GPS Synchronous Clock Generator - Connor WinfieldHoldover/Wander Generation Performance 4 Reference Option: TCXO OCXO T STA Temperature Stability ±0.5 ppm ±20 ppb 5 V STA Vcc Stability

Features•Phaselocked10.0MHzoutput

•AvailablewithotheroutputFrequencies(ie:16.384MHz)

•3selectablereferences:GPS,External10MHzorExternal1PPS

•Holdover

•Threealarmoutputs.(Loss-of-Lock,HoldoverandAntennaFault)

•Serialinputandoutputports(GPSreceiver)

•Masterreset

•+3.3Voltpowersupply

•CommercialTemp(0-70°C)

•MeetsITU-TG.811WanderGenerationMask

•MeetsETSI-PRCWanderGenerationMask(w/OCXOreference)

•MCXGPSAntennaConnection

•Availablein016.384MFrequencyOutput

•FixedPositionUnit

125 Series FR125GPS Synchronous Clock Generator

2111 Comprehensive Drive

Aurora, Illinois 60505

Phone: 630-851-4722

Fax: 630- 851- 5040

www.conwin.com

Bulletin SG157Revision 01Date 27 May 11Issued By ENG

General DescriptionThe FR125 Frequency module is a GPS driven, mixed-signal phase lock loop, generating up to 10.0MHz CMOS and a 10MHz SINE output from an intrinsically low jitter voltage controlled crystal oscillator. The FR125 can lock to a 10MHz reference derived from the on-board GPS receiver or an external 10MHz reference or to an external 1PPS reference. Alarms are provided to indicate Loss-of-Lock, Holdover, and Antenna Fault. The on-board GPS receiver requires an outdoor mounted GPS antenna for the best stability and consistent performance. The mode control inputs are used to manually switch between references and/or holdover. The user application should monitor the alarm outputs and manually switch modes as needed. Serial I/O lines provide access to the NMEA messages from the GPS receiver (referenced in the Connor-Winfield’s Wi125 User Manual. Contact Connor-Winfield Sales for a copy). The serial I/O lines can be used to access GPS timestamp information, or to verify that the receiver has recovered from an alarm condition. The reset is used to reset the GPS receiver (if needed).

DATA

SHEET

FR125 Data Sheet #: SG157 Page 2 Rev: 01 Date: 05/27/11

© Copyright 2011 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice

Functional Block DiagramFigure 1

CPLD

ANALOG

FILTER

1 / N

LOW JITTER

VCXO

or

OCVCXO

DRIVER

DRIVER

&

TRANSLATION

ANTENNNA FAULT STATUS

LOCK STATUS

HOLDOVER STATUS

SERIAL OUTPUT (A, B, C)

10 MHz CMOS

OUTPUT

10 MHz SINE

OUTPUT

DPFD

BOOT SEL

SERIAL IN

(A, B, C)

GPS REF

33Ω

MCX

Connector

FR125 Module

10 MHz REF

1 PPS REF

RESET

SYNC 1 CONTROL

SYNC 2 CONTROL

DISABLE

Wi125

(GPS Receiver)

OCXO

or

TCXO

REFERENCE

JTAG (Programming Only)



Typical ApplicationFigure 2

FR

125

Mod

ule

NU



Pin DescriptionTable 1

Pin # Pin Name Description 1 TXC RS-232communicationtransmitsignalforUART2(Optional) 2 TXB RS-232communicationtransmitsignalforUART1(Optional) 3 TXA RS-232communicationtransmitsignalforUART0(Optional) 4 GND 5 RXC RS-232communicationreceivesignalforUART2(Optional) 6 RXB RS-232communicationreceivesignalforUART1(Optional) 7 RXA RS-232communicationreceivesignalforUART0(Optional) 8 *Bootsel NormallyHIGH-OnlypulledlowforRS-232re-programmingofGPSsoftware. Defaultstateispulledhighinternally. 9 10MHzRefInput ExternalLVCMOS10.0MHzreference(Optional).Defaultstateispulledhighinternally. 10 *Reset HardwareResetfortheGPStimingcircuitry.Pulllowtoreset.Defaultstateispulled highinternally. 11 GND 12 1PPSRefInput ExternalLVCMOS1PPSreference(Optional).Defaultstateispulledhighinternally. 13 GND 14 AntennaSupplyVoltage AntennaSupplyVoltage.Limitcontinuouscurrentto45mAMax. 15 GND 16 VCC1 SupplyvoltageforGPStimingcircuitry. 17 VCC2 Supplyvoltagefornoiseclean-upandinterfacingcircuitry. 18 GND 19 SYNC1Control Lockmodecontrolsignal1.SeeTable4forfunctionaldescription. Defaultstateispulledhighinternally. 20 SYNC2Control Lockmodecontrolsignal2.SeeTable4forfunctionaldescription. Defaultstateispulledhighinternally. 21 *Disable Open/High=enabledoutputs.Pulllowtodisablethe10MHzCMOSandSINEoutputs. Defaultstateispulledhighinternally. 22 Unused 23 HoldoverStatus High=UnitisinHoldover 24 LockStatus High=Unitislockedtoselectedreference. 25 AntennaFaultStatus High=AfaulthasbeendetectedonPin14(AntennaSupplyVoltage) 26 Unused 27 GND 28 10MHzCMOSOutput* 10MHzlowjitterCMOSoutput 29 Unused 30 Unused 31 GND 32 10MHzSINEOutput* 10MHzACcoupledlowjitterSINEoutput

Note: Other frequencies (ie: 16.384 MHz) available upon request.



NOTES:

1. Stresses beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the module. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “Operating Specifications” is not implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability.

2. Requires external regulation and supply decoupling

3. Cold Power-up

4. Holdover will be re-calculated with each successful lock. Yearly aging represents 1 continous year in Holdover.

5. Relative to 25°C

Absolute Maximum RatingTable 2

Symbol Parameter Minimum Maximum Units N otesVCC PowerSupplyVoltage -0.3 3.7 Volts 1VIN InputVoltage -0.3 4.6 Volts 1VPREAMP AntennaSupplyVoltage 2.7 13.2 Volts 1TS StorageTemperature -30 80 °C 1

Operating SpecificationsTable 3

Symbol Parameter Minimum Nominal Maximum Units NotesVCC1 SupplyVoltage1 3.135 3.3 3.465 VICC1 SupplyCurrent1 withTCXO .200 .300 A withOCXO .480 1.2 AVCC2 SupplyVoltage2 3.135 3.3 3.465 V 2ICC2 SupplyCurrent2 withVCXO .040 .75 A withVCOCXO .380 1.0 ATO TemperatureRange 0 70 °CtJTOL InputJitterTolerance 30 nstAQ_GPS GPSInputAcquisitionTime TCXO 120 sec 3 OCXO 150 sec 3tAQ_EXT ExternalInputAcquisitionTime VCXO 90 sec 3 OCVCXO 120 sec 3 Oscillator Performance

PLL Option: VCXO OCVCXO

FCAP Capture/Pull-inRange ±50ppm ±45ppbFBW JitterFilterBandwidth 6HzTyp. 0.1HzTyp.DC DutyCycle 45/55% 45/55%RMS RMSPhaseNoise 10Hz-2MHz 20psTyp. 1psTyp. 12kHz-2MHz 0.5psTyp. 0.6psTyp. Holdover/Wander Generation Performance 4Reference Option: TCXO OCXO

TSTA TemperatureStability ±0.5ppm ±20ppb 5VSTA VccStability 0.1ppm ±5ppbADAILY DailyAging TBD 2ppbAYEARLY YearlyAging 2ppm 80ppb WanderGenerationSpecification ITU-TG.811 ETSI-PRC



Input And Output CharacteristicsTable 5

LVCMOS Inputs and Outputs

Symbol Parameter Minimum Maximum Units NotesVIH HighLevelInputVoltage 1.7 4.0 VVIL LowLevelInputVoltage -0.5 0.8 VVOH HighLevelOutputVoltage 2.4 VVOL LowLevelOutputVoltage 0.4 V

SineOutput(Pin32)Symbol Parameter Typical Units Notes Load 50 ohms Output Power 9 dBm Total Harmonic Distortion 2.2 %

GPS Receiver SpecificationsTable 6

Parameter Specifications NotesAcquisition/TrackingSensitivity -155dBm/-156dBmAcquisitionTime: HotStartw/NetworkAssist Outdoor:<2sec Indoor(-148dBm)<5sec StandAlone Cold<45sec Warm:<38sec Hot:<5sec Re-acquisition:<1sec(90%confidendce)SupportedProtocols NetworkAssist,NMEA0183

Reset Generation (I/O pin 10 - RESET)The power-on-reset for the FR125 is generated on-board. If it is desired to extend the power-on-reset signal or provide a manual reset of the GPS receiver, pull this signal low.

Mode Control TableTable 4

* Note: Holdover is not supported in this mode; loss of the 10MHz reference will rail the PLL output until the reference returns or another mode is selected.



Phase Noise:OffsetFrequency(Hz) COO(dBc/Hz) CTV(dBc/Hz) 10 -105 -70 100 -132 -105 1k -145 -135 10k -150 -145 100k -152 -152 1M -154 -158

Phase NoiseFigure 2

Antenna RequirementsTable 7

Parameter NotesTheFTS125antennaconnectorisanMCX(female)TheantennasupplyvoltageprovidedtoPin14mustbewithintherangeof2.7to13.2V(AMR);theantennamustbeabletooperateatthisvoltageTheantenna’scontinuouscurrentdrawmustbe<=45mATheantennamusthaveafullskyviewforoptimalreceiverperformanceAnactiveantennawithaminimum10dBgain(includingcableloss)shouldbeused

Standard 125 Series models are designed for fixed position operation only. Contact Connor-Winfield Sales for mobile application model offerings



Allan Variance – CTVFigure 3

Allan Variance – COOFigure 4



Wander Generation Plot – CTV versus G.811 Wander Generation MaskFigure 5

Wander Generation Plot – COO versus ETSI-PRC Wander Generation MaskFigure 6

1

10

100

1,000

10,000

100,000

0.01 0.10 1.00 10.00 100.00 1,000.00 10,000.00 100,000.00 1,000,000.00Observation Interval (sec)

MT

IE (

ns

)

1

10

100

1000

10000

0.1 1 10 100 1000 10000 100000Observation Interval (sec)

MT

IE (

ns

)



Package DimensionsFigure 7

Recommended Footprint DimensionsFigure 8

0.038"Hole

Thru Allx32

0.065"Padx32

FR125 Dimensions

andKeepout Area

Top View

Soldering and Cleaning RecommendationsHand solder, leaded wave solder, and lead-free wave solder processes are recommended for attaching the FR125 after reflow processes are complete. Since the FR125 does not have hermetic enclosure, hand cleaning the leads is recommended and the module should not be completely immersed.



Ordering Information

Ex: FR125-COO-010.0MHz

FR125 C O O 10.0M Temp Range Wi125 Reference PLL Oscillator Output Frequency** C=0-70degC O=OCXO O=OCVCXO* T=TCXO V=VCXO* CTO Option is not available** Other output frequencies (ie: 16.384MHz) available upon request.

2111 Comprehensive Drive

Aurora, Illinois 60505

Phone: 630-851-4722

Fax: 630- 851- 5040

www.conwin.com

Revision Date NoteA00 2/27/08 AdvanceInformationalReleaseA01 6/19/08 TemperatureRangeEditP00 8/19/08 EdittoPreliminaryfromAdvancedP01 8/26/08 EditstotemperatureP02 9/12/08 IndoorTempRevisionP03 11/13/08 UpdatedBlockDiagramP04 12/03/08 MCXInfoadded&BlockDiagramUpdateP05 11/05/09 NewFrequencyOutputP06 12/10/09 AntennaRequirements&TypicalAppDrawingP07 01/08/10 FixedUnitClarification&GPSReferenceInformation00 06/16/10 125SeriesUpdateandrevisedtorelease01 05/27/11 UpdatedBlockDiagramtoWi125Receiver&SolderingRecommendations

Documents

GPS Synchronous Clock Generator - Connor WinfieldHoldover/Wander Generation Performance 4 Reference Option: TCXO OCXO T STA Temperature Stability ±0.5 ppm ±20 ppb 5 V STA Vcc Stability