User's Manual

Cinterion
®
ELS31-VA/ELS51-VA Hardware Interface Description
Contents
106
 ELS31-VA_ELS51-VA_HID_v01.000 2017-01-04
Confidential / Preliminary
Page 4 of 106
3 Operating Characteristics ........................................................................................57
3.1 Operating Modes ............................................................................................. 57
3.2 Power Up/Power Down Scenarios................................................................... 58
3.2.1 Turn on ELS31-VA/ELS51-VA ............................................................ 58
3.2.1.1 Connecting ELS31-VA/ELS51-VA BATT Lines.................... 58
3.2.1.2 Switch on ELS31-VA/ELS51-VA Using ON Signal .............. 59
3.2.2 Restart ELS31-VA/ELS51-VA............................................................. 60
3.2.2.1 Restart ELS31-VA/ELS51-VA via AT+CFUN Command ..... 60
3.2.2.2 Restart ELS31-VA/ELS51-VA Using EMERG_RST ............ 60
3.2.3 Signal States after First Startup .......................................................... 62
3.2.4 Turn off ELS31-VA/ELS51-VA ............................................................ 63
3.2.4.1 Switch off ELS31-VA/ELS51-VA Using AT Command ......... 63
3.2.5 Automatic Shutdown ........................................................................... 64
3.2.5.1 Thermal Shutdown .............................................................. 64
3.2.5.2 Undervoltage Shutdown...................................................... 65
3.2.5.3 Overvoltage Shutdown........................................................ 65
3.3 Power Saving................................................................................................... 66
3.3.1 Power Saving while Attached to LTE Networks.................................. 66
3.3.2 Wake-up via RTS0/RTS1.................................................................... 67
3.4 Power Supply................................................................................................... 68
3.4.1 Power Supply Ratings......................................................................... 69
3.4.2 Minimizing Power Losses ................................................................... 70
3.4.3 Measuring the Supply Voltage (BATT_BB)......................................... 70
3.4.4 Monitoring Power Supply by AT Command ........................................ 70
3.5 Operating Temperatures.................................................................................. 71
3.6 Electrostatic Discharge .................................................................................... 72
3.6.1 ESD Protection for Antenna Interface................................................. 72
3.7 Blocking against RF on Interface Lines ........................................................... 73
3.8 Reliability Characteristics................................................................................. 76
4 Mechanical Dimensions, Mounting and Packaging...............................................77
4.1 Mechanical Dimensions of ELS31-VA/ELS51-VA ........................................... 77
4.2 Mounting ELS31-VA/ELS51-VA onto the Application Platform........................ 79
4.2.1 SMT PCB Assembly ........................................................................... 79
4.2.1.1 Land Pattern and Stencil..................................................... 79
4.2.1.2 Board Level Characterization.............................................. 81
4.2.2 Moisture Sensitivity Level ................................................................... 81
4.2.3 Soldering Conditions and Temperature .............................................. 82
4.2.3.1 Reflow Profile ...................................................................... 82
4.2.3.2 Maximum Temperature and Duration.................................. 83
4.2.4 Durability and Mechanical Handling.................................................... 84
4.2.4.1 Storage Conditions.............................................................. 84
4.2.4.2 Processing Life.................................................................... 85
4.2.4.3 Baking ................................................................................. 85
4.2.4.4 Electrostatic Discharge ....................................................... 85