Integration Manual

TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R26 Design-in
Page 128 of 162
2.15.2 ESD immunity test of TOBY-L2 and MPCI-L2 series reference designs
Although EMC / ESD certification is required for customized devices integrating TOBY-L2 and MPCI-L2 series
modules for European Conformance CE mark, EMC certification (including ESD immunity) has been successfully
performed on TOBY-L2 and MPCI-L2 series modules reference design according to European Norms summarized
in Table 51.
The EMC / ESD approved u-blox reference designs consist of a TOBY-L2 and MPCI-L2 series module installed onto
a motherboard which provides supply interface, SIM card and communication port. External LTE/3G/2G antennas
are connected to the provided connectors.
Since external antennas are used, the antenna port can be separated from the enclosure port. The reference design
is not enclosed in a box so that the enclosure port is not identified with physical surfaces. Therefore, some test
cases cannot be applied. Only the antenna port is identified as accessible for direct ESD exposure.
Table 52 reports the u-blox TOBY-L2 and MPCI-L2 series reference designs ESD immunity test results, according
to test requirements stated in CENELEC EN 61000-4-2 [18], ETSI EN 301 489-1 [19], ETSI EN 301 489-52 [20].
Category
Application
Immunity Level
Remarks
Contact Discharge
to coupling planes
(indirect contact discharge)
Enclosure
+4 kV / -4 kV
Contact Discharges
to conducted surfaces
(direct contact discharge)
Enclosure port
Not Applicable
Test not applicable to u-blox reference design because it
does not provide enclosure surface.
The test is applicable only to equipment providing
conductive enclosure surface.
Antenna ports
+4 kV / -4 kV
Test applicable to u-blox reference design because it
provides antennas with conductive & insulating surfaces.
The test is applicable only to equipment providing
antennas with conductive surface.
Air Discharge
at insulating surfaces
Enclosure port
Not Applicable
Test not applicable to the u-blox reference design because
it does not provide an enclosure surface.
The test is applicable only to equipment providing
insulating enclosure surface.
Antenna ports
+8 kV / -8 kV
Test applicable to u-blox reference design because it
provides antennas with conductive & insulating surfaces.
The test is applicable only to equipment providing
antennas with insulating surface.
Table 52: Enclosure ESD immunity level of u-blox TOBY-L2 and MPCI-L2 series modules reference designs
TOBY-L2 and MPCI-L2 reference design implement all the ESD precautions described in section 2.15.3.
2.15.3 ESD application circuits
The application circuits described in this section are recommended and should be implemented in the device
integrating TOBY-L2 and MPCI-L2 series modules, according to the application device classification (see ETSI EN
301 489-1 [19]), to satisfy the requirements for ESD immunity test summarized in Table 51.
Antenna interface
The ANT1 and ANT2 ports of TOBY-L2 and MPCI-L2 series modules provide ESD immunity up to ±4 kV for direct
Contact Discharge and up to ±8 kV for Air Discharge: no further precaution to ESD immunity test is needed, as
implemented in the EMC / ESD approved reference design of TOBY-L2 and MPCI-L2 series modules.