Specifications

SIM7028 Hardware Design V1.00
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Figure Index
Figure 1: SIM7028 block diagram
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Figure 2: SIM7028 Pin assignment overview..................................................................................................................................12
Figure 3: Dimensions (Unit: mm).......................................................................................................................................................... 16
Figure 4: Footprint recommendation (Unit: mm).................................................................................................................................. 17
Figure 5: Power supply application circuit
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Figure 6:Reference reset circuit........................................................................................................................................................ 19
Figure 7: WAKEUP wakes up the serial communication is abnormal.........................................................................................20
Figure 8: WAKEUP wakes up the serial communication successfully........................................................................................21
Figure 9: WAKEUP recommended circuit
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Figure 10: Connection of serial port with level matching
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Figure 11: The recommended circuit with the translator IC.......................................................................................................... 24
Figure 12: The recommended circuit with MOSFET......................................................................................................................24
Figure 13: RI signal behaviors(SMS, URC).................................................................................................................................... 25
Figure 14: Reference circuit of SIM card interface
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Figure 15: NETLIGHT reference circuit........................................................................................................................................... 27
Figure 16: Power consumption of module in different mode
........................................................................................................ 30
Figure 17: Antenna matching circuit (MAIN_ANT).........................................................................................................................34
Figure 18: RF trace should be isolated from other signal trace................................................................................................... 35
Figure 19: Distance between RF trace and GND
...........................................................................................................................36
Figure 20: Top and bottom view of SIM7028..................................................................................................................................40
Figure 21: The ramp-soak-spike reflow profile of SIM7028
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Figure 22: packaging diagram...........................................................................................................................................................42
Figure 23: Tray drawing......................................................................................................................................................................42
Figure 24: Small carton drawing
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Figure 25: Big carton drawing
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