LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design 7 / 130
3.13.
SD Card Interface ................................................................................................................. 56
3.14.
Wireless Connectivity Interfaces ........................................................................................... 58
3.14.1.
WLAN Interface ........................................................................................................... 61
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 ................................................................................................................................ 66
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
