Maestro A1084 Manual de usuario
GPS Receivers A1084
A Description of Maestro’s
GPS Receiver Modules A1084-A/-B
User’s Manual
Version 1.4
V1.4 – Mar-11 User’s Manual Page 2 of 39
Revision History
Rev. Date Description
1.0 01-26-09 First release
1.1 06-30-09 Clear differentiation between A and B; extended note on definition of
tracking sensitivity; corrected soldering profile; extended temperature
range specification with slightly decreased performance below -30°C;
added information on voltage feed for active antenna on passive
antenna input (ANT_INT); added hint on “Ephemeris Push”; cor-
rected reel and box quantities
1.2 12-11-09 New label description (introduced cw50/09); extended minimum
configuration; application note on Hibernate Mode extended (use of
ON_OFF pin or Shutdown Command)
1.3 12-22-09 Corrected Vcc connection in minimum configuration (wrong pin in
1.2)
1.4 02-09-11 New style; moved to Maestro
mm-dd-yy
V1.4 – Mar-11 User’s Manual Page 3 of 39
Disclaimer
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF MAESTRO
WIRELESS SOLUTIONS LIMITED. IT MAY NOT BE COPIED OR TRANSMITTED
BY ANY MEANS, PASSED TO OTHERS, OR STORED IN ANY RETRIEVAL
SYSTEM OR MEDIA, WITHOUT PRIOR CONSENT OF MAESTRO OR ITS
AUTHORIZED AGENTS.
THE INFORMATION IN THIS DOCUMENT IS, TO THE BEST OF OUR
KNOWLEDGE, ENTIRELY CORRECT. HOWEVER, MAESTRO CAN NEITHER
ACCEPT LIABILITY FOR ANY INACCURACIES, OR THE CONSEQUENCES
THEREOF, NOR FOR ANY LIABILITY ARISING FROM THE USE OR
APPLICATION OF ANY CIRCUIT, PRODUCT, OR EXAMPLE SHOWN IN THE
DOCUMENT.
THE PRODUCT (HARD- AND SOFTWARE) DESCRIBED IN THIS
DOCUMENTATION IS NOT AUTHORIZED FOR USE IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF MAESTRO.
THIS DOCUMENT MAY PROVIDE LINKS TO OTHER WORLD WIDE WEB SITES
OR RESOURCES. BECAUSE MAESTRO HAS NO CONTROL OVER SUCH SITES
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RELIANCE ON ANY SUCH CONTENT, GOODS OR SERVICES AVAILABLE ON
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MAESTRO RESERVES THE RIGHT TO CHANGE, MODIFY, OR IMPROVE THIS
DOCUMENT OR THE PRODUCT DESCRIBED HEREIN, AS SEEN FIT BY
MAESTRO WITHOUT FURTHER NOTICE.
V1.4 – Mar-11 User’s Manual Page 4 of 39
Table of Contents
1 Introduction........................................................................................................6
1.1 Label .................................................................................................................7
1.2 Characteristics ..................................................................................................8
1.2.1 GPS Characteristics ................................................................................................... 8
1.2.2 Mechanical Characteristics......................................................................................... 8
1.3 Handling Precautions ........................................................................................ 8
2 Ordering Information.........................................................................................9
2.1 GPS Receivers A1084 ...................................................................................... 9
2.2 Packing of the A1084 ........................................................................................ 9
2.3 Additional Equipment ...................................................................................... 11
3 Quick Start........................................................................................................12
3.1 Minimum Configuration ................................................................................... 12
3.2 Antennas......................................................................................................... 15
3.2.1 Passive Antennas..................................................................................................... 15
3.2.2 Active Antennas........................................................................................................ 15
3.3 Serial Port Settings ......................................................................................... 15
3.4 Improved TTFF ............................................................................................... 15
4 Mechanical Outline ..........................................................................................16
4.1 Details Component Side A1084 ...................................................................... 16
4.2 Details Solder Side A1084 .............................................................................. 17
5 Pin-out Information..........................................................................................18
5.1 Layout A1084 .................................................................................................. 18
5.2 Description A1084 Signals .............................................................................. 19
5.2.1 Description A1084-A Signals.................................................................................... 19
5.2.2 Description A1084-B Signals.................................................................................... 20
5.3 General Comments ......................................................................................... 21
6 Electrical Characteristics................................................................................22
6.1 Operating Conditions ...................................................................................... 22
6.2 Absolute Maximum Ratings ............................................................................ 22
6.3 DC Electrical Characteristics........................................................................... 23
7 Mounting...........................................................................................................24
7.1 Proposed Footprint for Soldering .................................................................... 24
7.2 Recommended Profile for Reflow Soldering ................................................... 24
8 Use of GPS Antennas......................................................................................25
8.1 Connecting a GPS antenna to the GPS receiver ............................................ 25
8.2 Antenna Connections...................................................................................... 27
8.2.1 Active Antennas........................................................................................................ 27
8.2.2 Passive Antennas..................................................................................................... 29
8.2.3 Active Antennas on ANT_INT................................................................................... 29
8.2.4 Hints ......................................................................................................................... 29
V1.4 – Mar-11 User’s Manual Page 5 of 39
9 Quality and Reliability......................................................................................30
9.1 Environmental Conditions ............................................................................... 30
9.2 Product Qualification ....................................................................................... 30
9.3 Production Test............................................................................................... 30
10 Applications and Hints ..................................................................................31
10.1 Minimum Configuration ................................................................................. 31
10.2 Antenna Status Adaptation ........................................................................... 31
10.2.1 Antenna Sensor...................................................................................................... 31
10.2.2 Antenna Sensor with Current Limiter...................................................................... 32
10.3 VANT Pin (antenna voltage input pin) ........................................................... 33
10.4 1PPS Pin (1 pulse per second pin) ............................................................... 33
10.5 Reset Signal.................................................................................................. 34
10.5.1 Internal Reset Circuit .............................................................................................. 34
10.5.2 External Reset Circuit............................................................................................. 34
10.6 Battery Back-up............................................................................................. 35
10.7 Push-to-Fix Mode.......................................................................................... 36
10.8 Hibernate Mode............................................................................................. 36
10.8.1 Entering Hibernate Mode with ON_OFF Pin .......................................................... 36
10.8.2 Entering Hibernate Mode with Shutdown Command.............................................. 36
11 Evaluation Kit EVA1084-A.............................................................................37
12 Related Information .......................................................................................38
12.1 Contact.......................................................................................................... 38
12.2 Related Documents....................................................................................... 38
12.3 Related Tools ................................................................................................ 38
13 List of Figures ................................................................................................39
14 List of Tables..................................................................................................39
V1.4 – Mar-11 User’s Manual Page 6 of 39
1 Introduction
Maestro’s GPS modules A1084-A and A1084-B are highly integrated GPS receiver
modules that can be used as SMT components. They are capable of receiving sig-
nals from up to 20 GPS satellites and transferring them into position and timing in-
formation that can be read over a serial port. This new generation of GPS modules
combines small size and high-end GPS functionality at low power consumption:
•Operable at 3.3V / 26mA (typ.) @ 1fix per second
•UART interface at CMOS level
•Small form factor of 15.24 x 15.24 mm² (0.6” x 0.6”)
•Supported temperature range: -40°C to +85°C
•Single-sided SMT component, for reflow soldering
•RoHS compliant, lead-free
•Tape & reel packaging
•Excellent antenna support:
Feature A1084-A A1084-B
Direct support of
passive antennas
via integrated LNA
YES
(on ANT_INT)
YES
(on ANT_INT)
Direct support of
active antennas via
on-module antenna
supply voltage feed
YES
(on ANT_EXT)
NO
(possible via external
circuit - see application
note)
Integrated RF
switch for to select
between connected
GPS antennas
YES NO
Table 1: A1084 antenna support
The A1084 receivers are available as off-the-shelf components, 100% tested and
shipped in standard tape-and-reel package.
V1.4 – Mar-11 User’s Manual Page 7 of 39
1.1 Label
The A1084-A label (size: 9.5 x 9.5 mm²) contains the following information:
Figure 1: A1084-A label
The label is placed on the shield of the module. The data matrix code holds the
product type, software version, software release, hardware release, factory code,
year & week of assembly and a 6-digit serial number. The A1084-B’s labels show a
“B” instead of the “A”.
V1.4 – Mar-11 User’s Manual Page 8 of 39
1.2 Characteristics
The modules are characterized by the following parameters.
1.2.1 GPS Characteristics
Channels 20, parallel tracking
Correlators 200,000 plus
Frequency L1 (= 1,575 MHz)
Tracking Sensitivity (1) -159 dBm
Position Accuracy Stand alone < 10 m CEP (SA off)
Horizontal Position Accuracy Stand alone < 2.5 m CEP (SA off)
Obscuration recovery (2) 0.1 s
Hot start (3) < 1 s
Warm (4) < 32 s
Time To First Fix – TTFF
(theoretical minimum values;
values in real world may differ)
Cold (5) < 35 s
Table 2: A1084 GPS characteristics
(1) Typical with external active antenna – see also paragraph “3.2 Antennas”
(2) The calibrated clock of the receiver has not stopped, thus it knows precise time (to the µs level).
(3) The receiver has estimates of time/date/position and valid almanac and ephemeris data.
(4) The receiver has estimates of time/date/position and recent almanac.
(5) The receiver has no estimate of time/date/position, and no recent almanac.
Note: Performance (sensitivity and TTFF) might slightly decrease below -30°C.
1.2.2 Mechanical Characteristics
A1084 Mechanical
dimensions
Length
Width
Height
15.24 mm, 0.6”
15.24 mm, 0.6”
2.4 mm, 0.095”
A1084 Weight 1.2 g, 0.042 oz
Table 3: A1084 dimensions and weight
1.3 Handling Precautions
The GPS receiver modules A1084-A/-B are sensitive to electrostatic discharge
(ESD). Please handle with appropriate care.
V1.4 – Mar-11 User’s Manual Page 9 of 39
2 Ordering Information
2.1 GPS Receivers A1084
The order number is built as follows:
•A1084-Axxx
•A1084-Bxxx
A1084-A for the A1084-A module, A1084-B for the A1084-B module. The “xxx” refers
to the current firmware version on the module. If no firmware version is referenced in
an order, the latest version will be provided.
2.2 Packing of the A1084
The A1084-A/-B GPS modules come in a tape and reel package suitable for pick and
place machines.
Figure 2: A1084 tape specifications (1)
V1.4 – Mar-11 User’s Manual Page 10 of 39
Figure 3: A1084 tape specifications (2)
Figure 4: A1084 tape specifications (3)
One complete reel holds 900 A1084 modules.
One box holds three reels, so a total of 2700 A1084 modules.
Este manual sirve para los siguientes modelos
2
Tabla de contenidos
Otros manuales de GPS de Maestro
Maestro
Maestro EVA1084 Manual de usuario
Maestro
Maestro A2035-H Manual de usuario
Maestro
Maestro A2100-A/B Manual de usuario
Maestro
Maestro A2100-A Manual de usuario
Maestro
Maestro EVA2135-H Manual de usuario
Maestro
Maestro MICROTRACKER MT-01 Instrucciones de instalación
Maestro
Maestro A2200-A Manual de usuario
Maestro
Maestro A5135-H Manual de usuario
