Integration Guide

LEON-G100/G200 - System Integration Manual
GSM.G1-HW-09002-F3 Preliminary Design-In
Page 89 of 101
ANT port ESD rating is 4 kV (contact discharge according to IEC 61000-4-2). A higher protection level is required
if the line is externally accessible on the application board.
A higher protection level can be achieved with an external high pass filter, consists of a series 15 pF capacitor
(e.g. Murata GRM1555C1H150JA01) and a shunt 39 nH coil (e.g. Murata LQG15HN39NJ102) connected to the
ANT port.
Note that antenna detection functionality will be not provided implementing this high pass filter for ESD
protection on the ANT port.
External Antenna EnclosureApplication Board
LEON-G100/G200
ANT
Radiating
Element
Zo=50 Ohm
Coaxial Antenna Cable
Enclosure Port
Figure 55: Antenna high pass filter circuit for ESD protection and external antenna
2.5.3 Module Interfaces Precautions
Any module pins that are externally accessible, should be included in the ESD immunity test since they are
considered to be a port [10]. Depending on applicability, and in order to satisfy ESD immunity test requirements
and ESD category level, pins connected to the port should be protected up to +4 kV / -4 kV for direct Contact
Discharge, and up to +8 kV / -8 kV for Air Discharge applied to the enclosure.
The maximum ESD rating of all the pins of the module, except the ANT pin, is 1 kV (HBM according MIL-Std
883D, method 3015.7, EOS/ESD Standard S5.1-1993). A higher protection level can be achieved by mounting an
ESD protection (e.g. EPCOS CA05P4S14THSG varistor array).