Globalsat EB-3531 - Application Circuit

EB-3531
Specifications are subject to be changed without notice.
Page 6 of 21
Version 1.2.1
 Application Circuit
VIN
C3
470PF
GPS_3V3
MS518S-FL35E
BATTERY
12
C6
0.1UF
1 2
A1
GPS_ANTENNA
1
GPS POWER
C1
22UF/10V
L4
BLM18AG121SN1D
D1
RB521S
M1
EB-3531
1
2
3
4
5
21
6
7
8
9
10 11
12
13
14
15
22
16
17
18
19
20
RXB
TXB
1PPS
TXA
RXA
GND
NC
GPIO0
GPIO1
RF_PWR
ON_OFF VBAT
VCC
GPIO13
GPIO14
GPIO15
GND
BOOTSEL
VCC_RF
GND
RF_IN
GND
R6
270R
1 2
U1
XC6209B332MRN 3.3V
1
2
43
5
VIN
GND
NCCE
VOUT
C2
10UF/16V
GPS_3V3
C5
1UF
1 2
L3
BLM18AG121SN1D
GPS_3V3
TXA
C7
10UF
D2
RB512S
RXA
L1
BLM18AG121SN1D
GPS Active Antenna Specifications (Recommendation)
Frequency: 1575.42 + 2MHz
Axial Ratio: 3 dB Typical
Output Impedance: 50
Polarization: RHCP
Amplifier Gain: 18~22dB Typical
Output VSWR: 2.0 Max.
Noise Figure: 2.0 dB Max
Antenna Input Voltage: 2.85V (Typ.)