Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
1
Product Datasheet
ALT-PDT-DOC Revision 1.61
September 1, 2011
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
2
Table of Contents
1 General Description .............................................................................................................5
2 Features ................................................................................................................................5
2.1 Pin Definition .................................................................................................................. 6
2.2 Pin Configuration ............................................................................................................ 7
2.3 System Block Diagram .................................................................................................... 8
3 Specifications.......................................................................................................................8
3.1 Clock Frequency ............................................................................................................. 8
3.2 Interfaces ....................................................................................................................... 9
3.2.1 Host UART Interface ................................................................................................ 9
3.2.2 Wake Up Pin ........................................................................................................... 9
3.2.3 Time Mark ............................................................................................................... 9
3.3 GPS Power On/Off........................................................................................................ 10
4 WAAS with SBAS or Wide Area Differential GPS..........................................................10
4.1 Differential GPS ............................................................................................................ 10
4.2 Wide Area DGPS or WAAS ........................................................................................... 11
4.3 How do we enable WAAS-SBAS on the W2SG0084i?..................................................... 13
5 NMEA Input Messages......................................................................................................14
6 One Socket Protocol (OSP) Messages (Formerly SiRF Binary I/O).................................15
6.1 OSP Output Messages .................................................................................................. 15
6.2 OSP Input Messages .................................................................................................... 16
7 Electrical/RF Characteristics: Operating ...........................................................................17
7.1 Performance ................................................................................................................. 18
7.1.1 Acquisition Time: ................................................................................................... 18
7.1.2 Position Accuracy (3-D NAV): ................................................................................. 18
7.2 Environmental Characteristics........................................................................................ 19
7.3 Antenna ....................................................................................................................... 19
8 Development Support ........................................................................................................19
9 Mechanical Information.....................................................................................................20
9.1 Mechanical Specification: .............................................................................................. 20
9.2 Outline Drawing: ........................................................................................................... 20
9.3 Recommended Reflow Profile: ....................................................................................... 21
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
3
10 Part Order Options .............................................................................................................22
11 Disclaimers ........................................................................................................................22
11.1 Data Sheet Status ......................................................................................................... 22
12 Certifications......................................................................................................................22
13 References..........................................................................................................................23
13.1 Specifications ............................................................................................................... 23
13.2 Trademarks, Patents and Licenses ................................................................................ 23
13.3 Other............................................................................................................................ 23
List of Figures:
Figure 1: Pin Configuration (Bottom View) 7
Figure 2: System Block Diagram 8
Figure 3 Timing Diagram of initial application of power supply 9
Figure 4 Traditional DGPS System 10
Figure 5 SBAS Example System 13
Figure 6: Package Outline Drawing 20
Figure 7: Recommended Reflow Profile 21
List of Tables:
Table 1: Pin Definition................................................................................................................ 6
Table 2: Absolute Maximum Ratings ......................................................................................... 8
Table 3: NMEA Input Messages............................................................................................... 14
Table 4: OSP Output Messages ................................................................................................ 15
Table 5: OSP Input Messages ................................................................................................... 16
Table 6: Operating Electrical Characteristics ........................................................................... 17
Table 7: Average Time to First Fix........................................................................................... 18
Table 8: Positional Accuracy .................................................................................................... 18
Table 9: Environmental Characteristics .................................................................................... 19
Table 10: Mechanical Characteristics ....................................................................................... 20
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
4
Revision History
Rev.
Revision Date
Originator
Changes
1.0
June 12, 2010
Will Lumpkins
Initial draft
1.1
June 23, 2010
Will Lumpkins
Added current source for 1.8V Output
1.2
June 29, 2010
Will Lumpkins
Added missing figures
1.21
Sept 30, 2010
Will Lumpkins
Added missing Block diagrams
1.3
Oct 10, 2010
Will Lumpkins
Added Wakeup, timing diagram, Receiver
Sensitivity data
1.4
Oct 20, 2010
Will Lumpkins
Added SRESET Pin label & WAAS-SBAS
1.45
Dec 2, 2010
Will Lumpkins
Added SRESET description
1.6
Aug 29, 2011
WJL, SK, EK
Added Ordering Options, Updated Pin List,
SRESET, Time Mark
1.61
Nov 11, 2011
WJL
Removed SRESET
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
5
1 General Description
This specification provides a general guideline on the performance and the integration of the Wi2Wi,
Inc. NAVSTAR L1C/A Band, 48 Channel GPS Receiver Module Solution. The solder-down module,
W2SG0084i which is a drop in replacement for the W2SG0004, is targeted to assist companies to
easily integrate GPS functionally into their products. This is accomplished by reducing their
development times and cost by using a complete, small form factor, low power, ready to integrate GPS
Receiver System Solution.
The specification maximum and minimum limits presented herein are those guaranteed when the unit
is integrated into the Wi2Wi, Inc. Development System. These limits are to serve as the representative
performance characteristics of the when properly designed into a customer’s product. Wi2Wi makes
no warranty, implied or otherwise specified, with respect to the customer’s design and the performance
characteristics presented in this specification.
2 Features
The W2SG0084i is a 48 Verification Channel Global Position System (GPS) receiver surface mount
device (SMD) solution. Based upon the SiRFstar IV™ technology, the SMD features fast acquisition
times, high receiver sensitivity and low power consumption in a small, compact form factor. The
W2SG0084i is a flexible design that supports a broad range of applications where GPS functionality
and location based services is required.
Key features are as follows:
GPS technology based upon by the CSR/SiRF™ SiRFStar IV™
Compact design for easy integration: 11.2mm x 12mm x 2.5mm
Fast acquisition time and high sensitivity GPS Receiver
High sensitivity navigation engine (PVT) tracks as low as -163dBm
Ultra-low power consumption (Only 50 to 500μA maintains hot start capability)
Surface Mount Design (SMD)
50Ω Antenna Launch
48 verification channel GPS receiver
Active Jammer Remover:
o Removes in-band jammers up to 80 dB-Hz
o Tracks up to 8 CW jammers
Uses NAVSTAR GPS L1 C/A signal
Single 3.3 VDC supply input
UART Interface (4800 BAUD Default)
Auto Start Option: Immediate tracking after power up (see part order options)
Format Selectable Output Data: NMEA and OSP™
RoHS Compliant
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
6
2.1 Pin Definition
The functional pin definition for the W2SG0084i is presented below in Table 1.
Table 1: Pin Definition
1
GND
PWR
Ground
2
3V3_IN
PWR
3.3V Power supply
3
TXFER
I
Time Aiding input, 1.8V; Leave unconnected if it is
not used
4
FXFER
I
Frequency Aiding input, 1.8V; Leave unconnected if it
is not used
5
Time Mark
O
Time Mark output; Leave unconnected if it is not used
6
WAKEUP
O
GPS is ready for full power mode
7
Reserved
NC
Reserved No Connect
8
GPS_ON/OFF
I
Power On enabled by a rising edge or by interrupt,
Power Off through software command 1.8V level
9
GND
PWR
Ground
10
3V3_IN
PWR
3.3V Power supply
11
1V8_OUT
O
Regulator Output, 1.8V; Can source 10mA
12
GPS_RX
I
UART Receive input port, 1.8V (9600 BAUD)
13
GPS_TX
O
UART Transmit output port, 1.8V (9600 BAUD)
14
GND
PWR
Ground
15
GND
PWR
Ground
16
GND
PWR
Ground
17
GND
PWR
Ground
18
ANT_IN
I
Antenna RF input (50 ohm impedance) 10dB max
19
GND
PWR
Ground
20
3V3_ANT
PWR
Active antenna bias input; Connect to 3.3V if using
active antenna; Leave it unconnected if using passive
antenna
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
7
2.2 Pin Configuration
The W2SG0084i is a 20 pin SMD device with a board down antenna connection. The pin
configuration is presented below in
Figure 1.
Figure 1: Pin Configuration (Bottom View)
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
8
2.3 System Block Diagram
The System Block for the W2SG0084i is presented below in Figure 2.
Figure 2: System Block Diagram
The W2SG0084i provides an internal LNA, all required power regulation, and clocking. The
TTL UART Interface is accessed via Pin 12 and 13.
3 Specifications
3.1 Clock Frequency
The W2SG0084i features an internal clock and crystal and requires no external clock sources.
Absolute Maximums Ratings
The values presented below in Table 2 are those parameters beyond which permanent damage could
result. These values do not imply functional operation and should be considered as stress ratings only.
Table 2: Absolute Maximum Ratings
Parameter
Symbol
Rating
Units
Power Supply
Input Voltage
VDD
5.5
V
RF Input
RFIN
10
dBm
Case Temperature
TCASE
C°
Lead Temperature (Soldering, 10sec)
TMFG
260
C°
Operating Temperature Range
TA
-40 to +85
C°
Storage Temperature Range
TS
-40 to +150
C°
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
9
3.2 Interfaces
3.2.1 Host UART Interface
The TTL UART Interface (Pins 12, 13) has a bit rate range of 1.2kbps to 115.2 kbps, though defaulted
at 4800 BAUD. Protocol options for the W2SG0084i are NMEA and SiRFBINARY™ (OSP). Default
setting for the UART Interface is 4800 BAUD/NMEA Protocol. Initial Power-On sequence
Figure 3: Timing Diagram of initial application of power supply
3.2.2 Wake Up Pin
The Wake up pin functions as follows: A short pulse on the WAKEUP output line indicates to
a host that the W2SG0084i is ready to accept an ON_OFF pulse to start normal operation.
When the module is in standby or hibernate mode, the WAKEUP output goes low and when
the module is in Full power mode the WAKEUP output goes high.
3.2.3 Time Mark
The Time Mark pin [5] functions as follows: the Time Mark output provides a one pulse-per-
second (1pps) signal to the customer’s application processor. When the receiver provides a
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
10
valid navigation solution which consists of five satellite vehicles, the rising edge of each
TMARK pulse is synchronized with the UTC one second epochs to within ±1 microsecond.
The receiver software produces a binary format data message containing the UTC time
associated with each time mark pulse. The relationship between the UTC Time Mark Pulse
Output message and the TMARK pulse is shown in Figure x. When the receiver’s serial data
communication port is set to 9600 bps, the UTC Time Mark Pulse Output message precedes
the TMARK pulse by xxx milliseconds (typically). The TMARK pulse waveform is shown in
Figure x. This signal is a positive logic, buffered CMOS level output pulse that transitions
from a logic “low” condition to a logic “high” at a 1 Hz rate. The TMARK output pulse rise
time is typically less than 2 nanoseconds and the pulse duration is typically 200 milliseconds.
Patch Option:
A patch exists that allows the Time Mark to output the 1 PPS with only four satellite vehicles
instead of the default of five satellites. This patch can be downloaded from the Wi2Wi
Extranet and implemented with the GPS patch manager that will run on Windows 7tm and
Linux operating systems. Please register at www.wi2iw.com .
3.3 GPS Power On/Off
To enable GPS or to turn off GPS a positive pulse for two RTC ticks (62uS) after the Receiver
has stabilized after a Fix. This can be verified with a message ID 18, called “OK to Send”,
that comes out when the receiver is receptive to commands.
4 WAAS with SBAS or Wide Area Differential GPS
4.1 Differential GPS
Differential GPS (DGPS) is traditionally used with the fix of three to four satellites and the
secondary fix from ground based GPS receiver based stations that retransmit the secondary fix
via VHF/UHF and occasionally FM. DGPS can achieve positional accuracies of between 60
cm ~ 10 cm’s. See Figure 4
Figure 4 Traditional DGPS System
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
11
DGPS requires at least two antennas, one for the NavStar L1 CA signal from the satellite and
one antenna for the secondary fix from the VHF/UHF/FM transmitter. Also a secondary
application processor is used to perform “Mixing” calculations between the two fixes. This
increases the size and the expense of the system.
4.2 Wide Area DGPS or WAAS
Wide Area DGPS or WAAS (Wide Area Augmentation System) uses the same concept but
eliminates the need for the secondary RF signal. It accomplishes this by reusing the already
orbiting satellites to re-broadcast other secondary fixes that have been established by ground
based master stations in North America and Hawaii, to measure small variations in the GPS
satellites' signals in the western Hemisphere. Measurements from the reference stations are
routed to master stations, which queue the received Deviation Correction (DC) and send the
correction messages to geostationary WAAS satellites in a timely manner (every 5 seconds or
better). These master stations rebroadcast the secondary fix to the NavStar satellites which
broadcast the secondary fix on unused channel space. This enables a GPS receiver to utilize
the same antenna to reprocess both fixes internal to it also eliminating the need for a
secondary application processor. WAAS enables a GPS receiver to provide positional
accuracy to 300 cm ~ 200 cm. Of course a GPS receiver utilizing WAAS will need an
expanded offering of GPS receiver channels to effective use this feature like the W2SG0084i
which has 48 channels available for this function.
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
12
As noted this system was originally developed for the U.S. and Northern Hemisphere
Geography. As GPS became ubiquitous in technology use throughout the world, similar
systems called generically as Satellite-Based Augmentation System (SBAS). A SBAS is a
system that supports wide-area or regional augmentation through the use of additional
satellite-broadcast messages. Such systems are commonly composed of multiple ground
stations, located at accurately-surveyed points. The ground stations take measurements of one
or more of the GNSS satellites, the satellite signals, or other environmental factors which may
impact the signal received by the users. Using these measurements, information messages are
created and sent to one or more satellites for broadcast to the end users.
While SBAS designs and implementations may vary widely, with SBAS being a
general term referring to any such satellite-based augmentation system, under the International
Civil Aviation Organization (ICAO) rules a SBAS must transmit a specific message format
and frequency which matches the design of the United State’s Wide Area Augmentation
System. See Figure 5
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
13
Figure 5 SBAS Example System
Some examples of these are (GPS Aided GEO Augmented Navigation) GAGAN
developed for the Indian Sub-Continent, European Geostationary Navigation Overlay Service
(EGNOS) developed for the European Union, and the Japanese Multi-functional Satellite
Augmentation System (MSAS), respectively.
4.3 How do we enable WAAS-SBAS on the W2SG0084i?
WAAS-SBAS is enabled by issuing Message ID 133, (MID 133) is supported in One Socket
Protocol (Formerly Sirf Binary Protocol mode), and then the accuracy improves to 300 cm ~
100 cm with it enabled, depending on Open Sky Conditions (Multi-Path interference). With
MID 133 not enabled, the accuracy is near 1500cm.
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
14
5 NMEA Input Messages
The NMEA messages used to control the W2SG00084i modules are listed in
Table 3. Messages 100 to 106 are OSP NMEA messages. The MSK NMEA string is as defined by the
NMEA 0183 standard. See NMEA Reference Manual (CS-129435-MA-1) for further detail.
Table 3: NMEA Input Messages
Message Message ID Description
SetSerialPort 100 Set PORT A parameters and protocol
NavigationInitialization 101 Parameters required for start using X/Y/Z
SetDGPSPort 102 Set PORT B parameters for DGPS input
Query/Rate Control 103 Query standard NMEA message and/or set output rate
LLANavigationInitialization 104 Parameters required for start using Lat/Lon/Alt
Development Data On/Off 105 Development Data messages On/Off
Select Datum 106 Selection of datum to be used for coordinate transformations
Extended Ephemeris Proprietary 1 107 Extended Ephemeris Proprietary message
Extended Ephemeris Proprietary 2 108 Extended Ephemeris Proprietary message
Extended Ephemeris Debug 110 Extended Ephemeris Debug
MSK Receiver Interface MSK Command message to a MSK radio-beacon receiver
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
15
6 One Socket Protocol (OSP) Messages (Formerly SiRF Binary I/O)
6.1 OSP Output Messages
OSP Output Messages generated by the W2SG0084i are listed in Table 4. Please note that the support
of individual commands is dependent upon the firmware loaded in the module.
Table 4: OSP Output Messages
Hex Decimal Name Description
01 1
Reference Navigation Data Not Implemented
02 2
Measured Navigation Data Position, velocity, and time
03 3
True Tracker Data Not Implemented
04 4
Measured Tracking Data Satellite and C/No information
05 5
Raw Track Data Not supported by SiRFstarII
06 6
SW Version Receiver software
07 7
Clock Status Current clock status
08 8
50 BPS Subframe Data Standard ICD format
09 9
Throughput Navigation complete data
0A 10
Error ID Error coding for message failure
0B 11
Command Acknowledgment Successful request
0C 12
Command NAcknowledgment Unsuccessful request
0D 13
Visible List Auto Output
0E 14
Almanac Data Response to poll
0F 15
Ephemeris Data Response to poll
10 16
Test Mode 1 For use with SiRFtest (Test Mode 1)
11 17
Differential Corrections Received from DGPS broadcast
12 18
OkToSend CPU ON / OFF (TricklePower)
13 19
Navigation Parameters Response to Poll
14 20
Test Mode 2/3/4 Test Mode 2, 3, or 4 test data
1B 27
DGPS Status Differential GPS status information
1C 28
Nav. Lib. Measurement Data Measurement data
1D 29
Nav. Lib. DGPS Data Differential GPS data
1E 30
Nav. Lib. SV State Data Satellite state data
1F 31
Nav. Lib. Initialization Data Initialization data
29 41
Geodetic Navigation Data Geodetic navigation information
2B 43
Queue Command Parameters Command parameters
2D 45
Raw DR Data Raw DR data from ADC
2E 46
Test Mode 3 Additional test data (Test Mode 3)
30 48
Test Mode 4 for SiRFLoc v2.x only Additional test data (Test Mode 4)
30 48
SiRFDRive-specific Class of Output
Messages
The MID is partitioned into messages identified by Sub
IDs
31 49
Test Mode 4 for SiRFLoc v2.x only Additional test data (Test Mode 4)
32 50
SBAS Parameters SBAS operating parameters
34 52
1 PPS Time Message Time message for 1 PPS
37 55
Test Mode 4 Track Data
38 56
Extended Ephemeris Data Extended Ephemeris Mask and Integrity Information
E1 225
SiRF internal message Reserved
FF 255
Development Data Various status messages
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
16
6.2 OSP Input Messages
OSP input commands for the W2SG0084i are listed in
Table 5. Please note that the support of individual commands is dependent upon the firmware
loaded in the module.
Table 5: OSP Input Messages
Hex Decimal Name Description
35 53 Advanced Power Management
Power management scheme for SiRFLoc and SiRFXTrac
80 128 Initialize Data Source
Receiver initialization and associated parameters
81 129 Switch to NMEA Protocol
Enable NMEA messages, output rate and baud rate
82 130 Set Almanac (upload)
Sends an existing almanac file to the receiver
83 131 Handle Formatted Dump Data
Outputs formatted data
84 132 Poll Software Version
Polls for the loaded software version
85 133 DGPS Source Control
DGPS correction source and beacon receiver information
86 134 Set Binary Serial Port
Baud rate, data bits, stop bits, and parity
88 136 Mode Control
Navigation mode configuration
89 137 DOP Mask Control
DOP mask selection and parameters
8A 138 DGPS Mode
DGPS mode selection and timeout value
8B 139 Elevation Mask
Elevation tracking and navigation masks
8C 140 Power Mask
Power tracking and navigation masks
8F 143 Static Navigation
Configuration for static operation
90 144 Poll Clock Status
Polls the clock status
91 145 Set DGPS Serial Port
DGPS port baud rate, data bits, stop bits, and parity
92 146 Poll Almanac
Polls for almanac data
93 147 Poll Ephemeris
Polls for ephemeris data
94 148 Flash Update
On the fly software update
95 149 Set Ephemeris (upload)
Sends an existing ephemeris to the receiver
96 150 Switch Operating Mode
Test mode selection, SV ID, and period.
97 151 Set TricklePower Parameters
Push to fix mode, duty cycle, and on time
98 152 Poll Navigation Parameters
Polls for the current navigation parameters
A5 165 Set UART Configuration
Protocol selection, baud rate, data bits, stop bits, and parity
A6 166 Set Message Rate
SiRF Binary message output rate
A7 167 Set Low Power Acquisition Parameters
Low power configuration parameters
A8 168 Poll Command Parameters
Poll for parameters:
0x80: Receiver initialized & associated params
0x85: DGPS source and beacon receiver info
0x88: Navigation mode configuration
0x89: DOP mask selection and parameters
0x8A: DGPS mode selection and timeout values
0x8B: Elevation tracking and navigation masks
0x8C: Power tracking and navigation masks
0x8F: Static navigation configuration
0x97: Low power parameters
AA 170 Set SBAS Parameters
SBAS configuration parameters
AC 172
SiRFDRive-specific Class of Input
Messages
The MID is partitioned into messages identified by Sub IDs.
B4-C7 180-199
MID_UserInputBegin - MID_UserInputEnd
SDK user input messages only.
B4 180 Marketing Software Configuration
Selection of the Marketing Software Configurations as defined
in bits [3:2] of the GSC2xr chip configuration register
B6 182 Set UART Configuration
Obsolete.
E4 228 SiRF internal message
Reserved
E8 232 Extended Ephemeris Proprietary
Extended Ephemeris and Debug Flag
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
17
7 Electrical/RF Characteristics: Operating
The Table 6 below presents the normal limits of operation for the W2SG0084i. Operation of the
W2SG0084i beyond the limits of this table is not recommended and may result in permanent damage
of the device. Unless otherwise specified, operating conditions are over TA = -40 C° to +85 C°.
Typical is defined as TA = +25 C°.
Table 6: Operating Electrical Characteristics
Parameter1
Symbol
Min
Typ.
Max.
Units
Power Supply (3V3_IN)
Power Supply Voltage
VCC
3.25
3.3
3.6
V
I/O Supply Voltage
VIO
1.62
1.8
1.98
V
Power Supply Ripple
VRIP
100
mV
Peak Supply Current2
ICCP
50
mA
Power Supply Input Current3
ICC
35
mA
I/O Input Current
IIO
1.5
2.0
mA
Hibernate Current
Ih
20
uA
UART Interface (GPS_TX, GPS_RX)
Input Pin Voltage
VRX
1.8
3.6
V
Output Pin Voltage
VTX
1.8
V
GPIO Interface
GPIO Pin Voltage
VGP IO
1.62
1.8
1.98
V
GPS Enable (GPS_ON/OFF)
Input Pin Low Voltage
VIL
0
0.45
V
Input Pin High Voltage
VIH
1.35
1.8
3.6
V
RF Input
Input Impedance
RANT
50
Ω
Operating Frequency
FOP R
1.575
GHz
Antenna Bias Voltage
VANT
3.3
V
Antenna Bias Voltage Drop
VANTD
200
mV
RF Antenna Voltage
VCCRF
3.0
3.3
5.4
V
RF Antenna Output Current
ICCRF
22
mA
RF Characteristics
Power In @1.5745 GHz
PIN
-157
-131
10
dBm
Noise Figure
NF
2.5
dB
Input Return Loss
RLIN
-10.0
dB
Input VWR
VWRIN
TBD
1.8:1
Reverse Isolation
ISL
TBD
dB
Stability (100 -10000 MHz)
Receiver Sensitivity:
•Signal Acquisition @ 31dBHz
PAQC
-148
dBm
•Signal Tracking
PTKS
-163
-
dBm
Notes:
1 All parameters are at TA = 25C°, unless otherwise specified.
2 Defined as peak current drawn during initial acquisition operation of GPS Receiver.
3 Defined as current drawn during continuous operation at a 10Hz update rate.
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
18
7.1 Performance
7.1.1 Acquisition Time:
The average Time to First Fix (TTFF) for the W2SG0084i when integrated with the W2SG0084i-DEV
Development System is presented in Table 7 below:
Table 7: Average Time to First Fix
Parameter1
Symbol
Min
Typ.
Max.
Units
Hot Start – Typ. @ -140 dBm
TTFFTYP
-
0.7
-
s
Hot Start – Low @ - 146 dBm
TTFFLOW
-
1.0
-
s
Hot Start – Weak @ - 150 dBm
TTFFWEAK
-
2.0
-
s
Cold Start @ -140 dBm
TTFFCLD
-
35
-
s
Cold Start @ -140 dBm
TTFFCLD
-
37
-
s
Cold Start @ -146 dBm
TTFFCLD
-
38
-
s
Cold Start @ -150 dBm
TTFFCLD
-
45
-
s
Notes:
1 Stationary receiver, unless otherwise specified.
2 All parameters are at TA = 25C°, unless otherwise specified.
7.1.2 Position Accuracy (3-D NAV):
Table 8 below presents the Positional Accuracy for the W2SG0084i when integrated with the
W2SG0084i-DEV Development System.
Table 8: Positional Accuracy
Parameter1
Typ.
Units
Horizontal Position Accuracy: CEP (50%)3
3
m
Horizontal Position Accuracy: 2dRMS (95%)3
5
m
Vertical Position Accuracy: CEP (50%)3
3
m
Vertical Position Accuracy: 2dRMS (95%)3
5
m
Horizontal Velocity Accuracy: Deviation3
0.8
m/s
Vertical Velocity Accuracy: Deviation3
0.4
m/s
Notes:
1 Stationary receiver in the Open Sky at -130dBm, unless otherwise specified.
2 All parameters are at TA = 25C°, unless otherwise specified.
3 WAAS SBAS must be enabled
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
19
7.2 Environmental Characteristics
Table 9 establishes the environmental limits for operational use of the W2SG0084i.
Table 9: Environmental Characteristics
Parameter
Symbol
Min
Typ.
Max.
Units
Storage Temperature
TSTR
-40
-
+150
C°
Operating Temperature
TOPR
-40
+25
+85
C°
Humidity
5
-
95
%/Non-condensing
Altitude
-
-
60,000/18,288
ft/m
Acceleration
-
-
6.0
g
Velocity
TBD
7.3 Antenna
The W2SG0084i is designed for connection to either a passive or active antenna. The GPS module
includes an internal LNA and is designed to work with the passive antenna, but provides the bias
voltage supply for an active antenna to improve the receive sensitivity. If the design is to work with an
Active Antenna; Pin 20 (3V3_ANT) is tied to 3.3VDC.
8 Development Support
The W2SG0084i device is embedded with GPS software. This software is optimized to work
in very weak signal environments to improve navigation availability and accuracy.
To enable GPS performance testing, Wi2Wi provides a W2SG0084i GPS Evaluation board,
along with the SiRFLive 2.2 software tools.
The SiRFLive 2.2 is a PC tool that provides real-time monitoring of an attached GPS
receiver’s operation such as satellites being tracked, observed signal strength, and current
position.
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
20
9 Mechanical Information
9.1 Mechanical Specification:
The module is a Surface Mount Device (SMD). Table 10 presents the mechanical characteristics of
the W2SG0084i.
Table 10: Mechanical Characteristics
Parameter
Spec.
Tol.
Units
Size
11.2 x 12 x 2.3
±0.1
mm
Pad Pitch
1.5
±0.05
mm
9.2 Outline Drawing:
The overall dimensions of the W2SG0084i are 11.2mm x 12mm x 2.3mm. The module includes a
shield. The Mechanical Dimensions of the module are presented in Figure 6.
Figure 6: Package Outline Drawing
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
21
9.3 Recommended Reflow Profile:
Assembly Guidelines:
1. Follow solder paste manufacturers recommended profile
a. All RoHS solder pastes contain the same basic chemistry; however, each
manufacturer may have a recommended reflow profile that performs best for
their product.
2. The profile illustrated in JESD-020 and below is for reference only.
a. There is no one profile fits all scenario.
3. Profiles must be dialed in to the specific assembly type.
4. ENIG finishes are more susceptible to voids and air entrapment.
a. Selecting a RoHS solder paste that is “ENIG” compatible is recommended.
5. Recommended finishes for LGA/BGA inclusive assemblies include HASL, OSP, Tin,
& Silver.
Figure 7: Recommended Reflow Profile
Key features of the profile in Figure 7:
Initial Ramp = 1 -2.50C/Sec to 1750C +/- 250C equilibrium
Equilibrium = 60 180 seconds
Ramp to Maximum (Peak) temperature (2450C) = 30C/sec max.
Time above liquidus temperature (2170C): 45-90 seconds
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
22
10 Part Order Options
Part Order Options
Description
Packing Method
W2SG0084i-T
9600 baud rate*
in Trays
W2SG0084i-TR
9600 baud rate*
On Tape and Reel
W2SG0084i-1-T
4800 baud rate*
in Trays
W2SG0084i-1-TR
4800 baud rate*
On Tape and Reel
W2SG0084i-2-T
Auto Start, 9600 baud rate*
in Trays
W2SG0084i-2-TR
Auto Start, 9600 baud rate*
On Tape and Reel
W2SG0084i-3-T
Reserved for Future Use
in Trays
W2SG0084i-3-TR
Reserved for Future Use
On Tape and Reel
* All these options contain static navigation and SBAS, on.
11 Disclaimers
Wi2Wi, Inc. PRODUCTS ARE NOT AUTHORISED FOR USE AS CRITICAL
COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS
WRITTEN APPROVAL OF THE MANAGING DIRECTOR OF Wi2Wi, Inc.
The definitions used herein are:
a) Life support devices or systems are devices which (1) are intended for surgical implant into
the body, or (2) support or sustain life and whose failure to perform when properly used in
accordance with the instructions for use provided in the labeling can reasonably be expected
to result in a significant injury to the user. b) A critical component is any component of a life
support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or system, or to affect its safety or effectiveness.
Wi2Wi does not assume responsibility for use of any of the circuitry described, no circuit
patent licenses are implied and Wi2Wi reserves the right at any time to change without notice
said circuitry and specifications.
11.1 Data Sheet Status
Wi2Wi, Inc. reserves the right to change the specification without prior notice in order to
improve the design and supply the best possible product. Updated information, firmware and
release notes will be made available on www.wi2wi.com. Please check with Wi2Wi Inc. for
the most recent data before initiating or completing a design.
12 Certifications
The W2SG0084i shall conform to the following standards when integrated to the W2SG0084i-DEV
development system.
EMC/Immunity
United States: FCC Part 15(To be tested)
Canada: ICES 033 (To be Tested)
European Union: EN 55022, IEC 1004/CISPR 22 (To be Tested)
Wi2Wi, Inc. Doc No. ALT-PDT-DOC Rev.1.61
Datasheet, GPS Module– W2SG0084i
Dated: November 11, 2011
Copyright © 2011 Wi2Wi, Inc.
23
Japan: VCCI - V series (To be Tested)
Taiwan: CNS 13438 (To be Tested)
Korea: RRL No. 2005-82 (MIC) (To be Tested)
Australia New Zealand – CISPR (To be Tested)
Product Safety
United States/Canada: UL/CSA 60950, UL 61010, UL 60065, CSA 601,CSA 61010,C22.2 No.
225(To be Tested)
European Union: EN 60950, EN61010, IEC 60065, IEC 60601 (To be Tested)
Japan: ARIB STD-T66 (To be Tested)
Restriction of Hazardous Substances Directive (RoHS) 2002/95/EC (To be Tested)
13 References
13.1 Specifications
System Specification, SirfStarIV GDS4e BGA, issue 3
NMEA 0183 Version 3.01, January 2002, Addendum NMEA 0183-HS Version 1.0
OSP Issue 8
FAA WAAS Specification FAA-E 2892b
13.2 Trademarks, Patents and Licenses
Trademarks: SiRF, SiRF logo, SiRFstar, SiRF Powered, SnapLock, Foliage Lock,
TricklePower, SingleSat, SiRFLoc, SiRFDRive, SnapStart, Push-to-Fix, SiRFNav,
SiRFWare and WinSiRF are trademarks of CSR Inc. (SiRF Technology)
13.3 Other
W2SG0084i-DEV Development Kit, GPS Module
