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 S H E E T 125 Series FTS250 Disciplined Oscillator Connor-Winfield’s GPS Disciplined Oscillators (GPSDOs) were created specifically for all precision timing and synchronization applications requiring higher end, cost sensitive solutions. By combining our uniquely designed GPS timing receivers with our high-quality oscillators, ConnorWinfield is able to offer a wide variety of superior, cost-effective GPS timing solutions. The 125 Series modules provide customer applications with the precise timing capabilities needed to optimize critical system performance. General Description The FTS250-010.0M Frequency and Time Standard module is a GPS driven, mixed-signal phase lock loop, providing a 1 PPS CMOS output from a Connor-Winfield GPS timing receiver. The FTS250 generates a 10 MHz CMOS and a 10 MHz SINE output from an intrinsically low jitter voltage controlled crystal oscillator. The FTS250 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 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). 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 •Temperature Range: -40°C to 85°C •Meets ITU-T G.811 Wander Generation Mask •SMA Bulkhead GPS Antenna Connection •Package: 28-pin Through-Hole •Physical Dimensions: 2.8” x 1.725” x 0.368” (71mm x 43.82mm x 9.34mm) •Fixed Position Unit Bulletin Revision Date Issued By SG176 03 07 May 2013 ENG Functional Block Diagram Figure 1 TCXO REFERENCE FTS250 Module SERIAL OUTPUT SMA Bulkhead Connector HOLDOVER STATUS LOCK STATUS ANTENNNA FAULT STATUS Wi125 (GPS Receiver) BOOT SEL 1 PPS CMOS OUTPUT SERIAL IN 33Ω 1 PPS ∆ GPS REF 10 MHz REF DPFD 1 PPS REF LOW JITTER VCXO or OCVCXO ANALOG FILTER CPLD RESET SYNC 1 CONTROL 1/N 10 MHz CMOS OUTPUT DRIVER SYNC 2 CONTROL 33Ω DISABLE DRIVER & TRANSLATION JTAG (Programming Only) Pin Description Table 1 Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 10 MHz SINE OUTPUT Pin Name Vcc2 GND *Reset *Disable 1 PPS Ref Input GND 10 MHz Ref Input NU NU NU NU *Bootsel GND Vcc1 Antenna Supply Voltage GND RXA TXA SYNC2 Control SYNC1 Control Lock Status Holdover Status Antenna Fault Status 1 PPS CMOS Output GND 10 MHz CMOS Output GND 10 MHz SINE Output Description Note 3.3V ±5% Supply Voltage for PLL and Interfacing Circuitry 1 Hardware Reset for GPS Circuitry. Pull low to Reset Open/High = Enabled Outputs. Low = Disabled Outputs External 1 PPS reference 2 2 2 External LVCMOS 10 MHz Reference Used for Factory Programming Used for Factory Programming Used for Factory Programming Used for Factory Programming Normally High - Pulled low during Wi125 software updates 2 3.3V ±5% Supply Voltage GPS Timing Circuitry 2.7 to 13.2V Input Supply Voltage for the Antenna. Max 45mA continuous current RS-232 Communication receive signal for UART-0 RS-232 Communication transmit signal for UART-0 Lock mode selection control signal 2 Lock mode selection control signal 1 High = Unit is locked to the selected reference High = Unit is in Holdover High = Fault detected on the Antenna Supply Voltage (Self Clearing) 1 PPS LVCMOS Output 2 2 2 2 2 2 10 MHz LVCMOS Output 2 10 MHz Sine Output (~9dBm) Note: 1. Provide a clean supply to this pin. Connecting to Vcc1 will degrade phase noise. 2. 3.3 VDC (LVCMOS) compatible. FTS250 Data Sheet #: SG176 Page 2 Rev: 03 Date: 05/07/13 © Copyright 2013 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 -40 85 °C 1 Operating Specifications Table 3 Symbol Parameter Minimum VCC1 Supply Voltage 1 3.135 ICC1 Supply Current 1 VCC2 Supply Voltage 2 3.135 ICC2 Supply Current 2 TO Temperature Range -40 tJTOL Input Jitter Tolerance 30 ns tAQ_GPS GPS Input Acquisition Time 100 sec 3 tAQ_EXT External Input Acquisition Time 100 sec 3 Nominal 3.3 Maximum Units Notes 3.465 V 2 A 0.200 3.465 V 0.036 3.3 A 85 °C O scillator Performance FCAP Capture/Pull-in Range ±10 ppm FBW Jitter Filter Bandwidth 0.8 Hz DC Duty Cycle 45/55 % RMS RMS Phase Noise 10 Hz - 2 MHz 12 kHz - 2 MHz 1.2 0.6 ps Holdover/Wander Generation Performance Frequency Stability Wander Generation Specification 2 ±0.32 ITU-T G.811 ppm 4 5 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. 5.Includes unidirectional temperature stability, Vcc stability, and 24 hours of aging. FTS250 Data Sheet #: SG176 Page 3 Rev: 03 Date: 05/07/13 © Copyright 2013 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice 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 10MHz reference will rail the PLL output until the reference returns or another mode is selected. Input And Output Characteristics Table 5 LVCMOS Inputs and Outputs Minimum Maximum Symbol Parameter Units VIH High Level Input Voltage 1.7 4.0 VIL Low Level Input Voltage -0.5 0.8 V VOH High Level Output Voltage 2.4 V Notes V VOL Low Level Output Voltage 0.4 V CO Output Capacitance 10 pF Symbol Parameter Load 50 ohms Output Power Total Harmonic Distortion 9 2.2 dBm % 10 MHz Sine Output Typical Table 6 Units Notes GPS Receiver Specifications 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 3 - RESET) The power-on-reset for the FTS250 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. FTS250 Data Sheet #: SG176 Page 4 Rev: 03 Date: 05/07/13 © Copyright 2013 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Table 7 Antenna Requirements Parameter Notes The FTS250 antenna connector is a SMA Bulkhead (female) The antenna supply voltage provided to Pin 15 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 Phase Noise Figure 2 Phase Noise: Offset Frequency (Hz) (dBc/Hz) 10 -90 (Typ) 100 -125 (Typ) 1k -138 (Typ) 10k -142 (Typ) 100k -150 (Typ) 1M -152 (Typ) FTS250 Data Sheet #: SG176 Page 5 Rev: 03 Date: 05/07/13 © Copyright 2013 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Allan Variance Figure 3 Wander Generation Plot – FTS250 versus G.811 Wander Generation Mask Figure 4 FTS250 Data Sheet #: SG176 Page 6 Rev: 03 Date: 05/07/13 © Copyright 2013 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 FTS250 after reflow processes are complete. Since the FTS250 does not have hermetic enclosure, hand cleaning the leads is recommended and the module should not be completely immersed. Package Dimensions Figure 5 Top View Dimensions & Keep-out Area Figure 6 FTS250 Data Sheet #: SG176 Page 7 Rev: 03 Date: 05/07/13 © Copyright 2013 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 FTS250 -010.0M Output Frequency Revision Date Note P00 01/19/10 Preliminary Release 00 06/14/10 125 Series Update and revised to release 01 05/27/11 Updated Block Diagram with Wi125 Receiver & Soldering Recommendations 02 01/03/12 Added Package & Physical Dimensions Information to Features 03 05/07/13 Storage Temp/Absolute Max Rating updated