User's Manual

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LTE Module
EC25-A User Manual
EC25-A_User_Manual Confidential / Released 49 / 7
Table 24: Pin Definition of GNSS Antenna
Pin Name
Pin No.
I/O
Description
Comment
ANT_GNSS
47
AI
GNSS antenna
50ohm impedance
Table 25: GNSS Frequency
Type
Frequency
Unit
GPS/Galileo/QZSS
1575.42 ± 1.023
MHz
GLONASS
1597.5 ~ 1605.8 MHz
BeiDou
1561.098 ± 2.046 MHz
The reference design of GNSS antenna is shown as below.
GNSS
Antenna
VDD
Module
ANT_GNSS
47nH
10R
0.1uF
100pF
NM
NM
Figure 28: Reference Circuit of GNSS Antenna
1. You can choose an external LDO to supply power according to the active antenna.
2. If you design the module with passive antenna, the VDD circuit is not needed.
NOTES