Product Info

Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design 4 / 130
3.20.2. Front Camera Interface .................................................................................................. 61
3.20.3. Design Considerations ................................................................................................... 63
3.21. Sensor Interfaces..................................................................................................................... 64
3.22. Audio Interfaces ....................................................................................................................... 65
3.22.1. Reference Circuit Design for Microphone Interfaces ..................................................... 66
3.22.2. Reference Circuit Design for Receiver Interface ........................................................... 66
3.22.3. Reference Circuit Design for Headphone Interface ....................................................... 67
3.22.4. Reference Circuit Design for Loudspeaker Interface..................................................... 67
3.22.5. Audio Interfaces Design Considerations........................................................................ 67
3.23. Emergency Download Interface .............................................................................................. 68
4 Wi-Fi and BT ....................................................................................................................................... 69
4.1. Wi-Fi Overview ........................................................................................................................ 69
4.1.1. Wi-Fi Performance ......................................................................................................... 69
4.2. BT Overview ............................................................................................................................ 70
5 GNSS ................................................................................................................................................... 72
5.1. GNSS Performance ................................................................................................................. 72
5.2. GNSS RF Design Guidelines .................................................................................................. 72
6 Antenna Interfaces ............................................................................................................................. 74
6.1. Main/Rx-diversity Antenna Interfaces ...................................................................................... 74
6.1.1. Operating Frequency ..................................................................................................... 74
6.1.2. Main and Rx-diversity Antenna Interfaces Reference Design ....................................... 78
6.1.3. Reference Design of RF Layout..................................................................................... 78
6.2. Wi-Fi/BT Antenna Interface ..................................................................................................... 80
6.3. GNSS Antenna Interface ......................................................................................................... 81
6.3.1. Recommended Circuit for Passive Antenna .................................................................. 82
6.3.2. Recommended Circuit for Active Antenna ..................................................................... 82
6.4. Antenna Installation ................................................................................................................. 83
6.4.1. Antenna Requirements .................................................................................................. 83
6.4.2. Recommended RF Connector for Antenna Installation ................................................. 84
7 Electrical, Reliability and Radio Characteristics ............................................................................ 86
7.1. Absolute Maximum Ratings ..................................................................................................... 86
7.2. Power Supply Ratings ............................................................................................................. 86
7.3. Charging Performance Specifications ..................................................................................... 87
7.4. Operation and Storage Temperatures ..................................................................................... 88
7.5. Current Consumption .............................................................................................................. 88
7.6. RF Output Power ................................................................................................................... 103
7.7. RF Receiving Sensitivity ........................................................................................................ 105
7.8. Electrostatic Discharge .......................................................................................................... 108
8 Mechanical Dimensions .................................................................................................................. 110
8.1. Mechanical Dimensions of the Module.................................................................................. 110
8.2. Recommended Footprint ....................................................................................................... 112
8.3. Top and Bottom Views of the Module .................................................................................... 113