Vectron MD-261 Gnss disciplined oscillator Datasheet

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
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•
•
•
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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
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