Quectel EG91 Series Hardware Design page 6

3.12. PCM and I2C Interfaces ........................................................................................................
3.13. SPI Interface .........................................................................................................................
3.14. Network Status Indication .....................................................................................................
3.15. STATUS ................................................................................................................................
3.16. ADC Interface .......................................................................................................................
3.17. Behaviors of RI .....................................................................................................................
3.18. USB_BOOT Interface............................................................................................................
4
GNSS Receiver ................................................................................................................................
4.1. General Description ..............................................................................................................
4.2. GNSS Performance ..............................................................................................................
4.3. Layout Guidelines .................................................................................................................
5
Antenna Interfaces ..........................................................................................................................
5.1. Main/Rx-diversityAntenna Interfaces.....................................................................................
5.1.1. Pin Definition ................................................................................................................
5.1.2. Operating Frequency ...................................................................................................
5.1.3. Reference Design of RF Antenna Interface .................................................................
5.1.4. Reference Design of RF Layout ...................................................................................
5.2. GNSS Antenna Interface .......................................................................................................
5.3. Antenna Installation ..............................................................................................................
5.3.1. Antenna Requirement ..................................................................................................
5.3.2. Recommended RF Connector for Antenna Installation ................................................
6
Electrical, Reliability and RadioCharacteristics ...........................................................................
6.1. Absolute Maximum Ratings ..................................................................................................
6.2. Power Supply Ratings ...........................................................................................................
6.3. Operation and Storage Temperatures ..................................................................................
6.4. Current Consumption ............................................................................................................
6.5. RF Output Power ..................................................................................................................
6.6. RF Receiving Sensitivity .......................................................................................................
6.7. Electrostatic Discharge .........................................................................................................
6.8. Thermal Consideration ..........................................................................................................
7
Mechanical Dimensions..................................................................................................................
7.1. Mechanical Dimensions of the Module..................................................................................
7.2. Recommended Footprint .......................................................................................................
7.3. Design Effect Drawings of the Module ..................................................................................
8
Storage, Manufacturing and Packaging ........................................................................................
8.1. Storage .................................................................................................................................
8.2. Manufacturing and Soldering ................................................................................................
8.3. Packaging .............................................................................................................................
9
Appendix A References ..................................................................................................................
10
Appendix B GPRS Coding Schemes .............................................................................................
EG91_Hardware_Design 5 / 93
LTE Module Series
EG91 Hardware Design
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