Available at Digi-Key www.digikey.com 2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630- 851- 4722 Fax: 630- 851- 5040 www.conwin.com D A T A 125 Series FTS375 Disciplined Reference and Synchronous Clock Generator General Description The FTS375 module is a GPS driven, mixed-signal phase lock loop, providing a 1 PPS CMOS output from a ConnorWinfield GPS timing receiver and generating a 10 MHz CMOS and a 10 MHz SINE output from an intrinsically low jitter voltage controlled crystal oscillator. The FTS375 can lock to a 10 MHz reference derived from the on-board GPS receiver or an external 10 MHz reference or to an external 1 PPS reference. Alarms are provided to indicate Lossof-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). Features •Phase locked 10 MHz output •1 PPS output •3 selectable references: GPS, External 10 MHz or External 1 PPS •Holdover •Three alarm outputs. (Loss-of-Lock, Holdover and Antenna Fault) •Serial input and output ports (GPS receiver) •Master reset •+3.3 Volt power supply •Commercial Temp (0-70° C) •Mechanical Dimensions: 3.937” x 1.969” x 0.708” (100mm x 50mm x 17.98mm) S H E E •Package: 36-pin Through-Hole •Fixed Position Unit T Functional Block Diagram Figure 1 OCXO REFERENCE FTS375 Module SERIAL OUTPUT (A, B) MCX Connector BOOT SEL HOLDOVER STATUS LOCK STATUS ANTENNNA FAULT STATUS Wi125 (GPS Receiver) 1 PPS CMOS OUTPUT SERIAL IN (A, B) 33Ω 1 PPS ∆ GPS REF 10 MHz REF LOW JITTER DPFD 1 PPS REF Bulletin Revision Date Issued By SG174 02 03 Jan 12 ENG RESET SYNC 1 CONTROL SYNC 2 CONTROL DISABLE JTAG (Programming Only) CPLD ANALOG FILTER OCVCXO 1/N DRIVER 33Ω DRIVER & TRANSLATION 10 MHz CMOS OUTPUT 10 MHz SINE OUTPUT Pin Description Table 1 Pin # 1 Pin Name 1 PPS Ref Input 2 GND 3 10 MHz Ref Input Description Ground Externally provided LVCMOS 10 MHz reference 4 No Connect Used for factory programming 5 10 MHz CMOS Output 10 MHz low jitter CMOS output 6 GND 7 10 MHz Sine Output 8 No Connect Used for factory programming 9 No Connect Used for factory programming 10 No Connect Used for factory programming 11 *Reset 12 TXA RS-232 transmit signal for UART0 13 TXB RS-232 transmit signal for UART1 14 GND Ground 15 RXA RS-232 receive signal for UART0 16 RXB RS-232 receive signal for UART1 17 GND Ground 18 *Bootsel 19 GND 20 Antenna Supply Voltage 21 Vcc1 3.3V supply voltage for the GPS circuitry 22 GND Ground 23 Unused 24 Unused 27 Antenna Fault Status Note Externally provided LVCMOS 1 PPS reference Ground 10 MHz AC coupled low jitter SINE output Pull low to reset GPS receiver Normally high. Pull low to reprogram the GPS receiver Ground Antenna Supply voltage. Limit continuous current to 45mA Spare CPLD connection Spare CPLD connection High = A fault has been detected on pin 20 (Ant Supply Voltage) 28 1 PPS Out 29 Lock Status 1 PPS CMOS output 30 Holdover Status High = Unit is in holdover 31 SYNC2 Control Lock mode control signal 32 SYNC1 Control Lock mode control signal High = Unit is locked to the selected reference 33 Unused Spare CPLD connection 34 *Disable Pull low to disable the 10 MHz CMOS and SINE outputs 35 GND Ground 36 Vcc2 3.3V supply voltage for PLL and interfacing circuitry Note: Vcc1 and Vcc2 should not be connected; otherwise phase noise performance will degrade. FTS375 Data Sheet #: SG174 Page 2 of 8 Rev: 02 Date: 01/03/12 © Copyright 2012 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Absolute Maximum Rating Table 2 Symbol Parameter Minimum Maximum Units N otes VCC Power Supply Voltage -0.3 3.7 Volts 1 VIN Input Voltage -0.3 4.6 Volts 1 VPREAMP Antenna Supply Voltage 2.7 13.2 Volts 1 TS Storage Temperature -30 80 °C 1 Operating Specifications Table 3 Symbol Parameter VCC1 Supply Voltage 1 ICC1 Supply Current 1 VCC2 Supply Voltage 2 ICC2 Supply Current 2 TO Temperature Range tJTOL Input Jitter Tolerance tAQ_GPS GPS Input Acquisition Time Minimum Nominal Maximum 3.135 3.3 3.465 V .480 1.2 A 3.135 3.3 3.465 V .380 1.0 A 0 70 °C 30 ns 150 sec 3 120 sec 3 tAQ_EXT External Input Acquisition Time Oscillator Performance FCAP Capture/Pull-in Range ±45 ppb FBW Jitter Filter Bandwidth 0.1 Hz Typ. DC Duty Cycle 45/55% RMS RMS Phase Noise 10 Hz - 2 MHz 12 kHz - 2 MHz 1 ps Typ. 0.6 ps Typ. Holdover/Wander Generation Performance TSTA Temperature Stability ±20 ppb VSTA Vcc Stability ±5 ppb ADAILY Daily Aging 2 ppb AYEARLY Yearly Aging 80 ppb Wander Generation Specification ETSI-PRC Units Notes 2 4 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 continuous year in Holdover. Mode Control Table Table 4 SYNC 1 0 0 1 1 SYNC 2 0 1 0 1 Operating Mode Force Holdover Lock to External 10 MHz reference* Lock to External 1 PPS reference (Default) Lock to GPS Signal * Note: Holdover is not supported in this mode; loss of the 10 MHz reference will rail the PLL output until the reference returns or another mode is selected FTS375 Data Sheet #: SG174 Page 3 of Rev: 02 Date: 01/03/12 © Copyright 2012 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Input And Output Characteristics Table 5 LVCMOS Inputs and Outputs Minimum Maximum Symbol Parameter VIH High Level Input Voltage 1.7 4.0 V VIL Low Level Input Voltage -0.5 0.8 V VOH High Level Output Voltage 2.4 V VOL Low Level Output Voltage 0.4 V CO Output Capacitance 10 pF Symbol Parameter Load Output Power Total Harmonic Distortion 10MHz Sine Output Typical Units Units 50 ohms 9 dBm 2.2 % Notes Notes GPS Receiver Specifications Table 6 Parameter Specifications Acquisition/Tracking Sensitivity -155dBm/-156dBm Notes Acquisition Time: Hot Start w/ Network Assist Outdoor: <2 sec Indoor: (-148dBm) <5 sec Stand Alone Supported Protocols Cold: <45 sec Warm: <38 sec Hot: <5 sec Re-acquisition: <1sec (90% confidence) Network Assist, NMEA 0183 Reset Generation (I/O pin 11 - RESET) The power-on-reset for the FTS375 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. Table 7 Antenna Requirements Parameter Notes The FTS375 antenna connector is an MCX (female) The antenna supply voltage provided to Pin 20 must be within the range of 2.7 to 13.2V (AMR); the antenna must be able to operate at this voltage The antenna’s continuous current draw must be <=45mA The antenna must have a full sky view for optimal receiver performance An active antenna with a minimum 10dB gain (including cable loss) should be used Standard 125 Series models are designed for fixed position operation only. Contact Connor-Winfield Sales for mobile application model offerings FTS375 Data Sheet #: SG174 Page 4 of 8 Rev: 02 Date: 01/03/12 © Copyright 2012 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Phase Noise Figure 2 Phase Noise: Offset Frequency (Hz) Typical (dBc / Hz) 10 -115 100 -135 1k -143 10k -148 100k -152 1M -153 FTS375 Lock to GPS, Sine Output FTS375 10 MHz SINE Output FTS375 Data Sheet #: SG174 Page 5 of Rev: 02 Date: 01/03/12 © Copyright 2012 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Soldering and Cleaning Recommendations Hand solder, leaded wave solder, and lead-free wave solder processes are recommended for attaching the FTS375 after reflow processes are complete. Since the FTS375 does not have hermetic enclosure, hand cleaning the leads is recommended and the module should not be completely immersed. Package Dimensions Figure 3 Package Dimensions Top View and Keep out Area Figure 4 FTS375 Data Sheet #: SG174 Page 6 of 8 Rev: 02 Date: 01/03/12 © Copyright 2012 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice FTS375 Modified Allan Deviation Figure 5 FTS375 Wander Generation Plot Figure 6 FTS375 Data Sheet #: SG174 Page 7 of Rev: 02 Date: 01/03/12 © Copyright 2012 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Available at Digi-Key www.digikey.com 2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630- 851- 4722 Fax: 630- 851- 5040 www.conwin.com Ordering Information FTS375 -010.0M Output Frequency Revision Date Note P00 1/06/10 Preliminary Release 00 06/16/10 125 Series Update and revise to release 01 05/27/11 Updated Block Diagram with Wi125 Receiver & Soldering Recommendation 02 01/03/12 Added Package Information to Features