Quectel BG950A-GL, Руководство пользователя

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LPWA Module Series
BG950A-GL&BG951A-GL_Hardware_Design 10 / 84
Figure Index
Figure 1: Functional Diagram of BG950A-GL ....................................................................................................... 16
Figure 2: Functional Diagram of BG951A-GL ....................................................................................................... 17
Figure 3: Pin Assignment of BG950A-GL & BG951A-GL (Top View) ............................................................... 18
Figure 4: Sleep Mode Application via UART Interface ........................................................................................ 30
Figure 5: Power Supply Limits During Burst Transmission ................................................................................ 32
Figure 6: Star Structure of the Power Supply ....................................................................................................... 32
Figure 7: Turn on the Module with Driving Circuit ................................................................................................ 33
Figure 8: Turn on the Module a Button .................................................................................................................. 34
Figure 9: Power-up Timing ....................................................................................................................................... 34
Figure 10: Power-down Timing (PWRKEY & PON_TRIG
）
.............................................................................. 35
Figure 11: Power-down Timing
（
AT Command & PON_TRIG
）
...................................................................... 36
Figure 12: Reference Circuit of RESET_N with Driving Circuit ......................................................................... 37
Figure 13: Reference Circuit of RESET_N with a Button ................................................................................... 37
Figure 14: Reset Timing ........................................................................................................................................... 37
Figure 15: Reference Circuit of PON_TRIG ......................................................................................................... 38
Figure 16: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector ............................. 41
Figure 17: Reference Circuit of (U)SIM Interface with a 6-Pin (U)SIM Card Connector ............................... 41
Figure 18: Reference Circuit of USB Application ................................................................................................. 43
Figure 19: Main UART Reference Design (Translator Chip) .............................................................................. 46
Figure 20: Main UART Reference Design (Transistor Circuit) ........................................................................... 46
Figure 21: Reference Design of PCM Application with Audio Codec ............................................................... 48
Figure 22: Reference Circuit of the PSM Status Indication ................................................................................ 50
Figure 23: Reference Circuit of Network Status Indication ................................................................................ 51
Figure 24: Reference Circuits of STATUS ............................................................................................................. 51
Figure 25: Reference Circuit of Main Antenna Interface ..................................................................................... 58
Figure 26: Reference Circuit of GNSS Antenna ................................................................................................... 60
Figure 27: Microstrip Design on a 2-layer PCB .................................................................................................... 61
Figure 28: Coplanar Waveguide Design on a 2-layer PCB ................................................................................ 61
Figure 29: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) ....................... 62
Figure 30: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) ....................... 62
Figure 31: Dimensions of the U.FL-R-SMT Connector (Unit: mm) ................................................................... 63
Figure 32: Mechanicals of U.FL-LP Connectors .................................................................................................. 64
Figure 33: Space Factor of Mated Connector (Unit: mm) .................................................................................. 64
Figure 34: Module Top and Side Dimensions (Unit: mm) ................................................................................... 72
Figure 35: Module Bottom Dimensions (Bottom View, Unit: mm) ..................................................................... 73
Figure 36: Recommended Footprint (Top View) .................................................................................................. 74
Figure 37: Top & Bottom Views of BG950A-GL & BG951A-GL ......................................................................... 75
Figure 38: Recommended Reflow Soldering Thermal Profile ........................................................................... 77
Figure 39: Carrier Tape Dimension Drawing ......................................................................................................... 79
Figure 40: Plastic Reel Dimension Drawing ......................................................................................................... 79
Figure 41: Packaging Process ................................................................................................................................ 80