Quectel EG21-G - Page 5

LTE Module Series
EG21-G Hardware Design
EG21-G_Hardware_Design 4 / 100
3.17. Behaviors of RI ..................................................................................................................... 51
3.18. USB_BOOT Interface ............................................................................................................ 51
4 GNSS Receiver ................................................................................................................................ 54
4.1. General Description .............................................................................................................. 54
4.2. GNSS Performance .............................................................................................................. 54
4.3. Layout Guidelines ................................................................................................................. 55
5 Antenna Interfaces .......................................................................................................................... 56
5.1. Main/Rx-diversity Antenna Interfaces .................................................................................... 56
5.1.1. Pin Definition ................................................................................................................ 56
5.1.2. Operating Frequency ................................................................................................... 56
5.1.3. Reference Design of RF Antenna Interface ................................................................. 58
5.1.4. Reference Design of RF Layout ................................................................................... 58
5.2. GNSS Antenna Interface ....................................................................................................... 60
5.3. Antenna Installation .............................................................................................................. 61
5.3.1. Antenna Requirement .................................................................................................. 61
5.3.2. Recommended RF Connector for Antenna Installation ................................................ 62
6 Electrical, Reliability and Radio Characteristics .......................................................................... 65
6.1. Absolute Maximum Ratings .................................................................................................. 65
6.2. Power Supply Ratings ........................................................................................................... 66
6.3. Operation and Storage Temperatures ................................................................................... 66
6.4. Current Consumption ............................................................................................................ 67
6.5. RF Output Power .................................................................................................................. 72
6.6. RF Receiving Sensitivity ....................................................................................................... 72
6.7. Electrostatic Discharge ......................................................................................................... 74
6.8. Thermal Consideration .......................................................................................................... 74
7 Mechanical Dimensions.................................................................................................................. 77
7.1. Mechanical Dimensions of the Module.................................................................................. 77
7.2. Recommended Footprint ....................................................................................................... 79
7.3. Design Effect Drawings of the Module .................................................................................. 80
8 Storage, Manufacturing and Packaging ........................................................................................ 81
8.1. Storage ................................................................................................................................. 81
8.2. Manufacturing and Soldering ................................................................................................ 82
8.3. Packaging ............................................................................................................................. 83
9 Appendix A References .................................................................................................................. 85
10 Appendix B GPRS Coding Schemes ............................................................................................. 89
11 Appendix C GPRS Multi-slot Classes ............................................................................................ 90
12 Appendix D EDGE Modulation and Coding Schemes .................................................................. 92