USGlobalsat EB-5631RE - Manual (Page 7)

2012/7/30 - 7 -
Application
Application Circuit
VBAT
C10
10UF
RESET
GPIO
1PPS OUTPUT
ON_OFF
WAKE_UP
I2C_SDA
I2C_SCL
L5
CHOKE RF
GPS_ANTENNA
1
C11
CAP NP C12
CAP NP
50ohm LINE
R8
2K2/NC
R9
2K2/NC
1V8 1V8 GPS_3V3
RXD
TXD
GPS_3V3
M1
EB-5631RE
RF IN
1
GND
2
GND
3
GND
4
VBAT
5
GND
6
NC
7
GND
8
GND
9
GND
10
VCC
11
GN
D
12
R
ESET
13
GN
D
14
GN
D
15
EC
LK
16
GN
D
17
GPI
O
18
GND
19
TIMEMAEK
20
GND
21
GND
22
GND
23
GND
24
ON_OFF
25
GND
26
WAKE_UP
27
GND
28
GND
29
T
XD
30
R
XD
31
D
R
_I
2C
_D
IO
32
GN
D
33
D
R
_I
2C
_C
LK
34
GN
D
35
GN
D
36
C7
10UF
R2
10K/NC
R7
10K
50 Ohm Micro strip line
GPS Active Antenna Specifications (Recommendation)
Frequency: 1575.42 + 2MHz Amplifier Gain: 18~22dB Typical
Axial Ratio: 3 dB Typical Output VSWR: 2.0 Max.
Output Impedance:
50Ω
Noise Figure: 2.0 dB Max
Polarization: RHCP Antenna Input Voltage: 3.3V (Typ.)