Ublox TIM-5H Quick setup guide

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your position is our focus
Abstract
Thisdocumentdescribesthehardwarefeaturesandspecificationsofthe
u-blox5basedTIM-5Hcosteffective,high-performanceGPS/GALILEOmodule.
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FeaturesincludeAssistNowOnlineandAssistNowOfflineA-GPSservices,
KickStartacceleratedacquisition,SuperSense®IndoorGPSprovidingbest-in-class
acquisitionandtrackingsensitivity,precisiontimingandaninnovativejamming-
resistantRFarchitecture.The25.4x25.4mmformfactorofthesuccessful
TIM-4seriesismaintained,enablingeasymigration.TheTIM-5Hsupports
passiveandactiveantennas.
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u-blox AG
Zürcherstrasse68
8800Thalwil
Switzerland
www.u-blox.com
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Phone+41447227444
Fax+41447227447
[email protected]
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TIM-5H
u-blox 5 GPS and GALILEO Module
Hardware Integration Manual
Manual

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TIM-5H-HardwareIntegrationManual 
GPS.G5-MS5-07015-A-1u-bloxproprietaryPage 2
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your position is our focus
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Title TIM-5H
Subtitle HardwareIntegrationManual 
Doc Type Manual
Doc Id GPS.G5-MS5-07015-A-1
Revision
Index Date Name Status / Comments
InitialVersion18/01/2008TC
InitialRelease16/04/2008TGAdditionofHardwareDescription,ProductHandling,ProducgtTesting,Appendix
116/04/2008TGPasteMask
Thisdocumentandtheuseofanyinformationcontainedtherein,issubjecttotheacceptanceoftheu-blox
termsandconditions.Theycanbedownloadedfromwww.u-blox.com.u-bloxmakesnowarrantiesbasedon
theaccuracyorcompletenessofthecontentsofthisdocumentandreservestherighttomakechangesto
specificationsandproductdescriptionsatanytimewithoutnotice.
u-bloxreservesallrightstothisdocumentandtheinformationcontainedherein.Reproduction,useor
disclosuretothirdpartieswithoutexpresspermissionisstrictlyprohibited.Copyright©2008,u-bloxAG.
Formostrecentdocuments,pleasevisitwww.u-blox.com
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Productsmarkedwiththislead-freesymbolontheproductlabelcomplywiththe
"Directive2002/95/ECoftheEuropeanParliamentandtheCouncilontheRestrictionof
UseofcertainHazardousSubstancesinElectricalandElectronicEquipment"(RoHS).
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ThisisanElectrostaticSensitiveDevice(ESD).
Observeprecautionsforhandling.


TIM-5H-HardwareIntegrationManual  Preface
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GPS.G5-MS5-07015-A-1u-bloxproprietaryPage 3
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your position is our focus
Preface
u-blox Technical Documentation
Aspartofourcommitmenttocustomersupport,u-bloxmaintainsanextensivevolumeoftechnical
documentationforourproducts.Inadditiontoourproduct-specifictechnicaldatasheets,thefollowingmanuals
areavailabletoassistu-bloxcustomersinproductdesignanddevelopment.
• GPS Compendium:Thisdocument,alsoknownastheGPSbook,providesawealthofinformation
regardinggenericGPSquestionsaboutsystemfunctionsandtechnology.
• Protocol Specification: Messages,configurationandfunctionalitiesoftheu-blox5softwarereleasesare
explainedinthisdocument.
• Hardware Integration Manual:ThisManualprovideshardwaredesigninstructionsandinformationon
howtosetupproductionandfinalproducttests.
How to use this Manual
TheTIM-5HHardwareIntegrationManualprovidesthenecessaryinformationtosuccessfullydesigninand
configuretheseu-blox5-basedGPS/GALILEOreceivermodules.Fornavigatingthisdocumentpleasenotethe
following:
Thismanualhasamodularstructure.Itisnotnecessarytoreaditfromthebeginningtotheend.Tohelpin
findingneededinformation,abriefsectionoverviewisprovidedbelow:
1.Hardware Basics:ThischapterintroducesthebasicsoffunctionandarchitectureoftheTIM5modules.
2.Design-In:ThischapterprovidestheDesign-Ininformationnecessaryforasuccessfuldesign.
3.Product Handling
Thischapterdefinespackaging,handling,shipment,storageandsoldering.
4.Product Testing
ThischapterprovidesinformationabouttestingofOEMreceiversinproduction.
5.Appendix
TheAppendixincludesguidelinesonhowtosuccessfullymigratetou-blox5designs,andusefulinformation
aboutthedifferentantennatypesavailableonthemarketandhowtoreduceinterferenceinyourGPS
design.
Thefollowingsymbolsareusedtohighlightimportantinformationwithinthemanual:
Anindexfingerpointsoutkeyinformationpertainingtomoduleintegrationandperformance.
A warning symbol indicates actions that could negatively impact or damage the module.
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
TIM-5H-HardwareIntegrationManual  Preface

GPS.G5-MS5-07015-A-1u-bloxproprietaryPage 4
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your position is our focus
Questions
Ifyouhaveanyquestionsaboutu-blox5HardwareIntegration,please:
• Readthismanualcarefully.
• Contactourinformationserviceonthehomepagehttp://www.u-blox.com
• ReadthequestionsandanswersonourFAQdatabaseonthehomepage4http://www.u-blox.com
Technical Support
Worldwide Web
Ourwebsite(6www.u-blox.com)isarichpoolofinformation.Productinformation,technicaldocumentsand
helpfulFAQcanbeaccessed24haday.
By E-mail
Ifyouhavetechnicalproblemsorcannotfindtherequiredinformationintheprovideddocuments,contactthe
nearestoftheTechnicalSupportofficesbyemail.Useourservicepoolemailaddressesratherthananypersonal
emailaddressofourstaff.Thismakessurethatyourrequestisprocessedassoonaspossible.Youwillfindthe
contactdetailsattheendofthedocument.
By Phone
Ifanemailcontactisnottherightchoicetosolveyourproblemordoesnotclearlyansweryourquestions,call
thenearestTechnicalSupportofficeforassistance.Youwillfindthecontactdetailsattheendofthedocument.
Helpful Information when Contacting Technical Support
WhencontactingTechnicalSupportpleasehavethefollowinginformationready:
• Receivertype(e.g.TIM-5H)andfirmwareversion(e.g.V4.00)
• Receiverconfiguration
• Cleardescriptionofyourquestionortheproblemtogetherwithau-centerlogfile
• Ashortdescriptionoftheapplication
• Yourcompletecontactdetails


TIM-5H-HardwareIntegrationManual  Contents
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GPS.G5-MS5-07015-A-1u-bloxproprietaryPage 5
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your position is our focus
Contents
Preface ................................................................................................................................3
Contents..............................................................................................................................5
1Hardware Description ..................................................................................................8
1.1 FunctionalOverview ............................................................................................................................. 8
1.2 ModuleFeatures................................................................................................................................... 8
1.3 Architecture.......................................................................................................................................... 9
2Design-In.....................................................................................................................10
2.1 PowerManagement ........................................................................................................................... 10
2.1.1 ConnectingPower....................................................................................................................... 10
2.1.2 PowerModes .............................................................................................................................. 11
2.1.3 V_ANT......................................................................................................................................... 11
2.2 SystemFunctions................................................................................................................................ 12
2.2.1 EXTINT-ExternalInterruptPin..................................................................................................... 12
2.2.2 SystemMonitoring ......................................................................................................................12
2.3 Interfaces............................................................................................................................................ 12
2.3.1 Serial ........................................................................................................................................... 12
2.4 I/OPins ............................................................................................................................................... 13
2.4.1 RESET_N...................................................................................................................................... 13
2.4.2 EXTINT0 ...................................................................................................................................... 13
2.4.3 AADET_N .................................................................................................................................... 13
2.5 Design-In ............................................................................................................................................ 14
2.5.1 SchematicDesign-InChecklistforu-blox5 .................................................................................. 14
2.6 TIM-5HDesign.................................................................................................................................... 14
2.6.1 TIM-5HDesign ............................................................................................................................ 15
2.7 LayoutDesign-InChecklist.................................................................................................................. 17
2.8 Layout ................................................................................................................................................ 17
2.8.1 Footprint ..................................................................................................................................... 17
2.8.2 PasteMask.................................................................................................................................. 18
2.8.3 Placement ................................................................................................................................... 19
2.8.4 AntennaConnectionandGroundingPlaneDesign...................................................................... 20
2.8.5 AntennaMicroStrip .................................................................................................................... 21
2.9 AntennaandAntennaSupervisor ....................................................................................................... 22
2.9.1 PassiveAntenna .......................................................................................................................... 23

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TIM-5H-HardwareIntegrationManual  Contents
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GPS.G5-MS5-07015-A-1u-bloxproprietaryPage 6
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2.9.2 ActiveAntenna ........................................................................................................................... 23
2.9.3 ActiveAntennaBiasPower.......................................................................................................... 24
2.9.4 ActiveAntennaSupervisor........................................................................................................... 24
3Product Handling........................................................................................................28
3.1 Packaging........................................................................................................................................... 28
3.1.1 Reels ........................................................................................................................................... 28
3.1.2 Tapes .......................................................................................................................................... 29
3.2 Shipment,StorageandHandling ........................................................................................................ 29
3.2.1 Handling ..................................................................................................................................... 29
3.2.2 Shipment..................................................................................................................................... 29
3.2.3 Storage ....................................................................................................................................... 30
3.2.4 Handling ..................................................................................................................................... 30
3.2.5 FloorLife ..................................................................................................................................... 31
3.3 Processing .......................................................................................................................................... 32
3.3.1 MoisturePreconditioning ............................................................................................................ 32
3.3.2 SolderingPaste............................................................................................................................ 32
3.3.3 ReflowSoldering ......................................................................................................................... 33
3.3.4 OpticalInspection........................................................................................................................ 34
3.3.5 Cleaning...................................................................................................................................... 35
3.3.6 RepeatedReflowSoldering.......................................................................................................... 35
3.3.7 WaveSoldering ........................................................................................................................... 35
3.3.8 HandSoldering ........................................................................................................................... 35
3.3.9 Rework........................................................................................................................................ 35
3.3.10 ConformalCoating ..................................................................................................................... 36
3.3.11 Casting........................................................................................................................................ 36
3.3.12 GroundingMetalCovers ............................................................................................................. 36
3.3.13 UseofUltrasonicProcesses.......................................................................................................... 36
4Product Testing...........................................................................................................37
4.1 u-bloxIn-SeriesProductionTest.......................................................................................................... 37
4.2 TestParametersforOEMManufacturer.............................................................................................. 37
4.3 SystemSensitivityTest ........................................................................................................................ 38
4.3.1 GuidelinesforSensitivityTests..................................................................................................... 38
4.3.2 ‘Go/Nogo’testsforintegrateddevices........................................................................................ 38
Appendix..........................................................................................................................39
AMigration to u-blox 5 receivers.................................................................................39

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TIM-5H-HardwareIntegrationManual  Contents
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GPS.G5-MS5-07015-A-1u-bloxproprietaryPage 7
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A.1 MigrationfromTIM-4H/TIM-4PtoTIM-5H........................................................................................ 40
A.2 TypicalPinAssignmentTIMmodules .................................................................................................. 41
BAntennas.....................................................................................................................42
B.1 SelectingtherightAntenna ................................................................................................................ 42
B.2 ActiveandPassiveAntennas............................................................................................................... 43
B.3 PatchAntennas .................................................................................................................................. 43
B.4 HelixAntennas ................................................................................................................................... 45
B.5 HelixorPatch,whichselectionisbest? ............................................................................................... 45
B.6 AntennaMatching ............................................................................................................................. 46
B.7 AntennaPlacement ............................................................................................................................ 47
CInterference Issues .....................................................................................................48
C.1 SourcesofNoise................................................................................................................................. 48
C.2 EliminatingDigitalNoiseSources ........................................................................................................ 49
C.2.1 PowerandGroundPlanes ........................................................................................................... 49
C.2.2 HighSpeedSignalLines............................................................................................................... 50
C.2.3 DecouplingCapacitors ................................................................................................................ 50
C.3 Shielding ............................................................................................................................................ 52
C.3.1 FeedthroughCapacitors ............................................................................................................. 52
C.3.2 ShieldingSetsofSub-SystemAssembly ....................................................................................... 54
DLists .............................................................................................................................55
D.1 ListofFigures ..................................................................................................................................... 55
D.2 ListofTables....................................................................................................................................... 56
EGlossary ......................................................................................................................250H57
98HRelated Documents ..........................................................................................................251H57
99HContact..............................................................................................................................252H58

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TIM-5H-HardwareIntegrationManual  HardwareDescription
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GPS.G5-MS5-07015-A-1u-bloxproprietaryPage 8
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1 Hardware Description
1.1 Functional Overview
TheTIM-5Hmoduleisaself-containedGPSandGALILEOreceiverfeaturingthehighperformance50-channel
u-blox5positioningengine.TIM-5HprovidesexceptionalGPSperformanceinacompactformfactorandatan
economicalprice.u-blox5setsanewstandardinGPSreceivertechnology.A32-channelacquisitionenginewith
over1millioneffectivecorrelatorsiscapableofmassiveparallelsearchesacrossthetime/frequencyspace.This
enablesaTimeToFirstFix(TTFF)oflessthan1second,whilelongcorrelation/dwelltimesmakepossiblethe
best-in-classacquisitionandtrackingsensitivity.Onceacquired,satellitesarepassedontoadedicatedtracking
engine.ThisarrangementallowstheGPSenginetosimultaneouslytrackupto16satelliteswhilesearchingfor
newones.u-blox5’sadvancedjammingsuppressionmechanismandinnovativeRFarchitectureprovideahigh
levelofimmunitytojamming,ensuringmaximumGPSperformance.u-blox5hasbeendesignedtobeableto
supporttheGALILEOsystemcurrentlybeingdevelopedbyEuropeanauthorities.Thecapabilityofreceiving
GALILEOL1signalswillprovideincreasedcoverageandevenbetterpositioningaccuracywhenthissystem
comesintooperation.
WiththeTIM-5Hthecompletesignalprocessingchainfromantennainputtoserialoutputiscontainedwithina
singlecomponent.TIM-5Hmaintainsthecompact25.4x25.4mmformfactorofthehighlysuccessfulTIM-4
series,andhasbeendesignedwithbackwardscompatibilityinmind,enablingeaseofupgradeandreducing
engineeringanddesigncosts.
Thisfull-featureandhighlyflexibleGPSandGALILEOreceiverisidealforupgradingexistingdesignsbasedon
theindustrystandardTIMformfactor.ThepackagingmakesexpensiveRFcablingobsolete,withtheRFinput
beingavailabledirectlyonapin.TheTIM-5HisSMTsolderableandcanbehandledbystandardpickandplace
equipment.
TheTIM-5Hcomesequippedwith2serialports,whichcanhandleNMEAandUBXproprietarydataformats.The
FLASHEPROMprovidesthecapacitytostoreuser-specificconfigurationsettingsaswellasfuturesoftware
updates.
TheTIM-5HmoduleisRoHScompliant(lead-free).
TheTIM-5HGPS/GALILEOreceivermoduleisnotdesignedforlifesavingorsupportingdevicesorforaviation
andshouldnotbeusedinproductsthatcouldinanywaynegativelyimpactthesecurityorhealthoftheuseror
thirdpartiesorthatcouldcausedamagetogoods.
1.2 Module Features
Voltage Range (V)
Thickness (mm)
50-channel
engine
KickStart
SuperSense
FW Update
/ FLASH
Low Power
Modes
UART
USB
SPI
DDC
AssistNow
Online
AssistNow
Offline
Dead Reckoning
Raw Data
Precision Timing
1PPS
CFG Pin
Reset Input
Antenna
Supply
Antenna
Supervisor
TIM-5H 2.7-3.6 3.0     P 2      
P=PlannedavailabilityQ1/09
Table 1: Features of the TIM-5H

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1.3 Architecture
TIM-5Hmodulesaredividedintotwodistinct,separatelyshieldedsections.ThesmallersectionistheRF-Section,
thelargersectioncontainstheBaseband.SeeFigure1forablockdiagramoftheTIM-5Hmodule.
TheRFFront-EndcontainstheintegratedLowNoiseAmplifier(LNA),theSAWbandpassfilter,theu-blox5RF-IC
andtheTCXOorXTOcrystal.
TheBasebandsectioncontainsthedigitalcircuitrycomprisedoftheu-blox5Basebandprocessor,theRTCcrystal
andadditionalelementssuchastheoptionalFLASHEPROMforenhancedprogrammabilityandflexibility.
RF Front-End
with
Integrated LNA
Baseband Processor (UBX-G5000)
Power
Management
TCXOorXTAL
RTC
FLASH EPROM
Antenna
Supervision
PowerControl
RF_IN
V_ANT
AADET_N
VCC_RF
VCC
V_BACKUP
GND
VCC _OUT
UART
EXTINT
RESET_N
SAFEBOOT
TIMEPULSE
Digital
IFFilter
Backup
RAM
ROMCode
GPS/GALILEO
Engine
ARM7CPU
SRAM
SAW
Filter
RTC
LDO
RESET_N
VDD

Figure 1: TIM-5H Block Diagram
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2 Design-In
FormigratingexistingANTARIS®4productdesignstou-blox5pleaserefertoAppendix A.
InordertoobtaingoodperformancewithaGPSreceivermodule,thereareanumberofpointsthatrequire
carefulattentionduringthedesign-in.Theseinclude:
• PowerSupply
Goodperformancerequiresacleanandstablepowersupply.
• Interfaces
Ensurecorrectwiring,rateandmessagesetuponthemoduleandyourhostsystem.
• Antennainterface
Foroptimalperformanceseekshortrouting,matchedimpedanceandnostubs.
2.1 Power Management
2.1.1 Connecting Power
u-blox5receivershavethreepowersupplypins:VCC,V_BCKP and VDDUSB.
2.1.1.1 VCC - Main Power
ThemainpowersupplyisfedthroughtheVCCpin.Duringoperation,thecurrentdrawnbytheu-blox5GPS
modulecanvarybysomeordersofmagnitude,especially,iflow-poweroperationmodesareenabled.Itis
importantthatthesystempowersupplycircuitryisabletosupportthepeakpower(seedatasheetfor
specification)forashorttime.Inordertodefineabatterycapacityforspecificapplicationsthesustainedpower
figureshallbeused.
2.1.1.2 V_BCKP - Backup Battery
IncaseofapowerfailureonpinVCC,thereal-timeclockandbackupRAMaresuppliedthroughpinV_BCKP.
Thisenablestheu-blox5receivertorecoverfromapowerfailurewitheitheraHotstartoraWarmstart
(dependingonthedurationofVCCoutage)andtomaintaintheconfigurationsettings.Ifnobackupbatteryis
connected,thereceiverperformsaColdstartatpowerup.
IfnobackupbatteryavailableconnecttheV_BCKPpintoGND (or VCC).
AslongasVCCissuppliedtotheu-blox5receiver,thebackupbatteryisdisconnectedfromtheRTCandthe
backupRAMinordertoavoidunnecessarybatterydrain(seeFigure2).PowertoRTCandBBRissuppliedfrom
VCCinthiscase.
VCC
V_BCKP
Voltage
Supervisor
Module Voltage Supply
RTC and Battery Backup RAM (BBR)
J1

Figure 2: Backup Battery and Voltage

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2.1.2 Power Modes
u-blox5technologyofferspoweroptimizedarchitecturewithbuilt-inautonomouspowersavingfunctions.The
receiverusesAutonomousPowerManagementtominimizethepowerconsumptionatanygiventime.
Furthermore,thesoftwareshutsdowntheclocksupplytounusedperipheralon-chipblocks.
2.1.3 V_ANT
TheTIM-5HmoduleusesthepinV_ANTtosupplytheactiveantenna.Usea10RresistorinfrontofV_ANT.See
chapter2.9.

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2.2 System Functions
2.2.1 EXTINT - External Interrupt Pin
EXTINT0 isanexternalinterruptpin.ItwillbeusedinfutureTIM-5Hreleasesforwake-upfunctionsinlow-
powermodes.
2.2.2 System Monitoring
Theu-blox-5GPSandGALILEOReceiverprovidesSystemMonitoringfunctionsthatallowtheoperationofthe
embeddedprocessorandassociatedperipheralstobesupervised.TheseSystemMonitoringfunctionsarebeing
outputaspartoftheUBXprotocol,class‘MON’.
Pleaserefertotheu-blox 5Protocol Specification [1].FormoreinformationonUBXmessages,serialinterfaces
fordesignanalysisandindividualsystemmonitoringfunctions.
2.3 19BInterfaces
2.3.1 51BSerial
UART1(RxD1/TxD1)isthedefaultserialinterface.Itsupportsdataratesfrom4.8to230.4kBit/s.Thesignal
outputlevelsare0VtoVCC.AninterfacebasedonRS232standardlevels(+/-12V)canberealizedusinglevel
shifterssuchasMaximMAX3232.
TheRxD1hasfixedinputvoltagethresholds,whichdonotdependonVCC(seeTIM-5H Data Sheet258H[3]).
Leaveopenifunused.
Hardwarehandshakesignalsandsynchronousoperationarenotsupported.
ForthedefaultsettingsseetheTIM-5H Data Sheet259H[3].

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2.4 I/O Pins
2.4.1 RESET_N
AswithANTARIS4versions,TIM-5HcomesequippedwithaRESET_Npin.DrivingthesignallowatRESET_N
activatesahardwareresetofthesystem.UnlikeLEA-4xmodules,RESET_NisnotanI/OwithTIM-5H.Itisonly
aninputandwillnotresetexternalcircuitry.
Usecomponentswithopendrainoutput(i.e.withbufferorvoltagesupervisor).
Thereisaninternalpullupresistorof3k3toVCCinsidethemodulethatrequiresthattheresetcircuitrycan
deliverenoughcurrent(e.g.1mA).
RESET_N isprovidedwithTIM-5HtoprovideResetcompatibilitywithANTARIS4versions.FutureTIMmodels
maynotincludethispinanditisthereforenotrecommendedtouseit.Thepreferredoptionforexecutinga
hardwareresetistosendsoftwarecommands(CFG-RST).
DonotdriveRESET_N high.
2.4.2 EXTINT0
EXTINT0 isanexternalinterruptpinwithfixedinputvoltagethresholdsindependentofVCC(seetheTIM-5H
Data Sheet[3]).Leaveopenifunused.
2.4.3 AADET_N
AADET_Nisaninputpinandisusedtoreportwhetheranexternalcircuithasdetectedaexternalantennaor
not.Lowmeansantennahasbeendetected.Highmeansnoexternalantennahasbeendetected.
Seechapter2.9.4foranimplementationexample.

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2.5 Design-In
ThissectionprovidesaDesign-InChecklistaswellasReferenceSchematicsfornewdesignswithu-blox5.For
migrationofexistingANTARIS®4productdesignstou-blox5pleaserefertoAppendix A.
2.5.1 Schematic Design-In Checklist for u-blox 5
Designing-inaTIM-5HGNSSreceiveriseasyespeciallywhenadesignisbasedonthereferencedesigninthe
HardwareIntegrationManual.Nonetheless,itpaystodoaquicksanitycheckofthedesign.Thissectionliststhe
mostimportantitemsforasimpledesigncheck.TheLayoutDesign-InChecklistalsohelpstoavoidan
unnecessaryrespinofthePCBandhelpstoachievethebestpossibleperformance.
ItishighlyrecommendedtofollowtheDesign-InChecklistwhendevelopinganyu-blox5GNSS
applications.Thiscansignificantlyreducedevelopmenttimeandcosts.
Have you chosen the optimal module?
TheTIM-5HhasbeenintentionallydesignedtofitintoexistingTIMdesigns.ThenewTIM-5Hisasfaraspossible
compatibletothepreviousgenerationsmainlyANTARIS4.Fordetailstobeconsideredinthemigrationprocess,
pleaserefertoAppendix A.
Check Power Supply Requirements and Schematic:
 Isthepowersupplywithinthespecifiedrange?
 ComparethepeakcurrentconsumptionofTIM-5Hwiththespecificationofyourpowersupply.
 GPSreceiversrequireastablepowersupply,avoidrippleonVCC (<50mVpp)
Backup Battery
 ForachievingaminimalTimeToFirstFix(TTFF)afterapowerdown,makesuretoconnectabackupbattery
toV_BCKP. 
Antenna
 Thetotalnoisefigureshouldbewellbelow3dB.
 Ifapatchantennaisthepreferredantenna,chooseapatchofatleast15x15mm.Designsusingsmaller
antennasrequireAiding
 Makesuretheantennaisnotplacedclosetonoisypartsofthecircuitry.(e.g.micro-controller,display,etc.)
 Foractiveantennasadda10RresistorinfrontofV_ANTinputforshortcircuitprotectionorusethe
antennasupervisorcircuitry.
Schematic
 Don’tdriveRESET_Nhigh!
 Planuseof2ndinterface(Testpointsonserialport,DDC,SPI)forfirmwareupdatesorasaserviceconnector.
2.6 TIM-5H Design
ForaminimalDesignwithTIM-5Hthefollowingfunctionsandpinsneedtobeconsidered:
• ConnectthePowersupplytoVCC.
• AssureanoptimalgroundconnectiontoallgroundpinsoftheTIMmoduleespeciallyclosetoRF_IN.
• ConnecttheantennatoRF_INoveramatching50Ohmmicrostripanddefinetheantennasupply(V_ANT)
foractiveantennas(internalorexternalpowersupply)
• Choosetherequiredserialcommunicationinterface(USART)andconnecttheappropriatepinstoyour
application
• IfyouneedHot-orWarmstartinyourapplication,connectaBackupBatterytoV_BCKP

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• DecidewhetherTIMEPULSEorRESET_Noptionsarerequiredinyourapplicationandconnectthe
appropriatepinsonyourmodule
2.6.1 TIM-5H Design
ThisisaminimalsetupforaPVTGNSSreceiverwithaTIM-5Hmodule.
TIM-5H
Top View
GND
RF_IN
GND
V_BCKP
16
17
18
19
20
30
29
28
27
26
25
24
23
22
21
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
RxD2
TxD1
RxD1
Reserved
GND
VCC
GND
GND
GND
GND
GND
Vcc
Micro
Processor
(serial)
Passive Antenna
Reserved
TxD2
Reserved
VCC_OUT
RESET_N
AADET_N
Reserved
Reserved
TIMEPULSE
Reserved
EXTINT0
Reserved
Reserved
V_ANT
VCC_RF
Backup
Battery
+

Figure 3: Passive Antenna Design for TIM-5H Receivers

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
Function PIN I/O Description Remarks
Power    
VCC 1ISupplyVoltageProvidecleanandstablesupply.MaximumallowedRippleVcc=50mV.
GND 2,11-
16,18IGroundAssureagoodGNDconnectiontoallGNDpinsofthemodule,preferablywith
alargegroundplane.
VCC_OUT 10O ConnectedtoVCC.Leaveopenifnotused.
V_BCKP 21IBackupvoltage
supply
It’srecommendedtoconnectabackupbatterytoV_BCKPinordertoenable
WarmandHotStartfeaturesonthereceivers.OtherwiseconnecttoGND (or
VCC).
Antenna    
RF_IN 17IGNSSsignalinput
fromantenna
Useacontrolledimpedancetransmissionlineof50OhmtoconnecttoRF_IN.
Don’tsupplyDCthroughthispin.UseV_ANTpintosupplypower.
VCC_RF 20OOutputVoltageRF
section
Canbeusedtopoweranexternalactiveantenna(VCC_RFconnectedto
V_ANT).ThemaxpowerconsumptionoftheAntennamustnotexceedthe
datasheetspecificationofthemodule.
Leaveopenifnotused.
V_ANT 19IAntennaBias
voltage
ConnecttoGND(orleaveopen)ifPassiveAntennaisused.
IfanactiveAntennaisused,adda10RresistorinfrontofV_ANTinputfor
shortcircuitprotectionorusetheantennasupervisorcircuitry.
AADET_N 27IActiveAntenna
Detect
Inputpinforoptionalantennasupervisorcircuitry.
Leaveopenifnotused.
Serial Port    
TxD1 5OSerialPort1
TxD2 6OSerialPort2
Serialportoutput.Leaveopenifnotused.
RxD1 4ISerialPort1
RxD2 7ISerialPort2
Serialportinputwithinternalpull-upresistortoVCC.Leaveopenifnotused.
Note Don’tuseanexternalpullupresistor.
System    
RESET_N 22IHardwareReset
(ActiveLow)
Leaveopenifnotused.Donotdrivehigh.
TIMEPULSE 29OTimepulseSignalConfigurableTimepulsesignal(onepulsepersecondbydefault).Leaveopenif
notused.
EXTINT0 23IExternalInterruptExternalInterruptPin.
Internalpull-upresistorto VCC.Leaveopenifnotused.
Reserved 3ILeaveopen,donotdrivelow.
Reserved 8I/0Leaveopen
Reserved 9I/0Leaveopen
Reserved 24I/0Leaveopen
Reserved 25I/0Leaveopen
Reserved 26I/0Leaveopen
Reserved 28I/0Leaveopen
Reserved 30I/0

Leaveopen
Table 2: Pinout TIM-5H


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TIM-5H-HardwareIntegrationManual  Design-In
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2.7 Layout Design-In Checklist
FollowthischecklistfortheLayoutdesigntogetanoptimalGPSperformance.
Layout optimizations (Section 2.8)
 IstheGPSmoduleplacedaccordingtotherecommendationinSection 2.8.3?
 HastheGroundingconceptbeenfollowed(seeSection 2.8.4)?
 Hasthemicrostripbeenkeptasshortaspossible?
 AddagroundplaneunderneaththeGPSmoduletoreduceinterference.
 Forimprovedshielding,addasmanyviasaspossiblearoundthemicrostrip,aroundtheserial
communicationlines,underneaththeGPSmoduleetc.
Calculation of the micro strip (Section 2.8.5)
 Themicrostripmustbe50OhmsandberoutedinasectionofthePCBwhereminimalinterferencefrom
noisesourcescanbeexpected.
 Incaseofamulti-layerPCB,usethethicknessofthedielectricbetweenthesignalandthe1stGNDlayer
(typicallythe2ndlayer)forthemicrostripcalculation.
 IfthedistancebetweenthemicrostripandtheadjacentGNDarea(onthesamelayer)doesnotexceed5
timesthetrackwidthofthemicrostrip,usethe“CoplanarWaveguide”modelinAppCadtocalculatethe
microstripandnotthe“microstrip”model.
2.8 Layout
ThissectionprovidesimportantinformationfordesigningareliableandsensitiveGPS/GALILEOsystem.
GPSsignalsatthesurfaceoftheEarthareabout15dBbelowthethermalnoisefloor.Signallossattheantenna
andtheRFconnectionmustbeminimizedasmuchaspossible.WhendefiningaGPSreceiverlayout,the
placementoftheantennawithrespecttothereceiver,aswellasgrounding,shieldingandjammingfromother
digitaldevicesarecrucialissuesandneedtobeconsideredverycarefully.
2.8.1 Footprint
25.4±0.1mm[1000±4mil]
25.4±0.1mm[1000±4mil]
1.9mm
[75mil]
2.8mm
[110mil]
1.277mm
[50.27mil]
1.5mm
[59mil]
0.8mm
[32mil]
1.0mm[39mil]
0.8mm
[32mil]
1.0mm[39mil]
0.8mm
[32mil]

Figure 4: Recommended footprint

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2.8.2 Paste Mask
Figure5showstherecommendedpositioningofthePasteMask,theCopperandSoldermasks,aswellasthe
stepstencil.NotethattheCopperandSoldermaskshavethesamesizeandposition.
Toimprovethewettingofthehalfvias,reducetheamountofsolderpasteunderthemoduleandincreasethe
volumeoutsideofthemodulebydefiningthedimensionsofthepastemasktoformaT-shape(orequivalent)
extendingbeyondtheCoppermaskasshowninFigure5.Inaddition,useastepstencilcoveringtheentirearea
ofthemoduleandbeyondthepastemasktoincreasethevolumeofsolderpastehere.Thesolderpasteatthe
stepstencilshouldhaveatotalthicknessof175to200μm.
Ifastepstencilisnotuseditisstilladvisabletoincreasethevolumeofsolderpasteoutsidethemoduletoattain
thedesiredlevelofwetting.Thismustbedonebymodifyingthegeometryofthepastemaskoutsidethe
module,toallowfortheincreasedvolumeofsolderpaste.
SolderMask
CopperMask
PasteMask
1.0mm
[39mil]
0.9mm
[35mil]
0.8mm
[32mil]
minimal
distance
Module
StepStencil
Next
Component

Figure 5: Recommendations for copper, solder and paste masks with enlargement
Thepastemaskoutlineneedstobeconsideredwhendefiningtheminimaldistancetothenext
component.
Theexactgeometry,distances,stencilthicknesses,stepheightsandsolderpastevolumesmustbe
adaptedtothespecificproductionprocesses(e.g.solderingetc.)ofthecustomer.
1.0mm [39mil]
0.9mm[35mil]
1.3mm [ 51mil ]
0.8mm
[32mil]
0.1mm
[4mil]
0.65mm
[26mil]
1.8mm[71mil]
0.65mm
[26mil]

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2.8.3 Placement
AveryimportantfactorinachievingmaximumGPSandGALILEOperformanceistheplacementofthereceiver
onthePCB.Theconnectiontotheantennamustbeasshortaspossibletoavoidjammingintotheverysensitive
RFsection.
MakesurethatRFcriticalcircuitsareclearlyseparatedfromanyotherdigitalcircuitsonthesystemboard.To
achievethis,positionthereceiverdigitalparttowardsyourdigitalsectionofthesystemPCB.Caremustalsobe
exercisedwithplacingthereceiverinproximitytocircuitrythatcanemitheat.TheRFpartofthereceiverisvery
sensitivetotemperatureandsuddenchangescanhaveanadverseimpactonperformance.
The RF part of the receiver is a temperature sensitive component. Avoid high temperature
drift and air vents near the receiver.

16
17
18
19
20
21
22
23
24
25
26
27
28
29
15
14
12
11
10
9
8
7
6
5
4
3
2
1
13
30
Non 'emitting'
circuits
PCB
Digital & Analog circuits
Non
'emitting'
circuits
Antenna
Digital Part
RF Part

RF & heat
'emitting'
circuits
PCB
Digital & Analog circuits
RF& heat
'emitting'
circuits
Antenna
16
17
18
19
20
21
22
23
24
25
26
27
28
29
15
14
12
11
10
9
8
7
6
5
4
3
2
1
13
30
Digital Part
RF Part

Figure 7: Placement

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2.8.4 Antenna Connection and Grounding Plane Design
u-blox5modulescanbeconnectedtopassivepatchoractiveantennas.TheRFconnectionisonthePCBand
connectstheRF_INpinwiththeantennafeedpointorthesignalpinoftheconnector,respectively.Figure 8
illustratesconnectiontoatypicalfive-pinRFconnector.Onecanseetheimprovedshieldingfordigitallinesas
discussedinAppendixC.3.Dependingontheactualsizeofthegroundarea,additionalviasshouldbeplacedin
theouterregion.Inparticular,theedgesofthegroundareashouldbeterminatedwithadenselineofvias.
micro strip line
Optional active antenna supply
GNSS module
no crossing signal lines or
signal trace vias in this area

Figure 8: Recommended layout
AsseeninFigure 8,anisolatedgroundareaiscreatedaroundandbelowtheRFconnection.Thispartofthe
circuitMUSTbekeptasfarfrompotentialnoisesourcesaspossible.Makecertainthatnosignallinescross,and
thatnosignaltraceviasappearatthePCBsurfacewithintheareaoftheredrectangle.Thegroundplaneshould
alsobefreeofdigitalsupplyreturncurrentsinthisarea.Onamultilayerboard,thewholelayerstackbelowthe
RFconnectionshouldbekeptfreeofdigitallines.Thisisbecauseevensolidgroundplanesprovideonlylimited
isolation.
Theimpedanceoftheantennaconnectionhastomatchthe50Ohmimpedanceofthereceiver.Toachievean
impedanceof50Ohms,thewidthWofthemicrostriphastobechosendependingonthedielectricthickness
H,thedielectricconstantεrofthedielectricmaterialofthePCBandonthebuild-upofthePCB(see
Section 2.8.5).Figure 9showstwodifferentbuilds:A2LayerPCBanda4LayerPCB.Thereferenceground
planeisinbothdesignsonlayer2(red).Thereforetheeffectivethicknessofthedielectricisdifferent.