Related Manuals for Ublox NEO-M8N
Summary of Contents for Ublox NEO-M8N
- Page 1 NEO-8Q / NEO-M8 u-blox 8 / M8 GNSS modules Hardware integration manual Abstract This document describes the features and specifications of u-blox NEO-8Q and NEO-M8 series modules. UBX-15029985 - R08 C1-Public www.u-blox.com...
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Page 2: Document Information
NEO-M8J/N/M/Q/T Declaration of Conformity (DoC) is available at www.u-blox.com in Support > Product resources > Conformity Declaration. This document applies to the following products: Product name Type number ROM/FLASH version PCN reference NEO-M8N NEO-M8N-0-11 FLASH FW SPG 3.01 UBX-20013367 NEO-M8M NEO-M8M-0-11 ROM SPG 3.01 UBX-21015022 NEO-M8Q NEO-M8Q-0-11 ROM SPG 3.01... -
Page 3: Table Of Contents
NEO-8Q / NEO-M8 - Hardware integration manual Contents Document information ..........................2 Contents ................................3 Hardware description ........................... 5 1.1 Overview ................................ 5 1.2 Configuration ............................... 5 1.3 Connecting power ............................5 1.3.1 VCC: Main supply voltage ......................... 5 1.3.2 V_BCKP: Backup supply voltage ...................... 5 1.3.3 VDD_USB: USB interface power supply .................. - Page 4 NEO-8Q / NEO-M8 - Hardware integration manual 4.2 Soldering ..............................19 4.3 EOS/ESD/EMI precautions ........................22 4.4 Applications with cellular modules ......................25 Appendix ............................... 27 Glossary ..............................27 Recommended parts ......................... 27 Related documents ........................... 29 Revision history ............................30 Contact ................................31 UBX-15029985 - Production information Contents Page 4 of 5...
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Page 5: Hardware Description
RAM), then the modified configuration will be retained, as long as the backup battery supply is not interrupted. For the NEO-M8N and NEO-M8J modules, configuration can be saved permanently in SQI flash. 1.3 Connecting power The u-blox NEO-8Q and NEO-M8 series modules have three power supply pins: VCC, V_BCKP, and VDD_USB. -
Page 6: Vdd_Usb: Usb Interface Power Supply
NEO-8Q / NEO-M8 - Hardware integration manual Figure 1: Backup battery and voltage (for exact pin orientation, see the corresponding product data sheet) ☞ Avoid high resistance on the V_BCKP line: During the switch from main supply to backup supply, a short current adjustment peak can cause high voltage drop on the pin with possible malfunctions. -
Page 7: Usb
NEO-8Q / NEO-M8 - Hardware integration manual 1.4.2 A USB version 2.0 FS (Full Speed, 12 Mbit/s) compatible interface is available for communication as an alternative to the UART. The USB_DP integrates a pull-up resistor to signal a full-speed device to the host. -
Page 8: Spi
NEO-8Q / NEO-M8 - Hardware integration manual For more information about the DDC implementation, see the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification [4]. For bandwidth information, see the corresponding product data sheet. For timing parameters, consult the I2C-bus specification [7]. ☞... -
Page 9: Safeboot_N
The TIMEPULSE2 output must not be held LOW during start-up. 1.5.7 LNA_EN: LNA enable On NEO-M8N, NEO-M8J, NEO-M8Q, NEO-M8T and NEO-8Q modules, in power save mode, the system can turn on/off an optional external LNA using the LNA_EN signal in order to optimize power consumption. -
Page 10: Electromagnetic Interference On I/O Lines
NEO-8Q / NEO-M8 - Hardware integration manual 1.6 Electromagnetic interference on I/O lines Any I/O signal line with a length greater than approximately 3 mm can act as an antenna and may pick up arbitrary RF signals transferring them as noise into the GNSS receiver. This specifically applies to unshielded lines, in which the corresponding GND layer is remote or missing entirely, and lines close to the edges of the printed circuit board. -
Page 11: Design
NEO-8Q / NEO-M8 - Hardware integration manual Design 2.1 Pin description Function Pin Description Remarks Power Supply voltage Provide clean and stable supply. 10, 12, Ground Assure a good GND connection to all GND pins of the module, 13, 24 preferably with a large ground plane. -
Page 12: Pin Name Changes
NEO-8Q / NEO-M8 - Hardware integration manual 2.1.1 Pin name changes Selected pin names have been updated to agree with a common naming convention across u-blox modules. The pins have not changed their operation and are the same physical hardware but with updated names. -
Page 13: Antenna
Figure 6 shows a minimal setup for a design with a good GNSS patch antenna. For exact pin orientation, see the corresponding product data sheet. Figure 6: NEO-M8N/J/T/Q and NEO-8Q passive antenna design Figure 7 and Figure 8 show designs using an external LNA and SAW to increase the sensitivity for optimum performance with passive antenna. - Page 14 An external LNA is only required if the antenna is far away. In that case, the LNA must be placed close to the passive antenna. Figure 8: NEO-M8N/J/T/Q and NEO-8Q module design with passive antenna and an external LNA The LNA_EN pin (LNA enable) can be used to turn on and off an optional external LNA.
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Page 15: Active Antenna Design
NEO-8Q / NEO-M8 - Hardware integration manual 2.4.2 Active antenna design Active antennas have an integrated low-noise amplifier. Active antennas require a power supply that will contribute to the total GNSS system power consumption budget with additional 5 to 20 mA typically. -
Page 16: Layout Design-In: Thermal Management
NEO-8Q / NEO-M8 - Hardware integration manual 2.5 Layout design-in: Thermal management During design-in, do not place the module near sources of heating or cooling. The receiver oscillator is sensitive to sudden changes in ambient temperature which can adversely impact satellite signal tracking. -
Page 17: Migration To U-Blox 8 / M8 Modules
NEO-8Q / NEO-M8 - Hardware integration manual Migration to u-blox 8 / M8 modules 3.1 Migrating u-blox 7 designs to NEO-8Q and NEO-M8 series modules u-blox is committed to ensuring that products in the same form factor are backwards compatible over several technology generations. -
Page 18: Software Migration
M8/8. 23 VCC Supply Supply voltage voltage NEO-8Q / NEO-6Q / NEO-M8N/Q/J: No difference for NEO-8Q / NEO-M8J/N/Q M/P/V/T: 2.7 – 3.6 V Extended supply voltage range for NEO-M8M 2.7 – 3.6 V NEO-M8M: NEO-6G: 1.65 –... -
Page 19: Product Handling
NEO-8Q / NEO-M8 - Hardware integration manual Product handling 4.1 Packaging, shipping, storage and moisture preconditioning For information pertaining to reels and tapes, moisture sensitivity levels (MSL), shipment and storage information, as well as drying for preconditioning see the corresponding product data sheet. Population of modules ☞... - Page 20 NEO-8Q / NEO-M8 - Hardware integration manual • Peak reflow temperature: 245 °C Cooling phase A controlled cooling avoids negative metallurgical effects of the solder (solder becomes more brittle) and possible mechanical tensions in the products. Controlled cooling helps to achieve bright solder fillets with a good shape and low contact angle.
- Page 21 NEO-8Q / NEO-M8 - Hardware integration manual Repeated reflow soldering Only single reflow soldering processes are recommended for boards populated with u-blox modules. To avoid upside down orientation during the second reflow cycle, do not submit u-blox modules to two reflow cycles on a board populated with components on both sides.
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Page 22: Eos/Esd/Emi Precautions
NEO-8Q / NEO-M8 - Hardware integration manual Grounding metal covers Attempts to improve grounding by soldering ground cables, wick or other forms of metal strips directly onto the EMI covers is done at the customer’s own risk. The numerous ground pins should be sufficient to provide optimum immunity to interferences and noise. - Page 23 NEO-8Q / NEO-M8 - Hardware integration manual • Before mounting an antenna patch, connect ground of the device. • When handling the RF pin, do not come into contact with any charged capacitors and be careful when contacting materials that can develop charges (e.g. patch antenna ~10 pF, coax cable ~50 –...
- Page 24 NEO-8Q / NEO-M8 - Hardware integration manual EOS protection measures ☞ For designs with GNSS positioning modules and wireless (for example, cellular) transceivers in close proximity, ensure sufficient isolation between the wireless and GNSS antennas. If wireless power output causes the specified maximum power input at the GNSS RF_IN to be exceeded, employ EOS protection measures to prevent overstress damage.
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Page 25: Applications With Cellular Modules
NEO-8Q / NEO-M8 - Hardware integration manual 4.4 Applications with cellular modules GSM terminals transmit power levels up to 2 W (+33 dBm) peak, 3G and LTE up to 250 mW continuous. Consult the corresponding product data sheet for the absolute maximum power input at the GNSS receiver. - Page 26 NEO-8Q / NEO-M8 - Hardware integration manual Measures against in-band interference include: • Maintaining a good grounding concept in the design • Shielding • Layout optimization • Filtering • Placement of the GNSS antenna • Adding a CDMA, cellular, WCDMA band pass filter before handset antenna Out-band interference Out-band interference is caused by signal frequencies that are different from the GNSS carrier (see Figure 16).
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Page 27: Appendix
NEO-8Q / NEO-M8 - Hardware integration manual Appendix A Glossary Abbreviation Definition ANSI American National Standards Institute BeiDou Chinese navigation satellite system CDMA Code Division Multiple Access Electromagnetic compatibility Electromagnetic interference Electrical Overstress Electrostatic Protective Area Electrostatic discharge Galileo European navigation system GLONASS Russian satellite system Ground... - Page 28 NEO-8Q / NEO-M8 - Hardware integration manual Part Manufacturer Part ID Remarks Parameters to consider Murata SAFFB1G58KB0F0A GPS+GLONASS Low insertion loss, only for mobile application TAI-SAW TA1573A GPS+GLONASS Low insertion loss TAI-SAW TA1343A GPS+GLONASS+BeiDou Low insertion loss TAI-SAW TA0638A GPS+GLONASS+BeiDou Low insertion loss NJG1143UA2 Low noise figure, up to 15 dBm RF input power...
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Page 29: Related Documents
NEO-8Q / NEO-M8 - Hardware integration manual Related documents NEO-M8 Data sheet (FW3), UBX-15031086 NEO-8Q Data sheet, UBX-15031913 NEO / LEA-M8T Data sheet (FW3), UBX-15025193 u-blox 8 / u-blox M8 Receiver Description including Protocol Specification (Public version), UBX- 13003221 GPS Antenna Application note, GPS-X-08014 GPS Compendium, GPS-X-02007 I2C-bus specification, Rev. -
Page 30: Revision History
Updated section 3.2 Hardware migration (NEO-M8M supply voltage) 26-May-2020 msul Updated type number and PCN reference for NEO-M8N, NEO-M8Q, NEO-M8T, and NEO-8Q in page 2, added thermal management statement in section 2.5. 05-May-2021 oola Added NEO-M8J variant information, updated NEO-M8M type number and PCN reference on page 2. -
Page 31: Contact
NEO-8Q / NEO-M8 - Hardware integration manual Contact For complete contact information, visit us at www.u-blox.com. u-blox Offices North, Central and South America Headquarters Asia, Australia, Pacific Europe, Middle East, Africa u-blox America, Inc. u-blox Singapore Pte. Ltd. u-blox AG Phone: +1 703 483 3180 Phone:...
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