Product Info

LPWA Module Series
BG95 Series Hardware Design
BG95_Series_Hardware_Design 8 / 106
Figure Index
Figure 1: Functional Diagram of BG95-M3 ................................................................................................ 20
Figure 2: Pin Assignment (Top View) ........................................................................................................ 25
Figure 3: Sleep Mode Application via UART ............................................................................................. 38
Figure 4: Power Supply Limits during Burst Transmission (BG95-M3/-M5) .............................................. 40
Figure 5: Star Structure of the Power Supply ............................................................................................ 40
Figure 6: Turn on the Module Using Driving Circuit ................................................................................... 41
Figure 7: Turn on the Module Using Keystroke ......................................................................................... 42
Figure 8: Power-on Timing ......................................................................................................................... 42
Figure 9: Power-off Timing ......................................................................................................................... 43
Figure 10: Reset Timing ............................................................................................................................. 44
Figure 11: Reference Circuit of RESET_N by Using Driving Circuit ......................................................... 44
Figure 12: Reference Circuit of RESET_N by Using Button...................................................................... 45
Figure 13: Reference Circuit of PON_TRIG .............................................................................................. 46
Figure 14: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector ......................... 47
Figure 15: Reference Circuit of (U)SIM Interface with a 6-Pin (U)SIM Card Connector ........................... 47
Figure 16: Reference Design of USB Interface ......................................................................................... 49
Figure 17: Main UART Reference Design (Translator Chip) ..................................................................... 52
Figure 18: Main UART Reference Design (Transistor Circuit) .................................................................. 52
Figure 19: Reference Circuit with Dual-Transistor Circuit (Recommended for GNSS UART) .................. 53
Figure 20: Reference Circuit of PCM Application with Audio Codec ......................................................... 54
Figure 21: Reference Circuit of the Network Status Indicator ................................................................... 55
Figure 22: Reference Design of STATUS .................................................................................................. 56
Figure 23: Reference Design of USB_BOOT Interface ............................................................................. 57
Figure 24: Timing of Turning on Module with USB_BOOT ........................................................................ 58
Figure 25: Reference Design of Main Antenna Interface .......................................................................... 66
Figure 26: Microstrip Design on a 2-layer PCB ......................................................................................... 66
Figure 27: Coplanar Waveguide Design on a 2-layer PCB ....................................................................... 67
Figure 28: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) .................... 67
Figure 29: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) .................... 67
Figure 30: Reference Circuit of GNSS Antenna Interface ......................................................................... 69
Figure 31: Dimensions of the U.FL-R-SMT Connector (Unit: mm) ............................................................ 71
Figure 32: Mechanicals of U.FL-LP Connectors ........................................................................................ 71
Figure 33: Space Factor of Mated Connector (Unit: mm) .......................................................................... 72
Figure 34: Module Top and Side Dimensions ............................................................................................ 92
Figure 35: Module Bottom Dimensions (Bottom View) .............................................................................. 93
Figure 36: Recommended Footprint (Top View) ........................................................................................ 94
Figure 37: Top View of the Module ............................................................................................................ 95
Figure 38: Bottom View of the Module ....................................................................................................... 95
Figure 39: Recommended Reflow Soldering Thermal Profile ................................................................... 97
Figure 40: Tape Dimensions ...................................................................................................................... 99
Figure 41: Reel Dimensions ....................................................................................................................... 99