Quectel EC21 Series Hardware Design
Also see for EC21 Series: Command manualHardware design
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Contents
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LTE Module SeriesEC21 Hardware DesignEC21_Hardware_Design Confidential / Released 5 / 943.15. STATUS ................................................................................................................................ 503.16. Behavior of the RI ................................................................................................................. 513.17. SGMII Interface ..................................................................................................................... 513.18. Wireless Connectivity Interfaces ........................................................................................... 543.18.1. WLAN Interface ........................................................................................................... 563.18.2. BT Interface* ................................................................................................................ 563.19. USB_BOOT Interface............................................................................................................ 574 GNSS Receiver ................................................................................................................................ 584.1. General Description .............................................................................................................. 584.2. GNSS Performance .............................................................................................................. 584.3. Layout Guidelines ................................................................................................................. 595 Antenna Interfaces .......................................................................................................................... 605.1. Main/Rx-diversity Antenna Interface ..................................................................................... 605.1.1. Pin Definition................................................................................................................ 605.1.2. Operating Frequency ................................................................................................... 605.1.3. Reference Design of RF Antenna Interface ................................................................. 615.1.4. Reference Design of RF Layout................................................................................... 625.2. GNSS Antenna Interface ....................................................................................................... 645.3. Antenna Installation .............................................................................................................. 655.3.1. Antenna Requirement .................................................................................................. 655.3.2. Recommended RF Connector for Antenna Installation ................................................ 666 Electrical, Reliability and Radio Characteristics .......................................................................... 686.1. Absolute Maximum Ratings .................................................................................................. 686.2. Power Supply Ratings ........................................................................................................... 686.3. Operating Temperature ......................................................................................................... 696.4. Current Consumption ............................................................................................................ 706.5. RF Output Power .................................................................................................................. 766.6. RF Receiving Sensitivity ....................................................................................................... 766.7. Electrostatic Discharge ......................................................................................................... 807 Mechanical Dimensions.................................................................................................................. 817.1. Mechanical Dimensions of the Module.................................................................................. 817.2. Recommended Footprint....................................................................................................... 837.3. Design Effect Drawings of the Module .................................................................................. 848 Storage, Manufacturing and Packaging ........................................................................................ 858.1. Storage ................................................................................................................................. 858.2. Manufacturing and Soldering ................................................................................................ 868.3. Packaging ............................................................................................................................. 879 Appendix A References .................................................................................................................. 8810 Appendix B GPRS Coding Schemes ............................................................................................. 9211 Appendix C GPRS Multi-slot Classes ............................................................................................ 9312 Appendix D EDGE Modulation and Coding Schemes .................................................................. 94QuectelConfidential |
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