ML865G1 HW Design Guide
1VV0301632 Rev. 4 Page 7 of 86 2020-09-23
External SIM Holder ..................................................................... 55
ADC Converter ............................................................................. 55
5.11.1. Using ADC Converter ................................................................... 56
Forced USB boot .......................................................................... 56
6. RF SECTION ................................................................................ 57
Bands Variants ............................................................................. 57
TX Output power .......................................................................... 57
RX Sensitivity ............................................................................... 57
Antenna requirements .................................................................. 57
6.4.1. PCB Design guidelines ................................................................. 58
6.4.2. PCB Guidelines in case of FCC Certification ............................... 60
6.4.2.1. Transmission line design .............................................................. 60
6.4.2.2. Transmission Line Measurements................................................ 62
6.4.2.3. Antenna Installation Guidelines .................................................... 64
7. AUDIO SECTION ......................................................................... 65
Electrical Characteristics .............................................................. 65
Codec examples ........................................................................... 65
8. GNSS SECTION .......................................................................... 66
GNSS Signals Pin-out .................................................................. 66
RF Front End Design .................................................................... 66
8.2.1. Guidelines of PCB line for GNSS Antenna ................................... 66
8.2.2. Hardware-based solution for GNSS and LTE coexistence ........... 67
GNSS Antenna Requirements ..................................................... 67
8.3.1. GNSS Antenna specification ........................................................ 67
8.3.2. GNSS Antenna – Installation Guidelines ...................................... 68
8.3.3. Powering the External LNA (active antenna) ................................ 68
GNSS Characteristics .................................................................. 69
9. MECHANICAL DESIGN............................................................... 70
Drawing ........................................................................................ 70
10. APPLICATION PCB DESIGN ...................................................... 71
General ......................................................................................... 71
Footprint ....................................................................................... 71
PCB pad design ........................................................................... 73
PCB pad dimensions .................................................................... 73
Stencil ........................................................................................... 74
Solder paste ................................................................................. 75
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