Application Circuit - Globalsat EB-3531 User Manual

Application Circuit

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