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 ........................................................................................ 70
8.1.
Storage ................................................................................................................................... 70
8.2.
Manufacturing and Soldering .................................................................................................. 71
8.3.
Packaging ............................................................................................................................... 72
9
Appendix A References .................................................................................................................. 74
