MD-261 GNSS (GPS and GLONASS) Disciplined Oscillator Module MD-261 The MD-261 is a fully integrated GNSS disciplined oscillator module in a compact surface mount 25 x 20 mm package. The module has an embedded 34 channel receiver that is both GPS and GLONASS compatible. and provides an HCMOS 10 MHz and and 1 pps output. An onboard OCXO or High Precision TCXO are available dependent on performance requirements. The module operates from -40 oC to +85 oC, and is capable of providing a holdover of 1.5 us over 4 hours over a +/-2oC temperature window. An evaluation kit with operating software is available for development purposes. Features • • • • • • • • • Applications Embedded GNSS Receiver - GPS and Glonass Compatible Field upgradeable for Galileo 1pps HCMOS output signals standard 10MHz HCMOS output standard 1 pps auxiliary input Other output frequencies available Modified NMEA (VSIP) Holdover to 1.5 us over 4 hours, 8 us over 24 hours Evaluation kit with software available • • • • • LTE Digital Video Broadcast E911 Location Systems General Timing and Synchronization Military Radio Block Diagram Serial Communications Interface Output Locked Module Status Hardware Reset Antenna Input GPS Receiver Processor/ Controller Output Frequency Generation Aux Input OCXO Figure 1. Functional Block Diagram Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 1PPS Output RF Output 10 MHz Summary Specifications Comparitive Performance of Standard Modules Model Embedded Oscillator Typical Uses MD-2610-EXE-OCXO-10M0000000 OCXO Applications requiring a GPS disciplined clock with holdover below 1.5 us in 4 hours Precision TCXO MD-2610-EXJ-HPTC-10M0000000 Applications requiring 50 ppb stability when not disciplined to GPS Hold Over Performance 1 Hold Over Time 10 min 1 hr 1 hr 4 hr 4 hr 24hr 24 hr Hold Over DT= DT= DT= DT= DT= DT= DT= Temperature Change 2 C 2 C 10 C 2 C 10 C 2 C 10 oC o o Model o o o o Maximum Accumulated Hold Over in us MD-2610-EXE-OCXO-10M0000000 .03 0.3 1 1.5 4 8 20 MD-2610-EXJ-HPTC-10M0000000 3 40 75 100 300 1000 2500 Summary Performance Characteristics Model Warm Up Time (minutes) Aging / day (ppb)1 Temperature Stability (ppb)1 Module Height (mm) 1 pps precision (rms)2 (ns) Accuracy at 24 hours3 Warm up Power @ 25 oC (W) Steady State Power @ 25 oC (W) Voltage (V) MD-2610-EXE-OCXO-10M0000000 5 0.2 1 ppb (-10 to 85oC) 14 20 1E-12 3.5 1.5 3.3 14 100 1E-10 0.33 0.33 3.3 4 ppb (-40 to -10oC) MD-2610-EXJ-HPTC-10M0000000 5 10 50 Phase Noise/ AVAR -10 Hz -100 Hz -1 kHz -10 kHz -100 kHz AVAR (t=1s) AVAR (t=10s) MD-2610-EXE-OCXO-10M0000000 -120 -130 -145 -150 -150 3E-11 5E-11 MD-2610-EXJ-HPTC-10M0000000 -90 -115 -140 -155 -155 5E-10 5E-10 4 Holdover (µs) 3.5 3 2.5 2 1.5 1 0.5 0 0 4 8 12 16 20 24 Time (Hours) Measured accumulated phase error at 25 oC Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 2 Specifications Internal Receiver Characteristics Parameter Condition Type Timimg w/ Auto Position Lock Number of channels 34 Frequency band GPS L1 C/A SBAS L1 C/A WAAS, MSAS, EGNOS, GAGAN GLONASS L1 OF Galilieo Firmware update will be required Tracking capability 12 satellites - GPS 34 satellites all GNSS source Position Accuracy < 2.5 m CEP Open sky. 24 hours TTFF (receiver - position only) <5 seconds HOT (currrent almanac, position, time and ephemeris) <35 seconds Warm (current almanac, position, time) < 35 seconds Cold (no data) GPS Antenna Parameter Antenna Voltage 4 Min Typical Max Units Condition 0 3.3 5.5 VDC 3.3 or 5V antenna operation supported pin 21 20 100 mA see protocol for short circuit protection Antenna Current RF Output Waveform Characteristics Waveform High Level Output Voltage (VOH) LVCMOS 90 100 %Vcc Low Level Output Voltage (VOL) 0.0 20 %Vcc Rise/Fall Time 3 5 nSec 15 pFll10kOhm 50 60 % 15 pFll10kOhm Units Condition 100 %Vcc 15 pFll10kOhm 20 %Vcc 15 pFll10kOhm Duty Cycle 40 1pps Output Characteristics Parameter Min Typical Waveform High-level output voltage (VOH) Max LVCMOS 90 Low-level output voltage (VOL) 0.0 Pulse Width 10 us Aux 1pps input Characteristics Parameter Min Typical Waveform High-level input voltage (ViH) Low-level input voltage (VIL) Max Units Condition 5 VDC 15 pFll10kOhm 0.3 VDC 15 pFll10kOhm LVCMOS, TTL 2.4 0.0 3 Specifications Lock Status Indicator Parameter Min Module Locked Module Not Locked Typical Max Units Condition 90 100 %Vcc 15 pFll10kOhm 0 20 %Vcc 15 pFll10kOhm Module Hardware OK Indicator Module Hardware OK 90 100 %Vcc 15 pFll10kOhm Module Hardware Failure 0 20 %Vcc 15 pFll10kOhm VDC 10 kOhm internal pullup Module Hardware Reset Reset Module 0 0.5 Serial Communications Interface Rx high-level input voltage (VIH) 90 100 %Vcc Rx low-level input voltage (VIL) 0 20 %Vcc Tx high-level output voltage (VOH) 90 100 %Vcc Tx low-level output voltage (VOL) 0 Baud rate 20 115.2 Communications Protocol %Vcc kBaud Vectron Binary/NMEA 0183 Pulse width 10 Supply voltage (Vcc) +3.15 8N1 See VSIP Command List for Full Details usec Supply Voltage +3.3 +3.4 VDC Absolute Maximum Ratings Supply voltage (Vcc) 3.5 Dc voltage on any I/O pin Output load VDC 4.0 1 VDC kOhms AC ripple 50 mVpk-pk 10Hz to 1MHz Environmental Conditions Parameter Min Operating temperature Max Units Condition see ordering information for avaialble ranges Humidity @ 40˚C Storage Temperature Typical -55 90 % +125 ˚C Physical Characteristics 120 g Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 4 Specifications Reliability VI qualification includes aging various extreme temperatures, shock and vibration, temperature cycling, and IR reflow simulation. The MD-261 family is capable of meeting the following qualification tests: Environmental Compliance Parameter Conditions MIL-STD-202, Method 213 condition B Package Outline Mechanical shock Mechanical vibration Resistance to solvents MIL-STD-202, Method 204 condition A MIL-STD-202, Method 215 Handling Precautions Although ESD protection circuitry has been designed into the MD-261 proper precautions should be taken when handling and mounting. VI employs a human body model (HBM) and a charged-device model (CDM) for ESD susceptibility testing and design protection evaluation. ESD Ratings Model Minimum Conditions Human body model 1500 V MIL-STD-833, Method 3015 Charged device model 1000 V JEDEC, JESD22-C101 Package Outline 21 Pin I/O Connections .600 MAX .062 1.000 .850 .300 .065 (11X) .450 .100 16 .100 KEEP OUT AREA 21 .050 (10X) 1 .200 .100 .450 .500 .300 .100 .300 .100 .200 R.013 .250 10 .100 .800 Name 1,2 Vcc Description Power Supply 3,4,5,7,10,15,18,20 GND Module Ground 6 RFOUT HCMOSRF Output 8 Rx Serial Communications Receive 9 Tx Serial Communications Transmit Do not connect - Float 11 Reserved 12 Reset Hardware reset 13 Status Logic low = Failure with module operation 14 Locked Logic-high = Output locked to GPS 16 PPS Out Pulse Per Second Out 17 PPS in LVCMOS, LVTTL 19 ANT GPS antenna input 21 VCC ANT Active Antenna Supply .075 (10X) R.013 R.012 .400 Number 5 .200 Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 5 Accessories Vectron Partnumber Description MD-261-EK MD-261X-XXX-XXXX Module with Evaluation Kit Ordering Information Instructions The MD-261 series of GNSS disciplined oscillators has multiple options with embedded OCXOs and TCXOs. Options are created to optimize customer hold over requirements while meeting pricing needs. Customization to unique customer requirements is available and is common for this level of integration. Common customizations include alternate output frequencies, temperature ranges, differing values and methods of hold over specification. Not all combinations of codes are available. Ordering Information MD - 261 0 - E X E - OCXO - 10M0000000 Frequency Product Family MD: Precision Modules Embedded Oscillator HPTC (High Precision TCXO) OCXO (Oven Controlled XO) Package 20x25.4 mm Height 0: 14 mm Supply Voltage E: +3.3 V RF Output Code X: standard outputs per specification Temperature Range D: -40°C to +70°C E: -40°C to +85°C J: -20°C to +70°C T: 0°C to +70°C Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 6 Notes 1) Holdover and aging performance is after 7 days of power-on time. Temperature and aging rates are when device is not locked. Performance measured in still air. 1 ppb temperature stability is measured in factory, however due to internal heating and variations in airflow, -40 to -10 oC values vary in the differing environments . The MD-2610-EXE-OCXO-10M0000 may vary by as much as 4ppb, unlocked, ove 2) After customer applies offset corrected using cable delay command while locked, after 24 hours of locked operation 3) Allan Variance at t=86400s while locked, after 24 hours of locked operation 4) Antenna supply pin at pin 21 is an input voltage from customer. Vectron couples the DC input voltage to the rf signal of the GPS signal. The customer does not need to provide any additional blocking or coupling circuitry. Application Notes For Additional Information, Please Contact 7 USA: Vectron International 267 Lowell Road Hudson, NH 03051 Tel: 1.888.328.7661 Fax: 1.888.329.8328 Europe: Vectron International Landstrasse, D-74924 Neckarbischofsheim, Germany Tel: +49 (0) 7268.801.100 Fax: +49 (0) 7268.801.282 Asia: Vectron International 1F-2F, No 8 Workshop, No 308 Fenju Road WaiGaoQiao Free Trade Zone Pudong, Shanghai, China 200131 Tel: 86.21.5048.0777 Fax: 86.21.5048.1881 Disclaimer Vectron International reserves the right to make changes to the product(s) and or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. Rev: 10222016dmc Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 7