LPWA Module Series
BG95 Hardware Design
BG95_Hardware_Design 7 / 80
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 18
FIGURE 2: PIN ASSIGNMENT (TOP VIEW) .................................................................................................... 21
FIGURE 3: SLEEP MODE APPLICATION VIA UART ...................................................................................... 33
FIGURE 4: POWER SUPPLY LIMITS DURING BURST TRANSMISSION ..................................................... 34
FIGURE 5: STAR STRUCTURE OF THE POWER SUPPLY ........................................................................... 35
FIGURE 6: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 36
FIGURE 7: TURN ON THE MODULE USING KEYSTROKE ........................................................................... 36
FIGURE 8: TIMING OF TURNING ON MODULE ............................................................................................. 37
FIGURE 9: TIMING OF TURNING OFF MODULE ........................................................................................... 38
FIGURE 10: TIMING OF RESET MODULE ...................................................................................................... 39
FIGURE 11: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 39
FIGURE 12: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 39
FIGURE 13: REFERENCE CIRCUIT OF (U)SIM INTERFACE WITH AN 8-PIN (U)SIM CARD CONNECTOR
................................................................................................................................................................... 41
FIGURE 14: REFERENCE CIRCUIT OF (U)SIM INTERFACE WITH A 6-PIN (U)SIM CARD CONNECTOR 41
FIGURE 15: REFERENCE CIRCUIT OF USB INTERFACE ............................................................................ 43
FIGURE 16: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 46
FIGURE 17: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 46
FIGURE 18: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC ................................... 47
FIGURE 19: REFERENCE CIRCUIT OF THE NETWORK STATUS INDICATOR .......................................... 48
FIGURE 20: REFERENCE CIRCUIT OF STATUS ........................................................................................... 49
FIGURE 21: REFERENCE CIRCUIT OF USB_BOOT INTERFACE ................................................................ 51
FIGURE 22: REFERENCE CIRCUIT OF RF ANTENNA INTERFACE ............................................................ 58
FIGURE 23: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ..................................................................... 58
FIGURE 24: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB ................................................. 59
FIGURE 25: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND) .................................................................................................................................................. 59
FIGURE 26: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE
GROUND) .................................................................................................................................................. 59
FIGURE 27: REFERENCE CIRCUIT OF GNSS ANTENNA INTERFACE ....................................................... 61
FIGURE 28: DIMENSIONS OF THE U.FL-R-SMT CONNECTOR (UNIT: MM) ............................................... 62
FIGURE 29: MECHANICALS OF U.FL-LP CONNECTORS ............................................................................. 63
FIGURE 30: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) .......................................................... 63
FIGURE 31: MODULE TOP AND SIDE DIMENSIONS .................................................................................... 69
FIGURE 32: MODULE BOTTOM DIMENSIONS (BOTTOM VIEW) ................................................................. 70
FIGURE 33: RECOMMENDED FOOTPRINT (TOP VIEW) .............................................................................. 71
FIGURE 34: TOP VIEW OF THE MODULE ...................................................................................................... 72
FIGURE 35: BOTTOM VIEW OF THE MODULE .............................................................................................. 72
FIGURE 36: RECOMMENDED REFLOW SOLDERING THERMAL PROFILE ............................................... 74
FIGURE 37: TAPE DIMENSIONS ..................................................................................................................... 75
FIGURE 38: REEL DIMENSIONS ..................................................................................................................... 76
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