1. Introduction
JTX 1612-GB is a complete standalone GNSS module. The module can simultaneously acquire and track multiple satellite constellations that include GPS, BEIDOU, GLONASS, GALILEO, QZSS and SBAS. It features low power and small form factor. Besides, it can provide you with superior sensitivity and performance even in urban canyon and dense foliage environment.
2. Features
_ Combines low power consumption and high sensitivity solution
_ Support GPS, BEIDOU, GLONASS, GALILEO and QZSS
_ Capable of SBAS (WAAS, EGNOS, MSAS, GAGAN)
_ Support 72-channel GNSS
_ Fast TTFF at low signal level
_ Up to 20 Hz update rate
_ Small form factor 16.0x12.2x2.2 mm
_ SMD type with stamp holes; RoHS compliant (lead-free)
_ ISO/TS 16949 certified sites, high quality control and fully tested on a system level.
3. Application
_ Personal positioning and navigation
_ Automotive navigation, model aircraft navigation
_ Marine navigation
4. Overview
4.1 Block Diagram
4.2 GNSS Performance
Chip HED
Frequency GPS, GALILEO, QZSS: L1 1575.42MHz, C/A code
BEIDOU: B1 1561.098MHz, C/A code
Channels Support 72 channels
Update rate 1Hz default up to 20HZ
Sensitivity GPS+BDS Tracking 162dBm (with external LNA)
Cold start 147dBm (with external LNA)
BDS Tracking 160dBm (with external LNA)
Cold start 144dBm (with external LNA)
Acquisition Time Hot start (Open Sky) < 1s (typical)
Cold Start (Open Sky) 28s (typical)
PositionAccuracy Autonomous 2.0m CEP
Max. Altitude < 18,000 m
Max. Velocity < 515 m/s
Protocol Support NMEA 0183 ver 3.0 115200 bps, 8 data bits, no parity, 1 stop bits (default)
1Hz: GGA, GSA, GSV, RMC, ZDA
4.3 Passive antenna application circuit diagram
4.4 Active antenna application circuit diagram
4.5 Pin assignment and descriptions (Top View)
Table 5-1 Pin descriptions
Pin# Name Type Description Note
1 RESERV Reserved,keep floating
2 NC No connect
3 1PPS O Time pulse (1PPS, default 100 ms pulse/sec when 3D fix is available)
4 NC No connect
5 NC No connect
6 NC No connect
7 NC No connect
8 RESERV Reserved, keep floating
9 VOUT P Power to external active antenna
10 Ground G Ground
11 RF_IN RF GNSS matched RF input, DC block inside.
12 Ground G Ground
13 Ground G Ground
14 NC No connect
15 RESERV Reserved, keep floating
16 NC No connect
17 NC No connect
18 RESERV Reserved, keep floating
19 RESERV Reserved, keep floating
20 TXD O UART, asynchronous output
21 RXD I UART, asynchronous intput
22 V_BCKP P Backup power input
23 VCC P Main power supply
24 GND G Ground
5. DC & Temperature characteristics
5.1 Absolute maximum ratings
Parameter Symbol Ratings Units
DC Supply Voltage VCC 3.6 V
Input Backup Battery Voltage V_BCKP 3.6 V
Operating Temperature Range Topr -40 ~ 85 ℃
Storage Temperature Range Tstg -40 ~ 85 ℃
5.2 DC Electrical characteristics
Parameter Symbol Conditions Min. Typ. Max. Units
Input Voltage VCC 3.0 3.3 3.6 V
Input Backup Battery Voltage V_BCKP 1.6 3.6 V
VCC_RF Output Voltage VOUT 3.3 V
Supply Iss VCC = 3.3V,
w/o active antenna,
Acquisition
Tracking *50
*35 mA
mA
Backup Battery Current Ibat Remove the power of VCC 9 uA
High Level Input Voltage VI H 0.7*VCC
(TBR) 3.6 V
Low Level Input Voltage VI L -0.3 0.4 V
High Level Output Voltage VOH 0.7*VCC
(TBR) VCC V
Low Level Output Voltage VOL 0.4 V
High Level Output Current IOH 2 mA
Low Level Output Current IOL 2 mA
*: (GPS+BDS) mode
5.3 Temperature characteristics
Parameter Symbol Min. Typ. Max. Units
Operating Temperature Topr -40 - 85 ℃
Storage Temperature Tstg -40 25 85 ℃
6 Mechanical specification
6.1 Outline dimensions
Symbol Min. (mm) Typ. (mm) Max. (mm)
W 12.13(TBR) 12.18(TBR) 12.22(TBR)
L 16.00(TBR) 16.06(TBR) 16.10(TBR)
H 2.18(TBR) 2.22(TBR) 2.24(TBR)
6.2 Recommended land pattern dimensions
Note:
The recommended land pattern dimensions are shown for reference only, as actual pad layouts may
vary depending on application.
发表于 2017-9-2 17:42:54
