Product Info

Smart LTE Module Series
SC650T Hardware Design
SC650T_Hardware_Design 4 / 131
3.21.2. Flashlight Interfaces ..................................................................................................... 73
3.22. Sensor Interfaces ................................................................................................................... 74
3.23. Audio Interfaces ..................................................................................................................... 74
3.23.1. Reference Circuit Design for Microphone Interfaces ................................................... 76
3.23.2. Reference Circuit Design for Earpiece Interface .......................................................... 77
3.23.3. Reference Circuit Design for Headphone Interface ..................................................... 78
3.23.4. Reference Circuit Design for Loudspeaker Interface ................................................... 78
3.23.5. Audio Interfaces Design Considerations ...................................................................... 78
3.24. Emergency Download Interface ............................................................................................. 79
3.25. LED Driver Interfaces ............................................................................................................. 79
4 Wi-Fi and BT .................................................................................................................................... 81
4.1. Wi-Fi Overview ....................................................................................................................... 81
4.1.1. Wi-Fi Performance ....................................................................................................... 81
4.2. BT Overview ........................................................................................................................... 83
4.2.1. BT Performance ........................................................................................................... 84
5 GNSS ................................................................................................................................................ 85
5.1. GNSS Performance ................................................................................................................ 85
5.2. GNSS RF Design Guidelines ................................................................................................. 86
6 Antenna Interfaces .......................................................................................................................... 87
6.1. Main/Rx-diversity Antenna Interfaces ..................................................................................... 87
6.1.1. Main and Rx-diversity Antenna Interfaces Reference Design ...................................... 88
6.1.2. Reference Design of RF Layout ................................................................................... 89
6.2. Wi-Fi/BT Antenna Interface .................................................................................................... 91
6.3. GNSS Antenna Interface ........................................................................................................ 91
6.3.1. Recommended Circuit for Passive Antenna ................................................................ 92
6.3.2. Recommended Circuit for Active Antenna ................................................................... 92
6.4. Antenna Installation ................................................................................................................ 93
6.4.1. Antenna Requirements ................................................................................................ 93
6.4.2. Recommended RF Connector for Antenna Installation ................................................ 94
7 Electrical, Reliability and Radio Characteristics .......................................................................... 96
7.1. Absolute Maximum Ratings .................................................................................................... 96
7.2. Power Supply Ratings ............................................................................................................ 96
7.3. Operation and Storage Temperatures ..................................................................................... 97
7.4. Current Consumption ............................................................................................................. 97
7.5. RF Output Power .................................................................................................................... 99
7.6. RF Receiving Sensitivity ....................................................................................................... 100
7.7. Electrostatic Discharge ......................................................................................................... 101
8 Mechanical Dimensions................................................................................................................ 102
8.1. Mechanical Dimensions of the Module ................................................................................. 102
8.2. Recommended Footprint ...................................................................................................... 104
8.3. Top and Bottom View of the Module ..................................................................................... 105