GPS Receivers A2100-A - MT
Contents
1. Figure 11 Strip line parameters A2100 A V0 3 Jan 10 User s Manual Page 24 of 35 PRELIMINARY Wa cotech In this case the width should be about 1 8 times the height of the PCB W 1 8 x H In the example one would get a width of W 1 8 x 0 8 mm 1 44 mm V0 3 Jan 10 User s Manual Page 25 of 35 PRELIMINARY WV ncotec h 8 2 Antenna Connections 8 2 1 Passive Antennas A passive antenna connected to ANT input pin 12 should be placed as close as possible to the GPS receiver The signal power lost by the antenna cable or lost by the strip line on the PCB can not be recovered by the LNA Low Noise Amplifier integrated in the GPS receiver A suitable Ground Plane design should be considered depending on the antenna type connected to ANT input pin 12 8 2 2 Active Antennas General GPS active antenna specification Limitations e Supply voltage voltage fed into VANT pin 5V max e Supply current 50mA max Recommendations e Gain 2 20dB should not exceed tbd dB cable loss e Noise figure lt 1 5dB The recommendations apply to the majority of active antennas that can be found in the market Anyhow the quality of the GPS antenna chosen is of paramount impor tance for the overall sensitivity of the GPS system The system design needs to reflect the supply voltage of the antenna If the supply voltage is equal to Vcc Vcc can be connected to VANT If the antenna requires a different supply voltage2. e Antenna antenna connected to antenna pin Use ground pin 13 close to the antenna input for RF ground V0 3 Jan 10 User s Manual Page 20 of 35 Uf PRELIMINARY WV ncotec h 6 Electrical Characteristics 6 1 Operating Conditions Pin Description Min Typical Max 3 Peak Acquisition Curent II ted Average Acquisition Current tbd Tracking Current tbd Table 5 A2100 A electrical characteristics 1 Peak acquisition current is characterized by millisecond bursts above average acquisition cur rent 2 Average current is typically only the first two seconds of TTFF 3 Tracking current typically includes tracking and the post acquisition portion of TTFF 4 During standby state RTC block and core powered on and clock off 6 2 Absolute Maximum Ratings Symbol Parameter Min Max Unit V lov Absolute sum of all input currents during overload condition 200 Table 6 PRELIMINRAY absolute maximum ratings otresses beyond those listed under Absolute Maximum Ratings may cause per manent damage to the device This is a stress rating only Functional operation of the device at these or any other conditions beyond those indicated in the opera tional sections of this specification is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability V0 3 Jan 10 User s Manual Page 21 of 35 PRELIMINARY v ncotec h 6 3 DC E
3. but wakes up periodically to refresh position time ephemeris data and RTC calibration The push to fix mode is initialized and entered using the SiRF Binary Protocol Please refer to the appropriate manual paying particular attention to the paragraph titled Set TricklePower Parameters In order to request a fix outside the specified duty cycles it is necessary to toggle the pin ON OFF Toggling is done by pulling the signal to HIGH for about 100ms For more information see AppNote Firmware GSC3 which applies also to GSD4e 10 3 Hibernate Mode In order to enter Hibernate Mode it is necessary to send a shutdown command Firmware version 4 0 0 supports use of the command PSRF117 16 0B in NMEA mode as described in the manual GPS Firmware GSD4e 4 0 0 In SIRF Binary mode the according command can be found in the SiRF Binary Reference Manual Software Commanded Off Message ID 205 After a short delay the module will switch into hibernate mode The RTC will keep on running and SRAM is backed with the typical current of 20 uA drawn from Vcc To wake the module up again toggling the ON OFF pin or resetting the module via nRST is necessary V0 3 Jan 10 User s Manual Page 28 of 35 PRELIMINARY WA cotech 10 4 Antenna Status Adaptation This chapter shall give assistance in designing a circuit for detecting if an active antenna is connected to the module The information about the antenna status can be derived fr
4. 163dBm o 48 track verification channels o SBAS WAAS EGNOS MSAS GAGAN e Breakthrough micro power technology o Requires only 50 500pA to maintain hot start capability e Active jammer remover o Removes in band jammers up to 80dB Hz o Tracks up to eight CW continuous wave jammers 1 2 Characteristics Overview The module s most important characteristics are Operable at 3 3V 32mA typ 1 fix per second UART interface at 3 3V CMOS level Prepared for SPI Slave support at 3 3V CMOS Direct passive antenna support owitched antenna voltage for active antenna support omall form factor of 15 24 mm x 15 24 mm 0 6 x 0 6 Supported temperature range 40 C to 85 C Single sided SMT component for reflow soldering Tape amp reel packaging The A2100 A receiver module is available as off the shelf components 100 tested and shipped in standard tape and reel package V0 3 Jan 10 User s Manual Page 6 of 35 PRELIMINARY WA cotech 1 3 RoHS and Lead Free Information Vincotech s products marked with the lead free symbol either on the module or the packaging comply with the Directive 2002 95 EC of the European Parlia ment and the Council on the Restriction of Use of certain Hazardous Sub stances in Electrical and Electronic Equipment RoHS All Vincotech GPS receiver modules smart GPS antenna modules and telematics units are RoHS compliant V0 3 Jan 10 User s Manual Page of 35 PRELIMINARY WV ncotec h 1
5. 4 Label The A2100 A labels hold the following information Hardware rr hardware revision Vincotech Vincotech ug Software sss software version tt software release Location and date code yy production year General description Example Green if OK Figure 1 A2100 A label The label is placed on the shield of the module V0 3 Jan 10 User s Manual Page 8 of 35 Uf PRELIMINARY WV ncotec h 1 5 Characteristics The modules are characterized by the following parameters 1 5 1 GPS Characteristics Channels MeB paralletracking Correlators 400 000 Frequency 1 jLf 1575MH Tracking Sensitivity J f 163dBm Time To First Fix TTFF 0 15 theoretical minimum values values in real world may differ Table 1 A2100 A GPS characteristics 1 Typical with good antenna see also paragraph 3 2 Antennas 2 The calibrated clock of the receiver has not stopped thus it knows precise time to the us 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 5 2 Mechanical Characteristics A2100 A Mechanical Length 15 24 mm 0 6 dimensions Wid
6. Additional equipment A detailed description of the EVA2100 A Evaluation Kit can be found in the appro priate manual V0 3 Jan 10 User s Manual Page 12 of 35 PRELIMINARY WV ncotec h 3 Quick Start In order to allow an easy and quick start with the A2100 A module this chapter pro vides a short overview on the important steps to be taken to receive NMEA mes sages with position information on a serial port UART NOTE 1 The A2100 A needs an external pull up resistor to be configured for UART operation Although first firmware releases will work with the UART interface by default future releases will not Please consider the pull up resis tor in your design or pull the GPIO up right after reset by other means NOTE 2 The ON OFF input of the A2100 A needs to be connected to a push pull output of a microprocessor For a wake up including the initial one after power on a LOW HIGH transmission is mandatory 3 1 Minimum Configuration The following picture shows the minimum configuration for NMEA output and com mands sent and received via an RS232 interface based on the GPS module A2100 A using a passive antenna Shown from bop without lid pads shown for better understanding e ANT EXT AEN A2100 A OH OFF GSD4e Tx Ex n C D C L C C E P n E Figure 5 Minimum configuration A2100 A NOTE It is recommended to supply Vcc continuously Use SiRFaware or other low power modes to reduce po
7. standard GPS firmware is UART configura tion e Serial 0 NMEA 4800 baud 8 data bits no parity 1 stop bit no flow control 3 4 Improved TTFF In order to improve the TTFF Time To First Fix it is recommended to keep Vcc supplied at all times This will allow taking advantage of sophisticated low power mode features of the SiRFstarlV chip set More details can be found in chapter Application Notes V0 3 Jan 10 User s Manual Page 15 of 35 PRELIMINARY WA cotech 4 Mechanical Outline 4 1 Details Component Side A2100 A e 15 24 0 6 15 24 0 6 All dimensions in mm inch Figure 7 Mechanical outline component side A12100 A V0 3 Jan 10 User s Manual Page 16 of 35 PRELIMINARY WV ncotec h 4 2 Details Solder Side A2100 A B 15 24 1 0x0 8 13 716 1 5x 1 5 A E u Soo 12 7 15 24 _ an _ _ _ _ _ _ _ IU UU LT LI LI 1 62 solder pad size outer pads 1 0 x 0 8 Solder pad size inner pads 1 5 x 1 5 All dimensions in mm Figure 8 Mechanical outline solder side A2100 A V0 3 Jan 10 User s Manual Page 17 of 35 PRELIMINARY 5 Pin out Information 5 1 Layout A2100 A RXO SPI DI IN 3 3V 22 TXO SPI DO OUT 3 3V 21 Extint IN 1 8V 20 ON OFF IN 3 3V 19 GC DIO 1 0 1 8V 18 I2C CLK OUT 1 8V 17 TM GPIOS OUT 1 8V 16 VANT IN 3 3 to SVDC 15 N C 14 ANT
8. 10 6 1 Internal Reset Circuit The A2100 A is already equipped with a voltage monitoring device that generates a proper power on reset at the appropriate threshold and delay Additionally it takes care about the brown out protection Usually there is no need to deal with the reset input externally thus the general advice is to leave this pin open 10 6 2 External Reset Circuit Under verification If for some reasons an external reset input is really desired the following in structions are recommended Only use an open drain collector device e g a bipolar NPN transistor to ground see below to pull the nRST pin low in order to issue a reset V0 3 Jan 10 User s Manual Page 31 of 35 V0 3 Jan 10 PRELIMINARY WA cotech nRESET GPS Recel yer RESET nRESET lou active RESET high act ive Figure 14 Application note Recommended external reset circuit User s Manual Page 32 of 35 PRELIMINARY WA cotech 11 Evaluation Kit EVA2100 A For demonstration and easy evaluation of GPS performance Vincotech offers an evaluation kit including one GPS A2100 A module It contains a USB interface with according drivers to connect easily to a PC The USB interface is an extension of the serial port 0 therefore sending NMEA sentences and accepting commands At the same time it provides power to the module Accompanied by an antenna it offers a ready to go set For the development of new software and applications the
9. 14 3 2 2 Active Antennas III emen meminere etie sese ere ese sre se sees e eres 14 3 3 Serial Port Settings MERE ren Enr KENA EE KEENE N EENES EEEE 15 HAAD OVSA TERT EE 15 4 Mechanical Outline NENNT 16 4 1 Details Component Side AZ7OU A nnne 16 4 2 Details Solder Side AZ71O0 A HH IH m meme 17 o d INS ei dh d la te du E EEN 18 e a Ee En OO 18 5 2 Description A2100 A Ee EE 19 5 3 General MMUcmRC TET 20 6 Electrical Characteristics ccccsccecsecsscseceeceenecnsceseeneenecnseeeeeeneenseeseeneeesnennes 21 SNE dn Le Rei el tel eee oo To 21 6 2 Absolute Maximum Ratings eese nnne nnns 21 6 3 DC Electrical Characterstce 0 ceccececececeececececeseeeeeeceeeeesevaeaeneseeeeetenaeaenes 22 raeiigdmumcm 23 7 1 Proposed Footprint for Soldering ccccceccseeceeeeeeceeeeeeseeteeeaeeteeeeeseeteeeneees 23 7 2 Recommended Profile for Reflow Soldering annannennennnnnnnnnnnnnnnnnnnnrnnnnnnnnne 23 8 Use of GPS Antennas uni onuda cud uude cee fen E UE NER VN UEO NR EINE USER NOE CIE RRK CT ED REI 24 8 1 Connecting a GPS antenna to the GPS recenver 0 cecceeceeeeeeeeeeeeeeaeees 24 8 2 Antenna Connechons eee ee mememeet enemies rere rene 26 8 2 1 rib NANI Tm 26 02 2 ANG TUIS LR E Bo CN RT 26 V0 3 Jan 10 User s Manual Page 4 of 35 PRELIMINARY WV ncotec h 9 Quality and Reliability eese eee Leeeee rel eeee eene nnn n nnne n
10. Evaluation Kit also provides NMEA messages on CMOS level via a terminal plug Figure 15 Evaluation kit EVA1084 A similar For further information please contact Vincotech V0 3 Jan 10 User s Manual Page 33 of 35 PRELIMINARY WV ncotec h 12 Related Information 12 1 Contact This manual was created with due diligence We hope that it will be helpful to the user to get the most out of the GPS module Inputs regarding errors or mistaken verbalizations and comments or proposals to Vincotech Germany for further improvements are highly appreciated Vincotech GmbH Biberger Str 93 82008 Unterhaching Munich Germany Tel 49 89 8780 67 0 Fax 49 89 8 80 67 398 gps vincotech com www vincotech com gps 12 2 Related Documents GPS Firmware GSDe Vincotech GPS Evaluation Kit EVA2100 A Vincotech SiRF Binary Reference Manual SIRF SiRF NMEA Reference Manual SIRF 12 3 Related Tools e GPS Cockpit Vincotech e SiRFLive SIRF e SiRFFlash SiRF V0 3 Jan 10 User s Manual Page 34 of 35 PRELIMINARY WV ncotec h 13 List of Figures Foure TAZ TOO A Ne 8 Figure 2 A2100 A tape specifications il 10 Figure 3 A2100 A tape specifications i e 11 Figure 4 A2100 A tape specifications 3 11 Figure 5 Minimum configuration A Z7OU A nennen 13 Figure 6 RS232 level butter 14 Figure 7 Mechanical outline component side A12100 A esses 16 Figure 8 Mechani
11. GND 13 ANT IN RF 12 bel band fro feno al 2 E 8 fel e PL E fel A f fe E Wincotech 1 nRST IN 3 3V 2 BOOTSEL IN 1 8V 3 Vcc 3 3 PWRIN 4 WAKEUP OUT 3 3V 5 Vout OUT 1 8V 6 GND 7 GND amp GPIO6 SPI CLK IN 3 3V 9 GPIO7 SPI CS IN 3 3V 10 N C 11 N G Figure 9 Pin out information bottom view A2100 A C Pin 1 marker V0 3 Jan 10 User s Manual Page 18 of 35 A PRELIMINARY V ncotec h 5 2 Description A2100 A Signals Dn Symbol Function Deserpion pres Input Reset input open HIGH no reset LOW reset see 10 6 Reset Signal Ne Input Special boot mode leave open for normal operation HIGH boot loader active HIGH level 1 8V Power Supply 3 0 3 6 VDC power supply E WAKEUP Output Status of digital section Push Pull output Low OFF KA Keep Alive only Hibernate or Standby mode High ON operational mode Identical logic to RFPWUP of A1084 on same pin 5 Vot Voltage output 1 8V voltage output for up to 20mA current max i Power Supply Ground power supply 7 GND Power Supply Ground power supply EA E Input Configuration pin to run in UART mode 10k pull up to 1 8V e g to Vout pin 5 SPI CLK SPI clock pin when module works in SPI mode GPIO7 Input Unused configuration pin reserved for future use leave open SPI CS SPI chip select pin when module works in SPI mode 10 N MG None
12. Lee open 2 22 Lee open 2 22 Antenna signal Z 50 Ohm antenna input see Note 1 E E13 Antenna Supply o supply antenna provide according voltage up to 5 0 Voltage EA TM TM GPIO5 Output TM GPIO5 Output E leave Reserved leave open 00000000000 E CLK Prepared for I2C clock input for MEMS interface Leave open I2C DIO Input Output Prepared for I2C I O for MEMS interface Leave open 19 ON OFF Input Connect to push pull output This is mandatory Set to LOW by default Toggle to HIGH and back to LOW for first start up after power on to request a fix in PTF mode to wake up out of hibernate mode 200 Extint Prepared for interrupt input for MEMS interface Leave open L1 Output Serial output 0 NMEA out if configured for UART SPI DO SPI data out pin when module works in SPI mode 22 RXO Input Serial input 0 NMEA in if configured for UART SPI DI SPI data in pin when module works in SPI mode Table 4 Pin description A2100 A V0 3 Jan 10 User s Manual Page 19 of 35 PRELIMINARY WA cotech Note 1 An active antenna connected to pin 12 ANT INT must not exceed a gain of tbd dB antenna cable loss according to SIRF recommendation 5 3 General Comments The following comments should be considered for a design using the A2100 A in UART mode e Standard configuration of serial port standard GPS software Serial 0 NMEA 4800 baud 8 data bits no parity 1 stop bit no flow control
13. Vincotech GPS Receivers A2100 A A Description of Vincotech s GPS Receiver Module A2100 A User s Manual Version 0 3 Hardware Revision 50 PRELIMINARY PRELIMINARY WV ncotec h Revision History Rev Date Description 1 1 O 08 24 09 Copied from A1084 V1 1 01 25 10 RoHS pin out clean up 0 3 01 29 10 nWAKEUP correction new pictures ON OFF correction BOOTSEL correction ll 4mm dd yy o O V0 3 Jan 10 User s Manual Page 2 of 35 PRELIMINARY WV ncotec h Disclaimer THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF VINCOTECH GMBH 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 VINCOTECH OR ITS AUTHORIZED AGENTS THE INFORMATION IN THIS DOCUMENT IS TO THE BEST OF OUR KNOWLEDGE ENTIRELY CORRECT HOWEVER VINCOTECH 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 DOCUMEN TATION IS NOT AUTHORIZED FOR USE IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF VINCOTECH THIS DOCUMENT MAY PROVIDE LINKS TO OTHER WORLD WIDE WEB SITES OR RESOURCES BECAUSE VINCOTECH HAS NO CONTROL OVER SUCH SITES AND RESOURCES VINCOTECH SHALL NOT BE RESPONSIBLE FOR THE AVAILABILIT
14. Y OF SUCH EXTERNAL SITES OR RESOURCES AND DOES NOT ENDORSE AND IS NOT RESPONSIBLE OR LIABLE FOR ANY CONTENT ADVERTISING PRODUCTS OR OTHER MATERIALS ON OR AVAILABLE FROM SUCH SITES OR RESOURCES VINCOTECH SHALL NOT BE RESPONSIBLE OR LIABLE DIRECTLY OR INDIRECTLY FOR ANY DAMAGE OR LOSS CAUSED OR ALLEGED TO BE CAUSED BY OR IN CONNECTION WITH USE OF OR RELIANCE ON ANY SUCH CONTENT GOODS OR SERVICES AVAILABLE ON OR THROUGH ANY SUCH SITE OR RESOURCE VINCOTECH RESERVES THE RIGHT TO CHANGE MODIFY OR IMPROVE THIS DOCUMENT OR THE PRODUCT DESCRIBED HEREIN AS SEEN FIT BY VINCOTECH WITHOUT FURTHER NOTICE V0 3 Jan 10 User s Manual Page 3 of 35 PRELIMINARY WV ncotec h Table of Contents uM Io de e Tei te NN TON TTE 6 1 1 Feature EE Ee EE EE EE 6 1 2 Characteristics Overview esssseen II meer remettre renes 6 1 3 RoHS and Lead Free Information eeseeeem 7 VAG Nps EE 8 er E e 9 1 5 1 GPS CharacieristiCS 9 1 5 2 Mechanical Charactertstce emm emere emen renes 9 1 6 Handling Precautions RETE ooo T 9 2 Ordering Information eR 10 2 1 GPS Receivers AZ1OO A tree tereti rere reis 10 ZA PACKING EE E 10 2 9 Additonal EQUIDIMENIE EE 12 3 Quick OIGEL ns cetus ede cie cence deveuededederededecscousdedecevedevevededecscevsdeveusdevecsaevecedsecdeces 13 3 1 Minimum Configuration esseesesseeeeeeeeee nennen nnne nnne nnne nnne nnne nnns 13 EE 14 3 2 1 EE
15. anna annus 27 9 1 Environmental Conditions mme rrr 2f 9 2 Product Qualification eessseseseee Immer 27 9 3 FPFOOUCUOIT 1 CSE TT 2f 10 Applications and e TC 28 10 1 SiRFaware Support A 28 10 2 PUSN tO FIX MOC II IH IH Im mI IR mRmR Reemi 28 10 3 Hibernate e em m 28 10 4 Antenna Status Adaptation eeseeseseseee nennen 29 TO dE Wa En a SS EE 29 10 4 2 Antenna Sensor with Current Lmter He 30 TOS VANT is E 31 NO IRC SEL el TEE TU 31 10 6 1 Internal Reset EEUU 31 10 6 2 External Reset Circuit dd 31 11 Evaluation Kit EVA2100 A WEE 33 12 Related Information NEE 34 PICON e A EA AE 34 12 2 Related Documents 34 12 3 Related WE e e AN 34 iR eI lm tens 35 14 ISU OR TEEN 35 V0 3 Jan 10 User s Manual Page 5 of 35 PRELIMINARY WV ncotec h 1 Introduction The A2100 A is Vincotech s first implementation of CSR s SiRFstarlV chip on a GPS module It is a highly integrated GPS receiver that can be used as an SMT component A very easy implementation power serial and antenna allows receiv ing position velocity and time information 1 1 Feature Overview The A2100 A is based on the well established A1084 B outline and offers new out standing features e Fast responsive location experience o High sensitive navigation engine with tracking sensitivity down to
16. cal outline solder side AZ7O0A 17 Figure 9 Pin out information bottom view A Z7100 A eese 18 Figure 10 Antenna connector strip line A Z100 A 24 Figure 11 Strip line parameters AZ7100 A 24 Figure 12 Application note Antenna sensor adaptation 29 Figure 13 Application note Antenna sensor adaptation with current limiter 30 Figure 14 Application note Recommended external reset circuit 32 Figure 15 Evaluation kit EVA1084 A Iemlart cece cecceecceeeeeeeseeeaeeeeeeeeeeseeees 33 14 List of Tables Table 1 A2100 A GPS charachertstce 9 Table 2 A2100 A dimensions and weiht 9 Table 3 Additional eoupment nennen nenne 12 Table 4 Pin descripllori A2 00 5 cintas Ex Ra qa ei xeu d Ex ea ACE E ERG act Enea 19 Table 5 A2100 A electrical characteristics ccccccccceccecceeeceeceeeseeseeeeeeseeeaeeaees 21 Table 6 PRELIMINRAY absolute maximum ratings esses 21 Table 7 PRELIMINRAY DC electrical characteristic sse 22 Table 8 Reflow soldering profile AZ7100 A 23 V0 3 Jan 10 User s Manual Page 35 of 35
17. ing the finalized product in the appropriate market ap plication In any case it is the responsibility of the designer to test and verify the implementation Current Limiter UA U2 rail to rail single supply Common node on PCB comperator with open drain output Output open drain with pullup R2 High for 9mA lant 18mA Low for lant 9mA or lant gt 18mA Figure 13 Application note Antenna sensor adaptation with current limiter V0 3 Jan 10 User s Manual Page 30 of 35 PRELIMINARY WV ncotec h 10 5 VANT Pin The VANT pin is an input pin The supply voltage for an active GPS antenna on the ANT input has to be fed into the Vant pin The easiest way to do that is to connect Vcc to VANT The maximum current is 50 mA Note Shortcut between ANT and GND may damage the A2100 A GPS receiver module This should be avoided by using an antenna current limiter The circuit chapter 10 4 2 Antenna Sensor with Current Limiter works for Vcc from 3V to 5V The antenna current will be limited to 50 mA approximately If other transistors are used other resistor values may be necessary as well We strongly recommend simulating and testing your realized version before using it 10 6 Reset Signal The nRST pin is an input pin The nRST pin can be used to generate a reset on the A2100 A module Resetting the module will result in a restart of the complete firmware All information stored in SRAM will still be valid
18. lectrical Characteristics Symbol TX0 WAKEUP KE Vol w a e ERI e O ME Table 7 PRELIMINRAY DC electrical characteristic V0 3 Jan 10 User s Manual Page 22 of 35 PRELIMINARY WV ncotec h 7 Mounting This chapter describes the suggested mounting process for the A2100 A receiver modules In a RoHS compliant product with a RoHS compliant process it is recom mended to use chemical tin as the counter part to the module s pins This will guar antee highest resistance against shocks 7 1 Proposed Footprint for Soldering Following soldering footprint parameters are recommended Copper and solder paste footprint are identical Pad shape size inner pads 1 5 mm x 1 5 mm Pad shape size outer pads 1 0 mm x 0 8 mm Stencil thickness of 120 150 um 7 2 Recommended Profile for Reflow Soldering Typical values for reflow soldering of the module in convection or IR convection ov ens are as follows according to IPC JEDEC J STD 020D Peak temperature RoHS compliant process 245 C Average ramp up rate to peak 217 C to Peak 3 C second max Preheat temperature min 150 C max 200 C Ramp up time from min to max preheat temperature 60 120 seconds Temperature maintained above 217 C 60 150 seconds Time within 5 C of actual peak temperature Ramp down rate 6 C second max Time 25 C to peak temperature Table 8 Reflow soldering profile A2100 A The solder pads hold solder of a thickness
19. of about 150 um for improved solder process results As results of soldering may vary among different soldering systems and types of solder and depend on additional factors like density and types of components on board the values above should be considered as a starting point for further optimi zation V0 3 Jan 10 User s Manual Page 23 of 35 PRELIMINARY WA cotech 8 Use of GPS Antennas 8 1 Connecting a GPS antenna to the GPS receiver The ANT pin is used to connect a GPS antenna to the receiver The design of the antenna connection has to be done strictly according to RF design rules A 50 Q PCB strip line is required The following drawings shall explain the guidelines A major rule is to keep the strip line as short as possible Additionally antenna ground ANT GND should be routed to the ground plane of the PCB the ground plane is on a lower PCB layer by vias as demonstrated in the drawing Top view Motherboard Bottom Layer Motherboard Top Layer ANT GND ANT INT ANT GND ANT INT Vias to Top Layer use to GND Layer GPS receiver solder pads Figure 10 Antenna connector strip line A2100 A In order to achieve the impedance of 50 O the width of the strip line needs to be calculated It depends on the thickness or height of the PCB layer both parameters are shown in following drawing For the calculation it is assumed that the PCB ma terial is FR4 900 strip line GPS Module Motherboard AntGND
20. om the ANTSTAT signal generated by this circuit The examples use values for components that roughly result in the following ANTSTAT output e Logic low when lant lt 9mA e Logic high when 9mA gt lant 16mA e logic low when lant gt 16mA 10 4 1 Antenna Sensor The following circuit is a proposal on how you can feed an antenna with 3 3V and provide an output for the ANTSTAT pin The value of the components may need an adaptation in the final application For example the input current of the chosen comparator goes into that equation The thresholds defined in this circuit are quite close to the ones described above Their value is determined by resistors R4 R5 and R3 We strongly recommend simulating and testing the GPS receiver integrated in your product design before implementing the finalized product in the appropriate market application U1 U2 rail to rail single supply Common node on PCB comperator with open drain output open drain with pullup R2 High for 8m lt lant lt 18mA Low for lant lt 8mA or lant gt 18mA Figure 12 Application note Antenna sensor adaptation V0 3 Jan 10 User s Manual Page 29 of 35 PRELIMINARY Wi cotech 10 4 2 Antenna Sensor with Current Limiter This proposal is similar to the first one but includes a current limiter Comments and notes as above apply We strongly recommend simulating and testing the GPS receiver integrated in your product design before implement
21. th 15 24 mm 0 6 Height 2 4 mm 0 095 A2100 A Weight Po 1 2g 0 042 oz Table 2 A2100 A dimensions and weight 1 6 Handling Precautions The GPS receiver module A2100 A is sensitive to electrostatic discharge ESD Please handle with appropriate care V0 3 Jan 10 User s Manual Page 9 of 35 PRELIMINARY Wa cotech 2 Ordering Information 2 1 GPS Receivers A2100 A The order number is built as follows e V23993A2100A xxx V23993 stands for Vincotech s wireless and communication products A2100A for the A2100 A module The xxx refers to the current firmware version on the mod ule If no firmware version is referenced in an order the latest version will be pro vided 2 2 Packing of the A2100 A The A2100 A GPS modules come in a tape and reel package suitable for pick and place machines F t ed 3 poc da uo 5 0 0090 800000000 DP po 210 ha eal 5 0 1 F rr E 30 1 lOxPO 40 40 2 A 1 sett Figure 2 A2100 A tape specifications 1 V0 3 Jan 10 User s Manual Page 10 of 35 PRELIMINARY Wa cotech Figure 3 A2100 A tape specifications 2 Figure 4 A2100 A tape specifications 3 One complete reel holds 900 A2100 A modules One box holds three reels so a total of 2 700 A2100 A modules V0 3 Jan 10 User s Manual Page 11 of 35 PRELIMINARY WA cotech 2 3 Additional Equipment V23993EVA2100A Evaluation Kit including one module V23993A2100A Table 3
22. the antenna bias can be provided through the VANT pin V0 3 Jan 10 User s Manual Page 26 of 35 PRELIMINARY WV ncotec h 9 Quality and Reliability 9 1 Environmental Conditions Operating temperature 40 85 C Operating humidity Max 85 r H non condensing at 85 C MSL JEDEC Moisture Sensitivity Level 6 months in original package Table 6 Environmental conditions 9 2 Product Qualification Prior to product qualification the GPS receiver is preconditioned according to EIA JEDEC standard JESD22 A113 B Level 3 Basic qualification tests MSL Classification according to J STD 020C MSL3 245 C MSL Rework Compatibility according to J STD 020C Temperature Cycling 40 C 85 C Temperature Humidity Bias 70 C 85 RH Low High Temperature Operating 40 C 85 C High Temperature Operating Life 85 C Vibration Variable Frequency Mechanical Shock Please contact Vincotech for detailed information 9 3 Production Test Each module is electrically tested prior to packing and shipping to ensure state of the art GPS receiver performance and accuracy V0 3 Jan 10 User s Manual Page 27 of 35 PRELIMINARY WV ncotec h 10 Applications and Hints 10 1 SiRFaware Support Detailed information will be provided 10 2 Push to Fix Mode Push to Fix mode is designed for the application that requires infrequent position reporting The receiver generally stays in a low power mode up to 2 hours
23. wer consumption of the module while no position information is required V0 3 Jan 10 User s Manual Page 13 of 35 PRELIMINARY Kn ncotec h 3 3V RS232 Out e 1 RES Tx 3 de P SS GND Figure 6 RS232 level shifter Remarks e Place C1 to C5 here 0 1uF close to MAX3232 For capacity values see datasheet of actual component used e Use 3 3V level shifter MAX3232 or equivalent e External antenna input impedance is 50 Q Match as close as possible 3 2 Antennas Generally the quality of the GPS antenna chosen passive or active is of para mount importance for the overall sensitivity of the GPS system Losses through a bad antenna long cables or tracks or a bad antenna position can t be compensated afterwards 3 2 1 Passive Antennas The A2100 A supports passive antennas via an integrated LNA directly 3 2 2 Active Antennas The A2100 A also supports active antennas directly i e by offering an antenna voltage feed pin VANT pin 15 If this connection is used it is recommended to use an active antenna with a supply voltage of 3 to 5 VDC and a current draw of 50 mA maximum The antenna should have a gain 2 20dB but the total gain antenna gain minus cable loss at the antenna input of the module should not exceed tbd dB cable loss and a noise figure lt 1 5dB V0 3 Jan 10 User s Manual Page 14 of 35 PRELIMINARY WA cotech 3 3 Serial Port Settings The default configuration within the
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