Quectel BG77 - Page 5

LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 4 / 76
3.15. Behaviors of RI* ..................................................................................................................... 45
3.16. USB_BOOT Interface ............................................................................................................. 45
3.17. ADC Interfaces ....................................................................................................................... 46
3.18. SPI Interface* ......................................................................................................................... 47
3.19. GPIO Interfaces* .................................................................................................................... 48
3.20. GRFC Interfaces* ................................................................................................................... 49
4 GNSS Receiver ................................................................................................................................ 50
4.1. General Description ................................................................................................................ 50
4.2. GNSS Performance ................................................................................................................ 50
4.3. Layout Guidelines ................................................................................................................... 51
5 Antenna Interfaces .......................................................................................................................... 52
5.1. Main Antenna Interface .......................................................................................................... 52
5.1.1. Pin Definition ................................................................................................................ 52
5.1.2. Operating Frequency ................................................................................................... 52
5.1.3. Reference Design of RF Antenna Interface ................................................................. 53
5.1.4. Reference Design of RF Layout ................................................................................... 54
5.2. GNSS Antenna Interface ........................................................................................................
56
5.3. Antenna Installation ................................................................................................................ 57
5.3.1. Antenna Requirements ................................................................................................ 57
5.3.2. Recommended RF Connector for Antenna Installation ................................................ 58
6 Electrical, Reliability and Radio Characteristics .......................................................................... 60
6.1. Absolute Maximum Ratings .................................................................................................... 60
6.2. Power Supply Ratings ............................................................................................................ 60
6.3. Operation and Storage Temperatures .................................................................................... 61
6.4. Current Consumption ............................................................................................................. 61
6.5. RF Output Power .................................................................................................................... 63
6.6. RF Receiving Sensitivity ......................................................................................................... 64
6.7. Electrostatic Discharge ........................................................................................................... 65
7 Mechanical Dimensions.................................................................................................................. 66
7.1. Mechanical Dimensions of the Module ................................................................................... 66
7.2. Recommended Footprint ........................................................................................................ 68
7.3. Design Effect Drawings of the Module .................................................................................... 69
8 Storage, Manufacturing and Packaging ........................................................................................ 7
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8.1. Storage ................................................................................................................................... 70
8.2. Manufacturing and Soldering .................................................................................................. 71
8.3. Packaging ............................................................................................................................... 72
9 Appendix A References .................................................................................................................. 74