Ublox TOBY-L2 series, System Integration Manual

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TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28 Design-in Page 124 of 164
Beside the reduction of the Module-to-Ambient thermal resistance implemented by proper
application hardware design, the increase of module temperature can be moderated by proper
application software implementation:
 Enable power saving configuration using the AT+UPSV command (see section 1.15.16 ).
 Enable module connected-mode for a given time period and then disable it for a time period enough
long to properly mitigate temperature increase.
2.15 ESD guidelines
The sections 2.15.1 and 2.15.2 are related to EMC / ESD immunity. The modules are ESD sensitive
devices. The ESD sensitivity for each pin (as Human Body Model according to JESD22-A114F) is
specified in TOBY-L2 series Data Sheet
[1] or MPCI-L2 series Data Sheet [2] . Special precautions are
required when handling the pins; for ESD handling guidelines see section 3.2 .
2.15.1 ESD immunity test overview
The immunity of devices integrating TOBY-L2 and MPCI-L2 series modules to Electro-Static
Discharge (ESD) is part of the Electro-Magnetic Compatibility (EMC) conformity which is required for
products bearing the CE marking, compliant with the Radio Equipment Directive (2014/53/EU), the
EMC Directive (2014/30/EU) and the Low Voltage Directive (2014/35/EU) issued by the Commission of
the European Community.
Compliance with these directives implies conformity to the following European Norms for device ESD
immunity: ESD testing standard CENELEC EN 61000-4-2
[18] and the radio equipment standards
ETSI EN 301 489-1 [19] , ETSI EN 301 489-52 [20] , which requirements are summarized in Table 45 .
The ESD immunity test is performed at the enclosure port, defined by ETSI EN 301 489-1 [19] as the
physical boundary through which the electromagnetic field radiates. If the device implements an
integral antenna, the enclosure port is seen as all insulating and conductive surfaces housing the
device. If the device implements a removable antenna, the antenna port can be separated from the
enclosure port. The antenna port includes the antenna element and its interconnecting cable
surfaces.
The applicability of ESD immunity test to the whole device depends on the device classification as
defined by ETSI EN 301 489-1
[19] . Applicability of ESD immunity test to the relative device ports or
the relative interconnecting cables to auxiliary equipment, depends on device accessible interfaces
and manufacturer requirements, as defined by ETSI EN 301 489-1
[19] .
Contact discharges are performed at conductive surfaces, while air discharges are performed at
insulating surfaces. Indirect contact discharges are performed on the measurement setup horizontal
and vertical coupling planes as defined in CENELEC EN 61000-4-2
[18] .
☞
For the definition of integral antenna, removable antenna, antenna port and device classification
see ETSI EN 301 489-1
[19] . For contact / air discharges definition see CENELEC EN 61000-4-2 [18] .
Application Category Immunity Level
All exposed surfaces of the radio equipment and ancillary
equipment in a representative configuration Contact Discharge 4 kV
Air Discharge 8 kV
Table 45: EMC / ESD immunity requirements as defined by EN 61000-4-2 and EN 301 489-1, EN 301 489-52