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8: Use of External Antenna 

GNSS Receiver Module A5135-H User Guide 

 

27 

 

8.2 External Antenna 

8.2.1 Recommended Parameters 

General GPS+GLONASS active antenna specification: 

 

Limitations: 

•

  Supply voltage according to voltage fed into VANT pin (5 V max.) 

•

  Supply current 50 mA (max.) 

 

Recommendations: 

•

 

Gain ≥ 20 dB 

(should not exceed 35 dB) 

•

 

Noise figure ≤ 1.5 dB

 

 

The recommendations apply to most active antennas that can be found in the mar-

ket. The quality and suitability of the GPS+GLONASS antenna chosen is great im-

portance to the overall sensitivity of the GPS+GLONASS system. 

 

The system design needs to reflect the supply voltage of the antenna. If the supply 

voltage is equal to Vcc, then it could be connected to VANT. If the antenna requires 

a different supply voltage, the antenna bias can be provided through the VANT pin. 

 

8.2.2 Hints 

Unused antenna inputs should be terminated with 50 

Ω

 

±

 20%. Do not feed the an-

tenna supply voltage into terminated antenna inputs. 

Summary of Contents for A5135-H

Page 1: ...GNSS Receiver Module A5135 H User Guide Part Number PMD 00034 Revision B May 2020 ...

Page 2: ...er Drive Suite 100 Irvine CA 92618 USA Toll Free 800 526 8766 Phone 949 453 3990 Fax 949 453 3995 Technical Support Online www lantronix com support Sales Offices For a current list of our domestic and international sales offices go to the Lantronix web site at www lantronix com about us contact Disclaimer All information contained herein is provided AS IS Lantronix undertakes no obligation to upd...

Page 3: ...ware is subject to the terms of the applicable license OPEN SOURCE SOFTWARE IS DISTRIBUTED WITHOUT ANY WARRANTY INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SEE THE APPLICABLE LICENSE AGREEMENT FOR ADDITIONAL INFORMATION You may request a list of the open source components and the licenses that apply to them Contact your regional Lantronix sales associate w...

Page 4: ..._______________________________11 1 5 2 Mechanical Characteristics ________________________________________11 1 6 Handling Precautions _________________________________________________11 2 Ordering Information 12 2 1 GNSS Receiver A5135 H ______________________________________________12 2 2 Packing ____________________________________________________________12 2 3 Additional Equipment_____________...

Page 5: ... 9 2 Product Qualification __________________________________________________28 9 3 Production Test ______________________________________________________28 10 Applications and Hints 29 10 1 Initial Module Start___________________________________________________29 10 2 Proper Shutdown____________________________________________________29 10 3 SiRFawareTM Support ___________________________________...

Page 6: ...ions 16 Figure 7 Self start configuration A5135 H 17 Figure 8 Mechanical outline component side A5135 H 18 Figure 9 Mechanical outline solder side A5135 H 19 Figure 10 Pin out information top view A5135 H 20 Figure 11 Proposal of Soldering footprint 24 Figure 12 Proposal 1 of the PCB design 24 Figure 13 Proposal 2 of the PCB design 25 Figure 14 Antenna connector strip line A5135 H 26 Figure 15 Str...

Page 7: ...2 A5135 H dimensions and weight 11 Table 3 Additional equipment 14 Table 4 Pin description A5135 H 21 Table 5 A5135 H electrical characteristics 22 Table 6 Absolute maximum ratings 22 Table 7 DC electrical characteristics 23 Table 8 Reflow soldering profile A5135 H 25 Table 9 Environmental conditions 28 ...

Page 8: ...owing outstanding features Fast responsive location experience o High sensitive navigation engine with tracking down to 165dBm o 52 track verification channels o SBAS WAAS EGNOS MSAS GAGAN o Concurrent tracking of multiple constellations of the GPS and GLONASS systems Breakthrough micro power technology o Requires only 50 500µA to maintain hot start capability Active jammer remover o Removes in ba...

Page 9: ...ead free Tape reel packaging Excellent antenna support o On module patch antenna o Antenna input for direct connection of external active antenna o RF switch to select between antennas The antenna receiver module is available as an off the shelf component 100 tested and shipped in tape and reel packaging 1 3 RoHS and Lead Free Information Lantronix s products marked with the lead free symbol eithe...

Page 10: ... of assembly and a 6 digit serial number Due to limited space on module label only product type year week of assembly and 6 digit serial number will be printed on it Representing Factory loca tion Product Number Part Number Software Release Hardware Release Assembly Year Week Serial Number Number of digits 16 XX XXXXXXX XXXX XX XX XXXX XXXXXX 2 6 4 2 2 4 6 Example TF A5135H 9333 01 01 1211 000005 ...

Page 11: ...istics 1 The calibrated clock of the receiver has not stopped thus it knows precise time to the µs level 2 The receiver has estimates of time date position and valid almanac and ephemeris data 3 The receiver has estimates of time date position and recent almanac 4 The receiver has no estimate of time date position and no recent almanac Note Performance sensitivity and TTFF might slightly decrease ...

Page 12: ... A5135 H The order number is built as follows A5135 Hxxxx A5135 H is the model name The xxxx refers to the current part number on the module 2 2 Packing The A5135 H GNSS modules come in a tape and reel package suitable for pick and place machines Figure 2 A5135 H tape specifications 1 ...

Page 13: ...ure 3 A5135 H tape specifications 2 Figure 4 A5135 H tape specifications 3 One complete reel holds 500 A5135 H modules Packaging for shipment One box holds 1 reel Reel diameter 38 cm Outer Box dimensions 38 8 W x 38 8 L x 5 7 H cm Gross weight 5 06 Kg Net weight 4 13 Kg ...

Page 14: ...ver Module A5135 H User Guide 14 2 3 Additional Equipment EVA5135 H Evaluation Kit including one module A5135 H Table 3 Additional equipment A detailed description of the EVA5135 H Evaluation Kit can be found in the appro priate manual ...

Page 15: ...3 To let existing A2235 H customers to drop in replace original design with A5135 H they must send an NMEA command to switch the protocol and baud rate to NMEA 4 800 Command PSRF100 1 4800 8 1 0 0E 3 1 Minimum Configuration The following picture shows the minimum configuration for NMEA or binary outputs received and commands sent via an RS232 interface based on the GNSS module A5135 H Figure 5 Min...

Page 16: ... values see datasheet of actual component used Use 3 3V level shifter MAX3232 or equivalent GND 1 2 3 4 5 6 7 8 9 C1 0 1µF C2 0 1µF C3 0 1µF C4 0 1µF C5 0 1µF RS232 Level Shifter RS232 Out DB9 female 3 3V Vcc GND T1O R1I R1O T1I T2I R2O C1 V C1 C2 C2 V T2O R2I MAX3232 Tx Rx GND 1 2 3 4 5 6 7 8 9 C1 0 1µF C2 0 1µF C3 0 1µF C4 0 1µF C5 0 1µF RS232 Level Shifter RS232 Out DB9 female 3 3V Vcc GND T1O ...

Page 17: ...tion defined by the external pull up resistor as outlined in Minimum Configuration the default serial port settings are NMEA 9600 baudrate 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 SiRFstarV ROM ...

Page 18: ...GNSS Receiver Module A5135 H User Guide 18 4 Mechanical Outline 4 1 Detailed Component Side A5135 H All dimensions in mm inches Figure 8 Mechanical outline component side A5135 H ...

Page 19: ... GNSS Receiver Module A5135 H User Guide 19 4 2 Detailed Solder Side A5135 H Solder pad size outer pads 1 0 x 0 8 Solder pad size inner pads 1 27 x 1 27 All dimensions in mm Figure 9 Mechanical outline solder side A5135 H ...

Page 20: ...GNSS Receiver Module A5135 H User Guide 20 5 Pin out Information 5 1 Layout A5135 H Figure 10 Pin out information top view A5135 H ...

Page 21: ...r I2C mode Leave open for SPI mode 9 GND Power Supply Ground power supply 10 ANT_EXT Antenna Input Antenna signal Z 50 Ohm external active antenna input 11 VANT Power supply Power supply antenna provide according voltage up to 5 0 VDC VANT feeds Pin 10 ANT_EXT 12 ANT_SW Input Antenna switch LOW or open internal antenna HIGH ex ternal antenna 13 GPIO2 None Leave open 14 NC None Leave open 15 NC Non...

Page 22: ...he first two seconds of TTFF 3 Tracking current typically includes tracking and the post searching portion of TTFF 6 2 Absolute Maximum Ratings Symbol Parameter Min Max Unit Vcc Power supply 0 3 4 6 V Vin Voltage to I O pin 0 3 3 6 V Iov Input current on any pin 10 10 mA Itdv Absolute sum of all input currents during overload condition 200 mA Tst Storage temperature 40 85 C Table 6 Absolute maximu...

Page 23: ...User Guide 23 6 3 DC Electrical Characteristics Symbol Parameter Min Max Unit TX0 WAKEUP Voh 4mA 0 75Vcc Vcc V Vol 4mA 0 40 V RX0 Vih 0 7Vcc Vcc V Vil 0 40 V nRST For safe reset 0 2 V ON_OFF Vih 0 7Vcc Vcc V Vil 0 3 0 40 V Table 7 DC electrical characteristics ...

Page 24: ...encil thickness of 150µm marks the center of the through holes Figure 11 Proposal of Soldering footprint Please note that copper and solder paste footprints are identical The final footprint should be evaluated and qualified by the manufacturer according to the specific pro cess 7 2 PCB Design Guide 1 Drill a through hole with diameter greater than or equal to 3mm in the application PCB which is u...

Page 25: ...re as follows according to IPC JEDEC J STD 020D Parameter Value 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 30 seconds Ramp down rate 6 C secon...

Page 26: ...e 50 Ω PCB strip line is required the strip line needs a good reference ground Figure 14 Antenna connector strip line A5135 H To achieve the impedance of 50 Ω 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 material is FR4 Figure 15 Strip line para...

Page 27: ...t active antennas that can be found in the mar ket The quality and suitability of the GPS GLONASS antenna chosen is great im portance to the overall sensitivity of the GPS GLONASS system The system design needs to reflect the supply voltage of the antenna If the supply voltage is equal to Vcc then it could be connected to VANT If the antenna requires a different supply voltage the antenna bias can...

Page 28: ...tandard JESD22 A113 B Level 3 Basic qualification tests MSL Classification according to J STD 020C MSL3 245 C Refer to report SZRL2011110048 MSL Rework Compatibility according to J STD 020C Refer to report SZRL2011110048 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 Mecha...

Page 29: ...llected from satellites in view or Extended Ephemeris methods The SiRFawareTM mode is entered using the One Socket Protocol an extension of the SiRF Binary Protocol Please refer to the appropriate manual To request a fix and to exit SiRFawareTM it is necessary to toggle the ON_OFF pin Toggling is done by pulling the signal to HIGH 10 4 Push to Fix Mode Push to Fix mode is designed for the applicat...

Page 30: ...or accurate timing due to the synchronized atomic clocks in the GPS GLONASS satellites While the current date and time is transmitted in NMEA sentences UTC an exact and accu rate timing signal is provided via the 1PPS pin of the A5135 H GPS GLONASS re ceiver Under good signal conditions the 1PPS signal comes between 620ns and 710ns after the full GPS GLONASS system second which is accurately aroun...

Page 31: ...is the default update rate to change to the 5Hz update rate please refer to command below Enable 5Hz Navigation Update Rate command NMEA command MID103 PSRF103 00 6 00 0 23 OSP command MID136 A0 A2 00 0E 88 00 00 04 04 00 00 00 00 00 00 00 0F 02 00 A1 B0 B3 Disable 5Hz and return to 1Hz Navigation Update Rate command NMEA command MID103 PSRF103 00 7 00 0 22 OSP command MID136 A0 A2 00 0E 88 00 00 ...

Page 32: ...rs 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 Evaluation Kit also pro vides NMEA messages on CMOS level via a terminal plug Figure 17 Evaluation k...

Page 33: ...ion 12 1 Related Documents GPS GLONASS Evaluation Kit EVA5135 H Lantronix Power ONOFF Sequences and Power On Reset POR on A2100 AB Lantronix SiRF OSP Reference Manual CSR SiRF NMEA Reference Manual CSR 12 2 Related Tools GPS GLONASS Cockpit Lantronix SiRFLive CSR ...

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