Product Info

LPWA Module Series
BG95 Series Hardware Design
BG95_Series_Hardware_Design 9 / 106
Figure Index
Figure 1: Functional Diagram of BG95-M3 .............................................................................................. 19
Figure 2: Pin Assignment (Top View) ...................................................................................................... 24
Figure 3: Sleep Mode Application via UART ........................................................................................... 37
Figure 4: Power Supply Limits during Burst Transmission (BG95-M3/-M5) ............................................ 39
Figure 5: Star Structure of the Power Supply .......................................................................................... 39
Figure 6: Turn on the Module Using Driving Circuit ................................................................................. 40
Figure 7: Turn on the Module Using Keystroke ....................................................................................... 41
Figure 8: Power-on Timing ...................................................................................................................... 41
Figure 9: Power-off Timing ...................................................................................................................... 42
Figure 10: Reset Timing .......................................................................................................................... 43
Figure 11: Reference Circuit of RESET_N by Using Driving Circuit ........................................................ 43
Figure 12: Reference Circuit of RESET_N by Using Button .................................................................... 44
Figure 13: Reference Circuit of PON_TRIG ............................................................................................ 45
Figure 14: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector ........................ 46
Figure 15: Reference Circuit of (U)SIM Interface with a 6-Pin (U)SIM Card Connector .......................... 46
Figure 16: Reference Design of USB Interface ....................................................................................... 48
Figure 17: Main UART Reference Design (Translator Chip) ................................................................... 51
Figure 18: Main UART Reference Design (Transistor Circuit) ................................................................. 51
Figure 19: Reference Circuit with Dual-Transistor Circuit (Recommended for GNSS UART) ................. 52
Figure 20: Reference Circuit of PCM Application with Audio Codec ....................................................... 53
Figure 21: Reference Circuit of the Network Status Indicator .................................................................. 54
Figure 22: Reference Design of STATUS ............................................................................................... 55
Figure 23: Reference Design of USB_BOOT Interface ........................................................................... 56
Figure 24: Timing of Turning on Module with USB_BOOT ...................................................................... 57
Figure 25: Reference Design of Main Antenna Interface ......................................................................... 65
Figure 26: Microstrip Design on a 2-layer PCB ....................................................................................... 65
Figure 27: Coplanar Waveguide Design on a 2-layer PCB ..................................................................... 66
Figure 28: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) ................... 66
Figure 29: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) ................... 66
Figure 30: Reference Circuit of GNSS Antenna Interface ....................................................................... 68
Figure 31: Dimensions of the U.FL-R-SMT Connector (Unit: mm) .......................................................... 70
Figure 32: Mechanicals of U.FL-LP Connectors ...................................................................................... 70
Figure 33: Space Factor of Mated Connector (Unit: mm) ........................................................................ 71
Figure 34: Module Top and Side Dimensions ......................................................................................... 91
Figure 35: Module Bottom Dimensions (Bottom View) ............................................................................ 92
Figure 36: Recommended Footprint (Top View)...................................................................................... 93
Figure 37: Top View of the Module .......................................................................................................... 94
Figure 38: Bottom View of the Module .................................................................................................... 94
Figure 39: Recommended Reflow Soldering Thermal Profile .................................................................. 96
Figure 40: Tape Dimensions ................................................................................................................... 98
Figure 41: Reel Dimensions .................................................................................................................... 98