Telit Wireless Solutions SE873 Series, Product User Manual

Page: 7 / 69

SE873 Family Product User Guide Contents
1VV0301216
Rev.4
Page 7 of 69 2018-08-24
Primary Serial Port Configuration 38
Secondary Serial Port Configuration 38
UART Operation 39
I
2
C Operation 40
SPI Operation 40
RF Interface ................................................................................................................ 41
RF Input 41
External Active Antenna Voltage 41
Burnout Protection 41
Jamming Rejection 41
Frequency Plan 41
Local Oscillator Leakage 41
9. RF SIGNALS ................................................................................................................... 42
RF Input ...................................................................................................................... 42
GNSS Antenna Polarization ........................................................................................ 43
Active versus Passive Antenna ................................................................................... 43
GNSS Antenna Gain ................................................................................................... 43
System Noise Floor ..................................................................................................... 44
PCB stack and Trace Impedance ................................................................................ 44
RF Trace Losses ......................................................................................................... 45
Implications of the Pre-Select SAW Filter .................................................................... 45
RF Interference ........................................................................................................... 45
Shielding ..................................................................................................................... 46
Powering an External LNA .......................................................................................... 46
10. REFERENCE DESIGNS .................................................................................................. 47
11. MECHANICAL DRAWING .............................................................................................. 50
12. PCB FOOTPRINT ........................................................................................................... 51
13. PRODUCT PACKAGING AND HANDLING .................................................................... 52
Product Marking and Serialization ............................................................................... 52
Product Label – SE873 Family 52
Product Packaging and Delivery ................................................................................. 53
Moisture Sensitivity ..................................................................................................... 55
ESD Sensitivity ........................................................................................................... 57
Reflow ......................................................................................................................... 57
Assembly Considerations ............................................................................................ 57
Washing Considerations ............................................................................................. 57
Safety .......................................................................................................................... 57
Disposal ...................................................................................................................... 57
14. ENVIRONMENTAL REQUIREMENTS ............................................................................ 58
Operating Environmental Limits .................................................................................. 58