Locosys LS2003J-G Manual

Standalone gnss smart antenna module

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Product name

LS2003J-G

1 Introduction

LS2003J-G is a complete standalone GNSS smart antenna module, the module is powered by

MediaTek GNSS chip and it can provide user with superior sensitivity and performance even in urban canyon

and dense foliage environment.

The module includes embedded chip antenna and GNSS receiver circuits, dedicated designed for

tablet PC, MID, PND and smart phone that are going to integrate GNSS function.

2 Features

Tiny size: 16.0x12.2x2.8mm

MediaTek high sensitivity solution

Support 99-channel GNSS

Fast TTFF at low signal level

Built-in 12 multi-tone active interference canceller

Capable of SBAS (WAAS, EGNOS, MSAS, GAGAN)

Support GPS, GLONASS, GALILEO and QZSS

low power consumption

Fast TTFF at low signal level

±11ns high accuracy time pulse (1PPS)

Indoor and outdoor multi-path detection and compensation

SMD type with stamp holes; RoHS compliant

IATF 16949 quality control

Up to 10 Hz update rate

Support RTCM SC-104 Version-2.x(option)

3 Application

Personal positioning and navigation

Automotive navigation, model aircraft navigation

Marine navigation

Description

Standalone GNSS smart antenna module

LOCOSYS Technology Inc.

20F.-13, No.79, Sec. 1, Xintai 5th Rd.,

Xizhi Dist., New Taipei City 221, Taiwan

886-2-8698-3698

¬ 886-2-8698-3699

ßwww.locosystech.com/

Version

1.0

Page

1/23

Table of Contents

Summary of Contents for Locosys LS2003J-G

Page 1 Standalone GNSS smart antenna module 1 Introduction LS2003J-G is a complete standalone GNSS smart antenna module, the module is powered by MediaTek GNSS chip and it can provide user with superior sensitivity and performance even in urban canyon and dense foliage environment.
Page 2 LOCOSYS Technology Inc. 20F.-13, No.79, Sec. 1, Xintai 5th Rd., Xizhi Dist., New Taipei City 221, Taiwan 886-2-8698-3698 ¬ 886-2-8698-3699 ßwww.locosystech.com/ Fig 3-1 System block diagram. Fig 3-2 Typical application circuit that uses embedded antenna. 2/23 Page © 2018 LOCOSYS Technology Inc.
Page 3: Gnss Antenna
1,2,3, and 9 4.2 GNSS antenna The antenna type of LS2003J-G is chip antenna. Its performance is greatly affected by many factors, such as the size of PCB ground plane, installation position and its surrounding materials. In order to make it perform well and save user from reinventing the wheel, please consult our FAE before get started to design.
Page 4: Pin Assignment And Descriptions
Serial input for channel 0 (Default NMEA) VSTBY Backup battery supply voltage This pin is optional. DC supply voltage Ground <Note> The module doesn't have hot start when this pin and VCC pin are not applied. 4/23 Page © 2018 LOCOSYS Technology Inc.
Page 5: Dc Electrical Characteristics
High Level Output Current Low Level Output Current Note 1: This happens when downloading AGPS data to LS2003J-G. Note 2: Measured when position fix (1Hz) is available, input voltage is 3.3V and the function of self-generated ephemeris prediction is inactive.
Page 6 Xizhi Dist., New Taipei City 221, Taiwan 886-2-8698-3698 ¬ 886-2-8698-3699 ßwww.locosystech.com/ 7 Mechanical specification 7.1 Outline dimensions Symbol Min. (mm) Typ. (mm) Max. (mm) 12.1 12.2 12.3 15.9 16.0 16.6 7.2 Recommended land pattern dimensions 6/23 Page © 2018 LOCOSYS Technology Inc.
Page 7: Pcb Layout Suggestion
7.3.2 Installation position on the PCB The optimum PCB placement of LS2003J-G module is at the center of the top edge. But LS2003J-G can receive GPS signals from many directions so that it can be placed on the bottom side or top side.
Page 8 LOCOSYS Technology Inc. 20F.-13, No.79, Sec. 1, Xintai 5th Rd., Xizhi Dist., New Taipei City 221, Taiwan 886-2-8698-3698 ¬ 886-2-8698-3699 ßwww.locosystech.com/ 8/23 Page © 2018 LOCOSYS Technology Inc.
Page 9: Gga--- Global Positioning System Fixed Data
63.8 meters Units meters Geoid Separation 15.2 meters Units meters Age of Diff. Corr. second Null fields when DGPS is not used Diff. Ref. Station ID Checksum <CR> <LF> End of message termination 9/23 Page © 2018 LOCOSYS Technology Inc.
Page 10: Gll--- Geographic Position - Latitude/Longitude
$GLGSA,A,3,88,87,65,84,71,,,,,,,,1.10,0.78,0.78*18 Table 8.1-5 GSA Data Format Name Example Units Description Message ID $GPGSA GSA protocol header, GP means GPS & GL means GLONASS Mode 1 See Table 8.1-6 Mode 2 See Table 8.1-7 10/23 Page © 2018 LOCOSYS Technology Inc.
Page 11: Gsv---Gnss Satellites In View
Channel 1 (Range 01 to 196) GPS Satellites ID : 01~32, SBAS Satellites ID : 33~64, GLONASS Satellites ID : 65~96, & QZSS Satellites ID : 193~196 Elevation degrees Channel 1 (Range 00 to 90) 11/23 Page © 2018 LOCOSYS Technology Inc.
Page 12: Rmc---Recommended Minimum Specific Gnss Data
Date 160415 ddmmyy Magnetic variation degrees (Not shown) Variation sense E=east or W=west (Not shown) A=autonomous, D=DGPS, E=DR, N=Data not valid, Mode R=Coarse Position, S=Simulator Checksum <CR> <LF> End of message termination 12/23 Page © 2018 LOCOSYS Technology Inc.
Page 13 200uA current. GNSS module will be awaked when receiving any byte. The following flow chart is an example to make GNSS module go into standby mode and then wake up. 13/23 Page © 2018 LOCOSYS Technology Inc.
Page 14: Periodic Mode
Its status of power consumption is as below chart. The following flow chart is an example to make GNSS module go into periodic mode and then back to normal operation mode. 14/23 Page © 2018 LOCOSYS Technology Inc.
Page 15 CPU does not need to control GNSS module until the host CPU needs the GNSS position data. The following flow chart is an example to make GNSS module go into AlwaysLocate mode and then back to normal operation mode. Note: AlwaysLocate is a trade mark of MTK. 15/23 Page © 2018 LOCOSYS Technology Inc.
Page 16: Data Logger
SRAM that is powered through VBACKUP pin. Once it drains out, the default/factory settings will be applied. Due to the transmitting capacity per second of the current baud rate, GNSS module has to 16/23 Page © 2018 LOCOSYS Technology Inc.
Page 17 Interval of position fix Software command Every 100ms (10Hz) $PMTK220,100*2F<CR><LF> Every 200ms (5Hz) $PMTK220,200*2C<CR><LF> Every 500ms (2Hz) $PMTK220,500*2B<CR><LF> Every 1000ms (1Hz) $PMTK220,1000*1F<CR><LF> 17/23 Page © 2018 LOCOSYS Technology Inc.
Page 18 The format of the software command is as below. $PMTK386,speed threshold*checksum<CR><LF> The unit of speed threshold is meter per second. The range of speed threshold is from 0.1m/s to 2.0m/s. Value 0 is to disable the function. 18/23 Page © 2018 LOCOSYS Technology Inc.
Page 19: Recommended Soldering Temperature Profile
240 Celsius. Lead-free Processes Lead –Free Solder Paste (Sn 96.5-Ag 3.0-Cu 0.5) Cycle Interval: 300 sec Note: module should be soldered on the topside in the soldering process to prevent from LS2003J-G falling down 19/23 Page © 2018 LOCOSYS Technology Inc.
Page 20 LOCOSYS Technology Inc. 20F.-13, No.79, Sec. 1, Xintai 5th Rd., Xizhi Dist., New Taipei City 221, Taiwan 886-2-8698-3698 ¬ 886-2-8698-3699 ßwww.locosystech.com/ 10 Reel Packing information 20/23 Page © 2018 LOCOSYS Technology Inc.
Page 21: Packing And Handling
GNSS modules, like any other SMD devices, are sensitive to moisture, electrostatic discharge, and temperature. By following the description sketched in the document for LOCOSYS GNSS module storage and handling, it is possible to reduce the chances of them being damaged during production.
Page 22: Moisture Sensitivity
GNSS modules in dry places such as dry cabinet. The approximate shelf life for LOCOSYS GNSS modules packages is 6 months from the bag seal date, when store in a non condensing storage environment (<30°C/60% RH) 11.3 ESD Handling...
Page 23: Document Change List
LOCOSYS Technology Inc. 20F.-13, No.79, Sec. 1, Xintai 5th Rd., Xizhi Dist., New Taipei City 221, Taiwan 886-2-8698-3698 ¬ 886-2-8698-3699 ßwww.locosystech.com/ Document change list Revision 1.0 First release on November 30, 2018 23/23 Page © 2018 LOCOSYS Technology Inc.