GPS Receiver A1037
Contents
1. Pin Description in Typical Max 33V ee O 1 Input current in standby mode 20uA max value at min temperature 300pA 4 1PPS 1 pulse per second reference GPS time as ee VANT active antenna supply voltage Antenna current 13 ANT antenna pin BOQ Output pins VOH Vcc VOL 0 8V 0 4V Input pins VIH 2 0V VIL Table 6 Operating Conditions 6 2 Absolute maximum ratings Symbol Parameter Min Max Unit Vcc Power supply 0 3 3 6 V lov Absolute sum of a input curente during overad conditor 200 mA Tsi Storage temperature 40 125 a a O LT Table 7 Absolute maximum ratings Stresses beyond those listed under Absolute Maximum Ratings may cause per manent damage to the device This is a stress rating only Functional operation of the device at these or any other conditions beyond those indicated in the opera tional sections of this specification is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability V2 0 03 07 User s Manual Page 17 of 29 GPS Receiver A1037 A E Tyco Electronics 7 Mounting This chapter covers the mounting of the A1037 A 7 1 Proposed Footprint for Soldering The following proposal of a footprint for soldering is assuming a stencil thickness of 150um X marks the center of the through holes A103 A I Solder n paste Figure 8 Soldering footprint proposal A1037 A 0 45 P2. ENABLE GND GND Figure 13 Application note Antenna current limiter Page 24 of 29 User s Manual V2 0 03 07 GPS Receiver T A1037 A Tyco Electronics 10 4 1PPS pin 1 pulse per second pin The 1PPS pin is an output pin In addition to precise positioning GPS also allows for accurate timing due to the synchronized atomic clocks in the GPS satellites While the current date and time is transmitted in NMEA sentences an exact and accurate timing signal is provided via the 1PPS pin of the A1037 modules 10 5 Reset Signal The nRST pin is an input pin The nRST pin can be used to generate a reset on the A1037 A module Resetting the module will result in a restart of the complete firmware All information stored in SRAM will still be valid 10 6 Battery Back up This application note describes on how to back up the RTC and the SRAM of the GPS receiver module The basic of the first examples is to provide a back up by a separate battery or a supercap Here it has to be considered that the RTC is only backed as long as the voltage on the Vbak pin is higher than 2 9V While the supercap is charged thru the module during normal operation the bat tery primary cell is decoupled thru a diode ESI pq Vbak UN inn a ra E JOll cuo 4 3 GNDq Figure 14 Application note Module back up An alternative to this solution is to switch the supply voltage from the Vcc
3. Tyco Electronics GPS Receivers A1037 A A description of Tyco Electronics GPS module A1037 A User s Manual Version 2 0 Hardware Revision 01 Tyee Electronics This page was intentionally left blank Revision History z Tyco Electronics Revision History Rev Date Description gt gt 1 1 1 1 11 10 06 Initial Draft 08 09 06 _ Final product specification implemented 1 2 09 22 06 Minor changes storage temperature spell check Packaging details added 11 28 06 Additional info Connection of RF Signal 12 08 06 Application not antenna current limiter 1 6 03 14 07 Some minor changes 03 20 07 _ mm dd yy V2 0 03 07 User s Manual Page 3 of 29 Disclaimer E Tyco Electronics Disclaimer THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF TYCO ELEC TRONICS CORPORATION POWER SYSTEMS TYCO ELECTRONICS IT MAY NOT BE COPIED OR TRANSMITTED BY ANY MEANS PASSED TO OTHERS OR STORED IN ANY RETRIEVAL SYSTEM OR MEDIA WITHOUT PRIOR CONSENT OF TYCO ELECTRONICS OR ITS AUTHORIZED AGENTS THE INFORMATION IN THIS DOCUMENT IS TO THE BEST OF OUR KNOWLEDGE ENTIRELY CORRECT HOWEVER TYCO ELECTRONICS CAN NEITHER ACCEPT LIABILITY FOR ANY INACCURACIES OR THE CONSEQUENCES THEREOF NOR FOR ANY LIABILITY ARISING FROM THE USE OR APPLICATION OF ANY CIRCUIT PRODUCT OR EXAMPLE SHOWN IN THE DOCUMENT THE PRODUCT HARD AND SOFTWARE DESCRIBED IN THIS DOCUMEN TATION IS NOT AUTHORIZED FOR US
4. 49 89 6089 838 Fax 49 89 6089 835 gps tycoelectronics com www tycoelectronics com gps Further contact addresses info gos tycoelectronics com support gps QOtycoelectronics com sales gos tycoelectronics com 12 2 Related Documents e Manual T E GPS Firmware A1037 A TYCO e Manual T E GPS Evaluation Kit EVA1037 A TYCO V2 0 03 07 User s Manual Page 27 of 29 GPS Receiver A1037 A Tyco Electronics Page 28 of 29 User s Manual V2 0 03 07 Lists of Tables T and Figures Tyco Electronics 13 List of Tables Table TE ATO Cmaractetisll Soupe t epo IHR THO DNUP REPARUPO EPUM PUPRSORn M NM UN INI IU UPS 8 Table 2 A1037 A dimensions and WEIGNL ccccecceecseeceeeseeceeeeeeseeeeeeseeaeeseeaeeees 8 Table 3 Aadiliorial SQUIDIMEN eniccscescesccreenesrnneennaarsasenernesosatenseenearenmntenanannns 10 Table 4 NMEA configuration c cccceccceeececeeeeceeeceeeseeeceeeseeeseeeeeeseeeseeeseeeaeesanes 12 Table S Pin description ANOS S Losesesdvese vuvu RUE UTR ERR VESNPEEEPEFIUNUEVUPITE KETTE RES FEET iri 15 Table 6 Operating Conditions 1 seeseeesesssesseeseeeneee nennen nnns 17 Table 7 Absolute maximum ratings cece ccc eccseeceeeeeeseeeeeeeeeseeeeeeseeeeeeaeeseeeaeeaees 17 Table 8 Reflow soldering profile A103 7 A ccccccccceccceccceeeseeeseeeeeeeeeeseeseeeaeeeaees 18 Table 9 Environmental conditions ccc cccecceccecceeceece eee eeeeeeeeseeee
5. within the standard GPS firmware is e Serial 0 NMEA 4800 baud 8 data bits no parity 1 stop bit no flow control 3 4 Improved TTFF In order to improve the TTFF Time To First Fix it is recommended to support the RTC with a back up super capacitor supercap or a battery when no system power is available If the system or the GPS receiver alone should not be backed up it is possible to support the restart procedure by providing position and date time information to the module This is described in the firmware manual Please refer there to chapter Start up Support in the document T E GPS Firmware A1037 Page 12 of 29 User s Manual V2 0 03 07 GPS Receiver A1037 A T Tyco Electronics 4 Mechanical Outline 4 1 Details Component Side A1037 A 16 24 64 14 47 57 13 20 52 11 93 47 10 66 42 9 39 37 8 12 32 6 85 27 5 58 22 4 31 17 3 04 12 1 77 07 0 00 00 All dimensions in mm inch V2 0 03 07 Figure 5 Mechanical outline component side A1037 A User s Manual C 14 47 57 C 11 93 47 E T4 10 66 42 939 37 0 00 00 19 05 75 Page 13 of 29 GPS Receiver A1037 A E Tyco Electronics 4 2 Details Solder Side A1037 A M m e EB em Din au 7 46 m x m a e c 9 e x eu C T D A e te S 0 19 05 Solder pad size 1 4 x 0 9 All dimensions in mm Figure 6 Mechanical o
6. AEG sass eco sue cine die dine dt cle sees do amu eniee eee wone dest wecewectacdeslaenncecteaeaacseay 19 8 1 Connection of RF Signal esseessssssssssssessseeeee nennen nnne nnn n 19 8 2 Active Antenna Eee ence Voy exei s 20 9 Quality and Reliability eese eee Lesser ee eee eene nenne nnn n annnm 21 9 1 Environmental Conditions cccccccccsecseeteeesseteeeeeeteeeeeeeeeteeeeeeteeeeeneeseeeaes 21 9 2 Product Qu alficatl NM RP 21 2 urere ee EE E E 21 TO Applications and Hints etc 22 10 1 Minimum C onngur aO acesacicgeeseniatasccdzeedandegzedontsasesonerovedsedyeedanisanedesosmedesed 22 10 2 Antenna Status Adaptation ccccccccecceccseeceeceeeceeeeeeeseeeeeeeeeeeeeeseeneeaeeees 22 10 2 1 Antennas with Different Current Draw ccccccccccceeeseeeeeeeeeeeeeeeeeteeeteeeneeaneeaaees 22 10 2 2 Antennas with Different Current Draw incl Current Limiter 23 V2 0 03 07 User s Manual Page 5 of 29 Tz Tyco Electronics Table of Contents E Tyco Electronics 10 3 VANT Pin antenna voltage input PIN cc ececceecceeeceeeseeeaeeeeeeeeeeeeeeseeeaes 24 10 4 1PPS pin 1 pulse per second PIN ccc cecceeceeceeeeeeeeeceeeeeeteeeeeeseeneeeeeeees 25 10 5 Reset SIC IIA M 25 O CBIN BaCk m 25 11 Demonstration Kits ccccceeeseeseeeeeeeeenseenssenseeesee
7. E IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF TYCO ELEC TRONICS THIS DOCUMENT MAY PROVIDE LINKS TO OTHER WORLD WIDE WEB SITES OR RESOURCES BECAUSE TYCO ELECTRONICS HAS NO CONTROL OVER SUCH SITES AND RESOURCES TYCO ELECTRONICS SHALL NOT BE RESPONSIBLE FOR THE AVAILABILITY OF SUCH EXTERNAL SITES OR RESOURCES AND DOES NOT ENDORSE AND IS NOT RESPONSIBLE OR LIABLE FOR ANY CONTENT ADVERTISING PRODUCTS OR OTHER MATERIALS ON OR AVAILABLE FROM SUCH SITES OR RESOURCES TYCO ELECTRONICS SHALL NOT BE RESPONSIBLE OR LIABLE DIRECTLY OR INDIRECTLY FOR ANY DAMAGE OR LOSS CAUSED OR ALLEGED TO BE CAUSED BY OR IN CONNECTION WITH USE OF OR RELIANCE ON ANY SUCH CONTENT GOODS OR SERVICES AVAILABLE ON OR THROUGH ANY SUCH SITE OR RESOURCE TYCO ELECTRONICS RESERVES THE RIGHT TO CHANGE MODIFY OR IMPROVE THIS DOCUMENT OR THE PRODUCT DESCRIBED HEREIN AS SEEN FIT BY TYCO ELECTRONICS WITHOUT FURTHER NOTICE Page 4 of 29 User s Manual V2 0 03 07 Table of Contents Table of Contents 1 Introduction p NR 7 RE T 1 2 Characteristics eee 8 To RANOMI FOC AU ON See E OTT 8 2 Ordering Information x9 2d 2509 5081 280 8000508 061 vu Sacr unc UE d V aU I Res CER UE SUE 9 21 PS Receiver A 1095 7 A eee iet viia e ia viia A MI MPTUIUT PEINT PIU 9 ANLE AC curo mNET S 9 2 2 1 Packaging of the A T09 f Jean enenatis ntx cen o uo F Has sunnan Inacev uade ab ltem tete Esau
8. NT If the antenna requires a different supply voltage the antenna bias can be provided through the VANT pin Page 20 of 29 User s Manual V2 0 03 07 GPS Receiver A1037 A T Tyco Electronics 9 Quality and Reliability 9 1 Environmental Conditions 30 70 C MSL JEDEC Moisture Sensitivity Level Table 9 Environmental conditions 9 2 Product Qualification Prior to product qualification the GPS receiver is preconditioned according to EIA JEDEC standard JESD22 A113 B Level 3 Basic qualification tests MSL Classification according to J STD 020C MSL3 245 C MSL Rework Compatibility according to J STD 020C Temperature Cycling 30 C 70 C Temperature Humidity Bias 70 C 85 RH High Low Temperature Operating 30 70 C High Temperature Operating Life 70 C Vibration Variable Frequency Mechanical Shock Please contact Tyco Electronics for detailed information 9 3 Production Test Each module is electrically tested prior to packing and shipping to ensure state of the art GPS receiver performance and accuracy V2 0 03 07 User s Manual Page 21 of 29 GPS Receiver A1037 A E Tyco Electronics 10 Applications and Hints 10 1 Minimum Configuration Please refer to chapter 3 1 Minimum Configuration for details In addition for opti mized start up behavior it is strongly recommended to add a battery back up circuit see chapter 3 4 10 2 Antenna Status Adaptation This chapt
9. acteristics The modules are characterized by the following parameters Channels 12 parallel tracking Frequency SL 1575 MHz 3m CEP SA off Time To First Fix TTFF 1s theoretical minimum values 3s values in real world may differ 32s 60s Table 1 A1037 characteristics 1 The calibrated clock of the receiver has not stopped thus it knows precise time to the us level 2 The receiver has estimates of time date position and valid almanac and ephemeris data 3 The receiver has estimates of time date position and recent almanac 4 The receiver has no estimate of time date position and no recent almanac 5 To improve TTFF the receiver allows setting of time date position almanac and ephemeris A1037 A Mechanical dimen Length 19mm 0 75 sions Width 16 24mm 0 64 Height 2 4mm 0 095 A1037 A Weight 1g lt 0 050z Table 2 A1037 A dimensions and weight 1 3 Handling Precautions The GPS receiver module A1037 A is sensitive to electrostatic discharge ESD Please handle with appropriate care Page 8 of 29 User s Manual V2 0 03 07 GPS Receiver A1037 A z Tyco Electronics 2 Ordering Information 2 1 GPS Receiver A1037 A The order number is built as follows e V23993A1037A V23993 stands for Tyco Electronics wireless and communication products A1037A for the A1037 A module 2 2 Packing 2 2 1 Packaging of the A1037 A The A1037 A GPS module comes in a tape and re
10. ao ian pO RUE 9 2 3 Additional Equipment cccccccccecceeceeceeseeteeseeceeeaeeeeeaeeeeeseeseeseeseeceeseeseesaeeas 10 S QUICK SIdE Laudo cece sale uoa dci das denn dU D GI NICE GI M MM CENE CE 11 3 1 Minimum Configuration cece cece cece eee eee eece cece eeaeeeaeeceeeseeeseeeseeeseeesueeeeeseess 11 SPA SRI RIS MNT A 12 QUO SBITOL ON SEUNG S ese deni cocto eint demi dia deni ema etu E E teet cue E AE ES 12 KAMP fero E RR 12 A eiie OUE orara n E 13 4 1 Details Component Side A1037 A 0 nonnanonnennnnsnnnnsrrnnsrreronrerrnrsrrnrnrrrrrrrerrn 13 4 2 Details Solder Side A1037 A eee nennen nnnm nens 14 5 Pin out Information eeLeel eeclesie leerleenieee nennen nnn n annnm nan 15 om E00 oor ee ee 15 32 Wi t fel gi eile ae uie eae 2 in aren ee o c m 15 o9 General COMMONS Ar EE EE 16 6 Electrical Characteristics ios vuacs usesucnilac uude ue ncn vcuivensusesesasuduiususesudasveddsiueudwaus 17 60 1 Operating ONGING NS DN TO E 17 6 1 1 ADSODUFe maximum FUNG Sct cee ce Scares cutesecaieewacecevateeecanconadiiedicu avannnacdseeutneseecadateiuiesaen 17 T MOUDUNO psi erceesae ieee onreeaeieta et seetoas EE ecanuetenuescecocenuestocstectrestxectneetas 18 7 1 Proposed Footprint for Soldering ccccccecseeceecseeceeeeeeseeteeeeeeteeeeeseeteeeaess 18 7 2 Recommended Profile for Reflow Soldering seeseeusse 18 o Use ol
11. d plane of the PCB the ground plane is on a lower PCB layer by via as demonstrated in the drawing CIND IU CNOWyY Vias to Vias to Solder pads Top layer GND layer Figure 9 Antenna connector strip line A1037 A Solder pads In order to gain the impedance of 50 the width of the strip line needs to be calcu lated It depends on the thickness or height of the PCB layer both parameters are shown in following drawing For our calculation we assume that the PCB material is FR4 909 strip line GPS Module Motherboard AntGND Figure 10 Strip line parameters A1037 A In this case the width should be about 1 8 times the height of the PCB W 1 8 x H In our example we would get a width of W 1 8 x 0 8mm 1 44mm V2 0 03 07 User s Manual Page 19 of 29 GPS Receiver A1037 A E Tyco Electronics 8 2 Active Antenna General GPS active antenna specification Limitations e Supply voltage according to voltage fed into VANT pin 5V max e Supply current 50mA max Recommendations e Gain 2 20dB should not exceed 35dB e Noise figure lt 1 5dB The recommendations apply to the majority of active antennas that can be found in the market Anyhow the quality of the GPS antenna chosen is of paramount impor tance for the overall sensitivity of the GPS system The system design needs to reflect the supply voltage of the antenna If the supply voltage is equal to Vcc Vcc can be connected to VA
12. el package suitable for pick and place machines A dL 271 9301 DO 10xPO 40 0 2 r A 15 7 95057 Figure 2 A1037 A tape specifications 1 V2 0 03 07 User s Manual Page 9 of 29 Tq Electroni GPS Receiver yco Electronics iun 0 2 0 05 Figure 3 A1037 A tape specifications 2 2 3 Additional Equipment V23993EVA1037A Evaluation Kit including one module V23993A1037A Table 3 Additional equipment A detailed description of the additional kit can be found in the according manuals Page 10 of 29 User s Manual V2 0 03 07 GPS Receiver I A1037 A Tyco Electronics 3 Quick Start In order to allow an easy and quick start with the modules A1037 A this chapter provides a short overview on the most important steps to receive NMEA messages with position information on a serial port 3 1 Minimum Configuration The following picture shows a recommended minimum configuration for NMEA out put and commands sent and received via an RS232 interface based on the GPS module A1037 A Vcc 3 3V Battery SUBD9M RS232 Driver Figure 4 Recommended minimum configuration A1037 A Remarks e Place C2 to C6 close to SP3222 For capacity values see datasheet of actual component used Use 3 3V level shifter SP3222 or equivalent Use separate ground plane for antenna ground Antenna input impedance is 50Ohm Match as close as p
13. er shall give assistance in designing a circuit for detecting if an antenna is connected to the module The information about the antenna status can be de rived from the ANTSTAT signal generated by this circuit The examples use values for components that roughly result in the following ANTSTAT output e Logic low when lant lt 9mA e Logic high when 9mA gt lant lt 16mA e logic low when lant gt 16mA 10 2 1 Antennas with Different Current Draw The following circuit is a proposal on how you can feed an antenna with 3 3V and provide an output for the ANTSTAT pin The value of the components may need an adaptation in the final application For example the input current of the chosen comperator goes into that equation The thresholds defined in this circuit are quite close to the ones described above Their value is determined by resistors R4 R5 and R3 We strongly recommend simulating and testing your realized version before using it In any case it is the responsibility of the designer to test and verify the implemen tation Page 22 of 29 User s Manual V2 0 03 07 GPS Receiver A1037 A T Tyco Electronics U1 U2 rail to rail single supply Common node on PCB comperator with open drain output ANTSTAT Output open drain with pullup R2 High for 8m lt lant lt 18mA Low for lant lt 8mA or lant gt 18mA Figure 11 Application note Antenna sensor adaptation 10 2 2 Antennas with D
14. eseeseeeeeseeseeseeeees 21 14 List of Figures FOUET AT S 7214 ett tee E ne eee ee T Figure 2 A1037 A tape specifications 1 cccceccceccseeeeeeeeeeteeeseeeseeeseeeeeeseeeaeeenes 9 Figure 3 A1037 A tape specifications 2 eeeseeseeeeseeneeereenenn nn 10 Figure 4 Recommended minimum configuration A1037 A 11 Figure 5 Mechanical outline component side A1037 A eeeeeeeeeese 13 Figure 6 Mechanical outline solder side A1037 A eeeseeeeeeeeeeeeeeee 14 Figure 7 Pin out information A1037 A cccccccceecceccceeeseeeeeeseeeseeeseeeeeeeseeeeeseeees 15 Figure 8 Soldering footprint proposal A1037 A cccccccecceesseeeeeeeeteeeeeneeeeeeaeees 18 Figure 9 Antenna connector strip line A1037 A eeeeeeeeeeeeneereee 19 Figure 10 Strip line parameters A1037 A cccccccecceccsseceeeeeeseeeeeeaeeteeeeeenseseeaeees 19 Figure 11 Application note Antenna sensor adaptation 23 Figure 12 Application note Antenna sensor adaptation with current limiter 23 Figure 13 Application note Antenna current limiter ssssse 24 Figure 14 Application note Module back up eeeeeeeeeeeeeeeeeeeeeee 25 V2 0 03 07 User s Manual Page 29 of 29
15. esoessonsseaseneseeseonssonssoasenass 26 UB Ee VIATOR GOB A M 26 12 R lated Informal h sssi a a 27 ALCO aE IE E EE 27 122 Ixelated DOCUMEN oorner ra E E EAE E 2 13 List of Tables RTT 29 TA LISTO RIOU GS oaie E 29 Page 6 of 29 User s Manual V2 0 03 07 GPS Receiver T A1037 A Tyco Electronics 1 Introduction Tyco Electronics GPS module A1037 A is a highly integrated GPS receiver module that can be used as an SMT component It is capable to receive signals from up to 12 GPS satellites and transferring them into position and timing information that can be read over a serial port This new generation of GPS module combines small size and high end GPS functionality at low power consumption Operable at 3 3V 50mA typ 1fix per second Small form factor of 19 x 16 2 mm 0 75 x 0 64 Cost effective antenna input Single sided SMD component for reflow soldering Tape amp reel packaging The A1037 A GPS receivers are available as off the shelf components 100 tested and shipped in standard tape and reel package 1 1 Label The A1037 A label holds the following information Hardware rr Hardware Ausgabe Hardware Release Software tt Software Release sss Software Version Datecode and Location BZ Munich YK Bicske ww Woche week yy Jahr Year Figure 1 A1037 A label V2 0 03 07 User s Manual Page 7 of 29 GPS Receiver A1037 A E Tyco Electronics 1 2 Char
16. ifferent Current Draw incl Current Limiter This proposal is similar to the first one but includes a current limiter Comments and notes as above apply We strongly recommend simulating and testing your realized version before use In any case it is the responsibility of the designer to test and verify the implementation Ui U2 rail to rail single supply Common node on PCB comperator with open drain output Output open drain with pullup R2 High for m lant 18mA Low for lant 9mA or lant gt 18mA Figure 12 Application note Antenna sensor adaptation with current limiter V2 0 03 07 User s Manual Page 23 of 29 GPS Receiver A1037 A E Tyco Electronics 10 3 VANT Pin antenna voltage input pin The VANT pin is an input pin The supply voltage for an active GPS antenna has to be fed into the Vant pin The easiest way to do that is to connect Vcc to VANT The maximum current is SOMA Note Shortcut between ANT and GND may damage the A1037 A GPS receiver module This should be avoided by using an antenna current limiter Please find proposal for simple current limiter below If other transistors are used other resistor values may be necessary as well We strongly recommend simulating and testing your realized version before using it The little schematics below work for Vcc from 3V to 5V The antenna current will be limited to around 50mA v50 4E gE amp E DOO Q6 BC858C VANT
17. lease note that copper and solder paste footprint are identical The final footprint has to be evaluated and qualified by the manufacturer according to the specific processes 7 2 Recommended Profile for Reflow Soldering Typical values for reflow soldering of the module in convection or IR convection ov ens are as follows Peak temperature 245 C Average ramp up rate to Peak 183 C to Peak 3 C second max Preheat temperature 125 25 C 120 seconds max Temperature maintained above 183 C 60 150 seconds Time within 5 C of actual peak temperature 10 20 seconds Ramp Down rate 6 C second max Time 25 C to peak temperature Table 8 Reflow soldering profile A1037 A As results of soldering may vary among different soldering systems and types of solder and depend on additional factors like density and types of components on board the values above should be considered as a starting point for further optimi zation Page 18 of 29 User s Manual V2 0 03 07 GPS Receiver rf l A1037 A Tyco Electronics 8 Use of Antenna 8 1 Connection of RF Signal The ANT pin is used to connect the receiver with the GPS antenna The design of the antenna connection has to be done strictly according to RF design rules A 50Q PCB strip line is required The following drawings shall explain the guidelines A major rule is to keep the strip line as short as possible Additionally antenna ground GNDANT should be routed to the groun
18. ossible Maximum allowed antenna current is 50mA Consider a current limiter A battery back up circuit for the RTC Real Time Clock should be consid ered see 10 6 Battery Back up NOTE Please make sure that the A1037 A is either within an enclosure or addi tionally shielded to reduce the influence of temperature fluctuations often generated by airflow V2 0 03 07 User s Manual Page 11 of 29 GPS Receiver A1037 A E Tyco Electronics 3 2 Antenna It is recommended to use an active GPS antenna with supply voltage of 3 to 5VDC and a current draw of 50mA maximum The quality of the GPS antenna chosen is of paramount importance for the overall sensitivity of the GPS system An active an tenna should have a gain 2 20dB and a noise figure lt 1 5dB which applies to more than 95 of the active antennas available in the market 3 3 Serial Port Settings Using Pin P0 13 two different set of GPS NMEA out messages with two different baud rates can be selected CONF P0 13 NMEA Messages Set Default Leave unconnected NMEA GGA VTG GSA GSV External pull up Baud rate 4800 X Transmit mode on UTC second External pull down NMEA GGA GSA GSV RMC TG TS PA Baud rate 57600 Transmit mode on UTC second Table 4 NMEA configuration This pin will be read by the software during the GPS software start up only Any changes in the setting afterwards will not affect the configuration The default configuration
19. pin to the Vbak pin Care needs to be taken that the there is no voltage outage during the switch over phase V2 0 03 07 User s Manual Page 25 of 29 GPS Receiver A1037 A E Tyco Electronics 11 Demonstration Kits 11 1 Evaluation Kit A1037 A For demonstration and easy evaluation of GPS performance Tyco Electronics offers a Demonstration Kit including one GPS A1037 A module It contains a USB inter face with according drivers to connect easily to a PC The USB interface is an ex tension of the serial port 0 therefore sending NMEA sentences and accepting commands At the same time it provides power to the module Accompanied by an antenna it offers a ready to go set For the development of new software and applications the Evaluation Kit also pro vides NMEA messages on C MOS level via a terminal plug For further information please contact Tyco Electronics Page 26 of 29 User s Manual V2 0 03 07 GPS Receiver T A1037 A Tyco Electronics 12 Related Information 12 1 Contact This manual was created with due diligence We hope that it will be helpful to the user to get the most out of the GPS module Anyway inputs about errors or mistakable verbalizations and comments or propos als to TYCO Electronics Power Systems in Munich Germany for further improve ments are highly appreciated Tyco Electronics Power Systems Tyco Electronics Corporation Power Systems Finsinger Feld 1 85521 Ottobrunn Germany Tel
20. utline solder side A1037 A Page 14 of 29 User s Manual V2 0 03 07 GPS Receiver f l A1037 A Tyco Electronics 5 Pin out Information 5 1 Layout A1037 A GND Vcc Vbak 1PPS RX1 TX1 TXO VANT GNDANT ANT GNDANT nRST CONF Res Figure 7 Pin out information A1037 A 5 2 Description A1037 A Signals Pin Symbo JDescipion gt Z 1 6 TX1 PO 11 Serialoutput 1 reserved for debug leave open 8 JRXO P 8 JSeraliputo NMEAin 0 0 9 nRST jResetinput Reset input d Ve CONF P0 13 NMEA configuration see chapter 3 3 Serial Port Settings Res P0 14 Reserved leaveopen antenna shield see below antenna shield see below Power supply antenna provide according voltage Table 5 Pin description A1037 A V2 0 03 07 User s Manual Page 15 of 29 GPS Receiver Tyco Electronics 211574 5 3 General Comments The following comments should be considered for a design with and use of the module e Standard configuration of serial port standard GPS software Serial 0 NMEA 4800 baud 8 data bits no parity 1 stop bit no flow control e Antenna Antenna connected to Antenna Pin Use ground pins pin 12 pin 14 close to the antenna input for RF ground Page 16 of 29 User s Manual V2 0 03 07 GPS Receiver T A1037 A Tyco Electronics 6 Electrical Characteristics 6 1 Operating Conditions
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