Product Info

LPWA Module Series
BG95 Hardware Design
BG95_Hardware_Design 8 / 88
Figure Index
Figure 1: Functional Diagram .................................................................................................................. 21
Figure 2: Pin Assignment (Top View) ...................................................................................................... 23
Figure 3: Sleep Mode Application via UART ........................................................................................... 35
Figure 4: Power Supply Limits during Burst Transmission (BG95-M3/-M5) ............................................ 37
Figure 5: Star Structure of the Power Supply .......................................................................................... 38
Figure 6: Turn on the Module Using Driving Circuit ................................................................................. 39
Figure 7: Turn on the Module Using Keystroke ....................................................................................... 39
Figure 8: Power-on Timing ...................................................................................................................... 40
Figure 9: Power-off Timing ...................................................................................................................... 41
Figure 10: Reset Timing .......................................................................................................................... 42
Figure 11: Reference Circuit of RESET_N by Using Driving Circuit ........................................................ 42
Figure 12: Reference Circuit of RESET_N by Using Button .................................................................... 43
Figure 13: Reference Circuit of PON_TRIG ............................................................................................ 44
Figure 14: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector ........................ 45
Figure 15: Reference Circuit of (U)SIM Interface with a 6-Pin (U)SIM Card Connector .......................... 45
Figure 16: Reference Design of USB Interface ....................................................................................... 47
Figure 17: Main UART Reference Design (Translator Chip) ................................................................... 50
Figure 18: Main UART Reference Design (Transistor Circuit) ................................................................. 50
Figure 19: Reference Circuit with Dual-Transistor Circuit (Recommended for GNSS UART) ................. 51
Figure 20: Reference Circuit of PCM Application with Audio Codec ....................................................... 52
Figure 21: Reference Circuit of the Network Status Indicator .................................................................. 53
Figure 22: Reference Design of STATUS ............................................................................................... 54
Figure 23: Reference Design of USB_BOOT Interface ........................................................................... 55
Figure 24: Timing of Turning on Module with USB_BOOT ...................................................................... 56
Figure 25: Reference Design of Main Antenna Interface ......................................................................... 64
Figure 26: Microstrip Design on a 2-layer PCB ....................................................................................... 64
Figure 27: Coplanar Waveguide Design on a 2-layer PCB ..................................................................... 65
Figure 28: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) ................... 65
Figure 29: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) ................... 65
Figure 30: Reference Circuit of GNSS Antenna Interface ....................................................................... 67
Figure 31: Dimensions of the U.FL-R-SMT Connector (Unit: mm) .......................................................... 68
Figure 32: Mechanicals of U.FL-LP Connectors ...................................................................................... 69
Figure 33: Space Factor of Mated Connector (Unit: mm) ........................................................................ 69
Figure 34: Module Top and Side Dimensions ......................................................................................... 79
Figure 35: Module Bottom Dimensions (Bottom View) ............................................................................ 80
Figure 36: Recommended Footprint (Top View)...................................................................................... 81
Figure 37: Top View of the Module .......................................................................................................... 82
Figure 38: Bottom View of the Module .................................................................................................... 82
Figure 39: Recommended Reflow Soldering Thermal Profile .................................................................. 84
Figure 40: Tape Dimensions ................................................................................................................... 85
Figure 41: Reel Dimensions .................................................................................................................... 86