
SDA
SCL
PRTRG
Reserved
UM3004
External LNA
UM3004
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Rev 1
page 10/17
