MD-171 High Stability GNSS (GPS and GLONASS) Disciplined Oscillator Module MD-171 The MD-171 is a Vectron GNSS disciplined module. It is a fully integrated GNSS disciplined oscillator module in a compact surface mount 40 x 50 mm footprint. The module has an embedded 34 channel receiver that is both GPS and GLONASS compatible and provides a sinewave or CMOS 10 MHz, and HCMOS 1 pps output. An onboard precision OCXO provides stabilities in the unlocked mode enabling extremely low holdover. The module operates from -40 oC to +85 oC. Features • • • • • • • Applications Embedded GNSS Receiver - GPS and Glonass Compatible Field upgradeable for Galileo in 2017 1pps HCMOS output signal standard 10MHz sinewave or CMOS output Modified NMEA (VSIP) Evaluation kit with software available 4ms holdover for 24 hours • • • • • Radar systems 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 1PPS Output RF Output 10 MHz Aux Input OCXO Figure 1. Functional Block Diagram Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com Summary Specifications Hold Over Performance Hold Over Time 10 min 1 hr Hold Over DT= Temperature Change 2 oC 1 1 hr 4 hr DT= DT= 2 oC 10 oC Model 4 hr 24hr 24 hr DT= DT= DT= DT= 2 oC 10 oC 2 oC 10 oC Maximum Accumulated Hold Over in us MD-1710-DAE-DAOC-10M0000000 0.1 0.15 4 0.6 10 4 15 Summary Performance Characteristics Model Warm Up Time (minutes) Aging / day (ppb)1 Temperature Stability (ppb) Module Height (mm) Accuracy to Accuracy MD-1710-DAE-DAOC-10M0000000 5 0.06 0.4 25 20 1E-12 4.5 10 kHz 100 kHz ADEV t=1s ADEV t=10s -145 -145 5e-12 5E-11 UTC (+/-1s) (ns)2 (+/-) 3 Warm Steady up State Power @ Power @ 25 oC 25 oC (W) (W) 2.8 Voltage (V) 5.0 V analog/ 3.3V digital Phase Noise/ ADEV at 10 MHz 10 Hz 100 Hz 1 kHz -125 -140 -145 1 Holdover (µs) 0.8 0.6 0.4 0.2 0 0 4 8 12 16 20 24 Time (Hours) Vectron International • 267 Lowell Road, Unit 102, 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 Galileo Firmware update will be required Tracking capability 12 satellites sensitivity tracking -161 dBm sensitivitiy acquisition -147 dBm Position Accuracy < 2.5 m CEP Open sky. 24 hours TTFF <5 seconds HOT (currrent almanac, position, time and ephemeris) <35 seconds Warm (current almanac, position, time) < 35 seconds Cold (no data) GPS Antenna Parameter Min Typical Max Units Antenna Input Voltage4 2.6 3.1 3.4 VDC 20 100 mA Antenna Current Condition see protocol for under current flag and short circuit protection RF Output Waveform Characteristics Waveform Sinewave Load Output Power 50 +3 Ω +5 +7 dBm Harmonics -30 dBc Spurious -80 dBc Waveform LVCMOS Load High-level output voltage (VOH) 15 pF 2.4 Low-level output voltage (VOL) Duty Cycle 45 VDC 15 pF ll 10k Ohm 0.4 VDC 15 pF ll 10k Ohm 55 % 15 pF ll 10k Ohm Units Condition 3.4 VDC > 100 Ohms 0.4 VDC > 100 Ohms 1pps Output Characteristics Parameter Min Typical Waveform High-level output voltage (VOH) Max LVCMOS 3.0 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 Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 3 Specifications Lock Status Indicator Parameter Min Typical Max Units Module Locked 90 100 %Vcc Module Not Locked 0 20 %Vcc Condition Module Hardware OK Indicator Module Hardware OK 90 100 %Vcc Module Hardware Failure 0 20 %Vcc Reset Module 0 Module Hardware Reset 0.5 VDC 2 kOhm internal pullup Serial Communications Interface Rx high-level input voltage (VIH) 2.8 Rx low-level input voltage (VIL) -0.5 0.0 Tx high-level output voltage (VOH) 3.15 3.3 Tx low-level output voltage (VOL) -0.2 0.0 Update rate VDC 0.5 VDC VDC 0.2 VDC 1 Communications Protocol Hz Vectron Binary/NMEA 0183 See VSIP Command List for Full Details Pulse width 10 Supply voltage (Vcc) +4.75 +5.0 +5.25 VDC Supply voltage (Dig Vcc) +3.0 +3.3 +3.4 VDC 7 uSec Supply Voltage Absolute Maximum Ratings Supply voltage (Vcc) 6 VDC Dc voltage on any I/O pin 3.9 VDC Output load 100 Ohms AC ripple 50 mVpk-pk 10Hz to 1MHz Environmental Conditions Parameter Min Typical Operating temperature Units Condition see ordering information for avaialble ranges Humidity @ 40˚C Storage Temperature Max -55 90 % +125 ˚C Physical Characteristics Weight g-sensitivity 120 1 g ppb/g 10 to 1000 Hz Vectron International • 267 Lowell Road, Unit 102, 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-171 family is capable of meeting the following qualification tests: Environmental Compliance Parameter Mechanical shock Mechanical vibration Resistance to solvents Conditions MIL-STD-202, Method 213 condition B Package Outline MIL-STD-202, Method 204 condition A MIL-STD-202, Method 215 Handling Precautions Although ESD protection circuitry has been designed into the MD-171 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 1.100 .500 1 .200 27 36 26 26 MARKING SURFACE .300 27 36 1 .100 TYP .900 .600 .600 .300 1.800 2.000±.015 .100 .500 .600 .900 13 1.600±.015 13 17 17 A .200 .900 .010 .065 .025 .050 DETAIL A SCALE 2.5 : 1 WARNING, this is a sketch and is not under revision control. An item documented in this manner must not be used in processes where using the wrong version could adversely affect the fit, form, or function of Vectron Product. Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 5 Pin Configuration 36 Pin I/O Connections Number Name Description/comment 1 PPS_OUT 1 pps output 2 REF_IN Reference input 3,5,7,20,26,36 D_GND Digital Ground 4 ANT_IN Antenna 6 VCC_ANT Antenna Supply 8,27 D_VCC Digital 3.3V supply 9,12,13,14,16,17,18,19 A_GND Analog Ground 10,11 A_VCC Analog 5.0V supply 15 RF_OUT Sinewave or CMOS (see ordering code) 21,22,29,32,33,34,35 N/C Do not connect - leave floating 23 RX_IN Data in - internal pull up 24 TX_OUT data out 25 AUXIO 28 MOD_RST Pull up - active low 30 STATUS pull down 31 LOCK pull down Ordering Information MD - 171 0 - DA E - DAOC - 10M0000000 Frequency Product Family MD: Precision Modules Embedded Oscillator DAOC (Digitally Assisted OCXO) Package 40 x 50mm Height 0: 23 mm Supply Voltage D: +5V 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 RF Output Code A: CMOS E: Sinewave 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 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. For Additional Information, Please Contact 7 USA: Vectron International 267 Lowell Road, Unit 102 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: 01-10-17dmc Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com 7