GOTOP GT-1613-MTR Ultra High Sensitivity and Low Power GPS

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GOTOP GT-1613-MTR
Ultra High Sensitivity and Low Power
GPS Receiver Module
General Description
The Gotop GT-1613-MTR is a complete GPS engine module that features super
sensitivity, ultra low power and small form factor. The GPS signal is applied to the
antenna
input of module, and a complete serial data message with position, velocity
and time information is presented at the serial interface with NMEA protocol or custom
protocol.
Its –165dBm tracking sensitivity extends positioning coverage into place like urban
canyons and dense foliage environment where the GPS was not possible before. The
small form factor and low power consumption make the module easy to integrate into
portable device like PNDs, mobile phones, cameras and vehicle navigation systems.
Applications
LBS (Location Based Service)
PND (Portable Navigation Device)
Vehicle navigation system
Mobile phone
Figure 1: GT-1613 -MTR Top View
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GOTOP GT-1613-MTR
Datasheets
Features
Build on high performance, low-power MTK3337chipset
Ultra high sensitivity: -165dBm
Extremely fast TTFF at low signal level
Built in high gain LNA
Low power consumption: Max 20mA@3.3V
NMEA-0183 compliant protocol or custom protocol
Operating voltage: 2.8V to 4.3V
Operating temperature range: -40 to 85℃
SMD type with stamp holes
Small form factor: 15.9x13.1x2.6mm
RoHS compliant (Lead-free)
Pin Assignment
Figure 2: GT-1613-MTR Pin Package
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Datasheets
Performance Specification
Parameter
Specification
Receiver Type
L1 frequency band, 22tracking/66acquisition-channel
Sensitivity
Tracking
-165dBm
Acquisition
-163dBm(hot)
-148dBm(cold)
Accuracy
Acquisition Time
Power Consumption
Position
5m CEP without SA
Velocity
0.1m/s without SA
Timing (PPS)
10ns RMS
Cold Start
38s
Warm Start
35s
Hot Start
1s
Re-Acquisition
<1s
Tracking
20mA @3.3V Vcc
Acquisition
18mA
Sleep/Standby
TBD
NavigationDataUpdate Rate 1Hz
Operational Limits
Altitude
Max 18,000m
Velocity
Max 515m/s
Acceleration
Less than 4g
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Datasheets
Interfaces Configuration
Power Supply: Regulated power for the GT-1613-MTR is required. The input voltage
Vcc should be 3.3V ±10%, maximum, current is no less than 20mA. Suitable decoupling
must be provided by external decoupling circuitry.
Antenna: The GT-1613-MTR GPS receiver is designed for supporting the active
antenna or passive antenna connected with pin RF_IN. The gain of active antenna
should be no less than 15dB. The maximum noise figure should be no more than 2.5dB
and output impedance is at 50 Ohm.
UART Ports: The module supports two full duplex serial channels UART_A and
UART_B. All serial connections are at 3V CMOS logic levels, if need different voltage
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Datasheets
levels, use appropriate level shifters. The baud rate of both serial ports are fully
programmable, the data format is however fixed: X, N, 8, 1, i.e. X baud rate, no parity,
eight data bits and one stop bit, no other data formats are supported, LSB is sent first.
The modules default baud rate is set up 9600bps, however, the user can change the
default baud rate to any value from 4800 bps to 115kbps. UART_A is used e.g. for
booting and NMEA interface. UART_B can be utilized for UBP protocol.
Backup Battery Power: In case of a power failure on pin Vcc, real-time clock and
backup RAM are supplied through pin VBAT. This enables the GT-1613-MTR GPS
Receiver to recover from power failure with either a hot start or a warm start (depending
on the duration of Vcc outage). If no Backup Battery is connected, the receiver performs
a cold start upon powered up.
Pin Description
Pin No.
Pin name
I/O
Description
1
RF_IN
I
GPS Signal Input
2
GND
G
Ground
3
GND
G
Ground
4
GND
G
Ground
5
VBAT
I
RTC Battery Input
6
GND
G
Ground
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Remark
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GOTOP GT-1613-MTR
Datasheets
7
NC
No connection
8
GND
G
Ground
9
GND
G
Ground
10
GND
G
Ground
11
Vcc
I
Module Power Supply
12
GND
G
Ground
13
RST
I
Module Reset (Active Low)
14
GND
G
Ground
15
GND
G
Ground
16
GPIO2
17
GND
18
GPIO1
19
GND
G
Ground
20
PPS
O
Time Pulse(1PPS)
21
GND
G
Ground
22
GND
G
Ground
23
GND
G
Ground
24
GND
G
Ground
25
NC
26
GND
Leave Open if not used
Leave Open in not used
I/O General purpose I/O
G
Ground
I/O General purpose I/O
Leave Open in not used
No connection
G
Ground
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Datasheets
27
NC
No connection
28
GND
G
Ground
29
GND
G
Ground
30
TXA
O
UART Serial Data Output ,Pull up (75KΩ) if not used
31
RXA
I
UART Serial Data Input ,Pull up (75KΩ) if not used
32
RXB
33
GND
34
TXB
35
GND
G
Ground
36
GND
G
Ground
UART Serial Data Input 1
G
Pull up if not used
Ground
UART Serial Data Output 1
Leave Open in not used
Electrical Characteristics
Absolute Maximum Rating
Parameter
Symbol
Min
Max
Units
Vcc
2.8
4.3
V
Input Pin Voltage I/O
RST
-0.3
3.6
V
Input Pin Voltage I/O
RXA, RXB
-0.3
3.6
V
VBAT
2.0
3.6
V
Power Supply
Power Supply Volt.
Input Pins
Backup Battery
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Datasheets
Environment
Storage Temperature
Tstg
PeakReflow Soldering Temperature
-40
Tpeak
Humidity
125
°C
260
°C
95
%
Note: Absolute maximum ratings are stress ratings only, and functional operation at the
maxims is not guaranteed. Stress beyond the limits specified in this table may affect
device reliability or cause permanent damage to the device. For functional operating
conditions, refer to the operating conditions tables as follow.
Operating Conditions
Parameter
Power supply voltage
Powersupplyvoltageripple
Symbol Condition
Vcc
Min
Typ
Max
Units
2.8
3.3
4.3
V
30
mV
18
mA
Vcc_PP Vcc=3.0V
Consumption current
Icc
Vcc=3.0V
Input high voltage
VIH
0.7xVcc
Vcc+1.0
V
Input low voltage
VIL
-0.3
0.3xVcc
V
Output high voltage
VOH
0.8xVcc
Vcc
V
Output low voltage
VOL
0
0.2xVcc
V
Operating temperature
Topr
-40
85
°C
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GOTOP GT-1613-MTR
Datasheets
Mechanical Specification
TOP VIEW
Figure 3: GT-1613-MTR Dimensions
Software Protocol
NMEA 0183 Protocol
The NMEA protocol is an ASCII-based protocol, Records start with a $ and with
carriage return/line feed. GPS specific messages all start with $GPxxx where xxx is a
three-letter identifier of the message data that follows. NMEA messages have a
checksum, which allows detection of corrupted data transfers.
The Gotop GT-1613-MTR supports the following NMEA-0183 messages: GGA, GLL,
GSA, GSV, RMC and VTG
Table 1: NMEA-0183 Output Messages
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Datasheets
NMEA Record
DESCRIPTION
GGA
Global positioning system fixed data
GLL
Geographic position—latitude/longitude
GSA
GNSS DOP and active satellites
GSV
GNSS satellites in view
RMC
Recommended minimum specific GNSS data
VTG
Course over ground and ground speed
GGA-Global Positioning System Fixed Data
Table 2 contains the values of the following example:
$GPGGA, 161229.487,3723.2475,N, 12158.3416,W, 1,07,1.0,9.0,M.0000*18
Table 2: GGA Data Format
Name
Example
Units
Description
Message ID
$GPGGA
GGA protocol header
UTC Position
161229.487
hhmmss.sss
Latitude
3723.2457
ddmm.mmmm
N/S indicator
N
N=north or S=south
Longitude
12158.3416
dddmm.mmmm
E/W Indicator
W
E=east or W=west
1
See Table 2-1
PositionFixIndicator
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Datasheets
Satellites Used
07
Range 0 to 12
HDOP
1.0
Horizontal Dilution of Precision
MSL Altitude
9.0
meters
Units
M
meters
Geoids Separation
Units
meters
M
meters
Age of Diff.Corr.
second
Diff.Ref.Station ID
0000
Checksum
*18
Null fields when DGPS is not Used
<CR> <LF>
End of message termination
Table 2-1: Position Fix Indicators
Value
Description
0
Fix not available or invalid
1
GPS SPS Mode, fix valid
2
Differential GPS, SPS Mode, fix valid
3
GPS PPS Mode, fix valid
GLL-Geographic Position – Latitude/Longitude
Table 3 contains the values of the following example:
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Datasheets
$GPGLL , 3723.2475, N,12158.3416, W,161229.487, A*2C.
Table 3: GLL Data Format
Name
Example
Units
Description
Message ID
$GPGLL
GLL protocol header
Latitude
3723.2475
ddmm.mmmm
N/S Indicator
N
N=north or S=south
Longitude
12158.3416
dddmm.mmmm
E/W Indicator
W
E=east or W=west
UTC Position
161229.487
hhmmss.sss
Status
A
A=data valid or V=data not valid
Checksum
*2C
<CR> <LF>
End of message temination
GSA-GNSS DOP and Active Satellites
Table 4 contains the values of the following example:
$GPGSA , A, 3, 07, 02, 26,27, 09, 04,15, , , , , , 1.8,1.0,1.5*33.
Table 4: GSA Data Format
Name
Example
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Units
Description
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GOTOP GT-1613-MTR
Datasheets
Message
$GPGSA
GSA protocol header
Mode 1
A
See Table 4-2
Mode 2
3
See Table 4-1
Satellite Used
07
Sv on Channel 1
Satellite Used
02
Sv on Channel 2
…
…
…
Satellite Used
Sv on Channel 12
PDOP
1.8
Position Dilution of Precision
HDOP
1.0
Horizontal Dilution of Precision
VDOP
1.5
Vertical Dilution of Precision
Checksum
*33
<CR> <LF>
End of message termination
Table 4-1: Mode 1
Value
Description
1
Fix not available
2
2D
3
3D
Table 4-2: Mode 2
Value
Description
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Datasheets
M
Manual-forced to operate in 2D or 3D mode
A
Automatic-allowed to automatically switch 2D/3D
GSV-GNSS Satellites in View
Table 5 contains the values of the following example:
$GPGSV , 2, 1, 07, 07, 79,048, 42, 02, 51,062, 43, 26, 36,256, 42, 27, 27, 138,42*71
$GPGSV, 2, 2, 07, 09, 23,313, 42, 04, 19, 159, 41, 15,12,041, 42*41.
Table 5: GGA Data Format
Name
Example
Units
Description
Message ID
$GPGSV
GSV protocol header
Number ofMessage
2
Range 1 to 3
Message Number
1
Range 1 to 3
Satellites in View
07
Satellite ID
07
Elevation
79
degrees
Channel 1(Maximum 90)
Azinmuth
048
degrees
Channel 1(True, Range 0 to 359)
SNR(C/NO)
42
dBHz
Range 0 to 99,null when not tracking
Channel 1(Range 1 to 32)
…
…
Satellite ID
27
Elevation
27
Channel 4(Range 1 to 32)
degrees
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Channel 4(Maximum 90)
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GOTOP GT-1613-MTR
Datasheets
Azimuth
138
degrees
Channel 4(True, Range 0 to 359)
SNR(C/NO)
42
dBHz
Range 0 to 99, null when not tracking
Checksum
*71
<CR> <LF>
End of message termination
Depending on the number of satellites tracked multiple messages of GSV data may be
required.
RMC-Recommended Minimum Specific GNSS Data
Table 6 contains the values of the following example:
$GPRMC, 161229.487, A, 3723.2475, N, 12158.3416, W, 0.13,309.62, 120598,, *10
Table 6: RMC Data Format
Name
Example
Units
Description
Message ID
$GPRMC
RMC protocol header
UTS Position
161229.487
hhmmss.sss
Status
A
A=data valid or V=data not valid
Latitude
3723.2475
ddmm.mmmm
N/S Indicator
N
N=north or S=south
Longitude
12158.3416
dddmm.mmmm
E/W Indicator
W
E=east or W=west
Speed Over Ground
0.13
Knots
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Course Over
Datasheets
309.62
Degrees
True
Ground
Date
120598
Magnetic variation
Checksum
dummy
Degrees
E=east or W=west
*10
<CR> <LF>
End of message termination
VTG-Course Over Ground and Ground Speed
Table 7 contains the values of the following example:
$GPVTG, 309.62, T, M, 0.13, N, 0.2, K*6E
Table 7: VTG Data Format
Name
Example
Message ID
$GPVTG
Course
309.62
Reference
T
Units
Description
VTG protocol header
Degrees
Measured heading
True
Course
Degrees
Reference
M
Speed
0.13
Units
N
Speed
0.2
Measured heading
Magnetic
Knots
Measured horizontal speed
Knots
Km/hr
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Measured horizontal speed
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Datasheets
Units
K
Kilometer per hour
Checksum
*6E
<CR> <LF>
End of message termination
Manufacturing Process Recommendations
Note:The final soldering temperature chosen at the factory depends on additional
external factors like choice ofsoldering paste,size,thickness and properties of the
baseboard,etc. Exceeding the maximum soldering temperature in the recommended
soldering profile may permanently damage the module.
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Datasheets
©Copyright 2012 Gotop Technology Co., Ltd. All Right Reserved
The information contained herein is subject to change without notice.
Gotop Technology Co. ,LTD
Add:Room 603 Zhantao Technology Building,Minzhi Road,Xinniu Communnity,Minzhi
Street,Baoan District,ShenZhen City China.
Phone: 86-755-23804156
fax:
86-755-23804155
N 22° 32' 17", E 114° 07' 07“
http://www.gotop-zzu.com
Not to be reproduced in whole or part for any purpose without written permission of
Gotop Technology Inc (‘Gotop’). Information provided by Gotop is believed to be
accurate and reliable. These materials are provided by Gotop as a service to its
customers and may be used for informational purposes only. Gotop assumes no
responsibility for errors or omissions in these materials, nor for its use. Gotop reserves
the right to change specification at any time without notice.
These materials are provides ‘as is’ without warranty of any kind, either expressed or
implied, relating to sale and/or use of Gotop products including liability or warranties
relating to fitness for a particular purpose, consequential or incidental damages,
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Gotop products are not intended for use in medical, life-support devices, or applications
involving potential risk of death, personal injury, or severe property damage in case of
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