Users Manual
LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design
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3.14.1. WLAN Interface.......................................................................................................................... 60
3.14.2. BT Interface*............................................................................................................................... 61
3.15. ADC Interfaces...................................................................................................................................... 61
3.16. SGMII Interface..................................................................................................................................... 62
3.17. Network Status Indication....................................................................................................................64
3.18. STATUS................................................................................................................................................. 65
3.19. Behaviors of RI......................................................................................................................................66
3.20. USB_BOOT Interface.......................................................................................................................... 67
4 GNSS Receiver..................................................................................................................................................69
4.1. General Description..............................................................................................................................69
4.2. GNSS Performance..............................................................................................................................69
4.3. Layout Guidelines................................................................................................................................. 70
5 Antenna Interfaces...........................................................................................................................................71
5.1. Main/Rx-diversity Antenna Interfaces............................................................................................... 71
5.1.1. Pin Definition............................................................................................................................... 71
5.1.2. Operating Frequency................................................................................................................. 71
5.1.3. Reference Design of RF Antenna Interface.......................................................................... 73
5.1.4. Reference Design of RF Layout.............................................................................................. 73
5.2. GNSS Antenna Interface.....................................................................................................................75
5.3. Antenna Installation..............................................................................................................................77
5.3.1. Antenna Requirement................................................................................................................77
5.3.2. Recommended RF Connector for Antenna Installation.......................................................78
6 Electrical, Reliability and Radio Characteristics.....................................................................................80
6.1. Absolute Maximum Ratings................................................................................................................ 80
6.2. Power Supply Ratings..........................................................................................................................81
6.3. Operation and Storage Temperatures.............................................................................................. 81
6.4. Current Consumption...........................................................................................................................82
6.5. RF Output Power................................................................................................................................104
6.6. RF Receiving Sensitivity....................................................................................................................105
6.7. Electrostatic Discharge......................................................................................................................113
6.8. Thermal Consideration...................................................................................................................... 113
7 Mechanical Dimensions............................................................................................................................... 116
7.1. Mechanical Dimensions of the Module...........................................................................................116
7.2. Recommended Footprint...................................................................................................................118
7.3. Design Effect Drawings of the Module............................................................................................119
8 Storage, Manufacturing and Packaging.................................................................................................. 120
8.1. Storage................................................................................................................................................. 120
8.2. Manufacturing and Soldering........................................................................................................... 121
8.3. Packaging............................................................................................................................................ 122
9 Appendix A References............................................................................................................................... 124
10 Appendix B GPRS Coding Schemes........................................................................................................ 128