ANNA-B112 - System integration manual
UBX-18009821 - R09
Design-in
Page 47 of 66
C1-Public
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Power planes should keep a distance from the PCB edge sufficient to route a ground ring around
the PCB, the ground ring must then be connected to other layers through vias.
Module footprint and paste mask
The mechanical outline of the ANNA-B112 series module can be found in the ANNA-B112 series data
sheet [2]. The Proposed land pattern layout reflects the pads’ layout of the module.
The Non Solder Mask Defined (NSMD) pad type is recommended over the Solder Mask Defined (SMD),
which implements the solder mask opening 50
μ
m larger per side than the corresponding copper pad.
The suggested paste mask layout for the ANNA-B1 should follow the copper mask layout, as
described in ANNA-B1 series data sheet [2].
⚠
These are recommendations only and not specifications. The exact mask geometries, distances,
and stencil thicknesses must be adapted to the specific production processes of the customer.
Thermal guidelines
ANNA-B112 has been successfully tested in -40 °C to +85 °C. The ANNA-B112 module is a low power
device and will generate only a small amount of heat during operation. A good grounding should still
be observed for temperature relief during high ambient temperature.
ESD guidelines
The immunity of devices integrating ANNA-B112 module 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 R&TTE Directive (99/5/EC), the EMC Directive (89/336/EEC) and the Low
Voltage Directive (73/23/EEC) 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 and the radio equipment standards ETSI
EN 301 489-1, ETSI EN 301 489-7, ETSI EN 301 489-24, the requirements of which are summarized
in Table 15.
The ESD immunity test is performed at the enclosure port, defined by
ETSI EN 301 489-1 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. Applicability of ESD immunity test to the related device ports or the
related interconnecting cables to auxiliary equipment, depends on device accessible interfaces and
manufacturer requirements, as defined by
ETSI EN 301 489-1.
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.
☞
For the definition of integral antenna, removable antenna, antenna port, device classification refer
to the
ETSI EN 301 489-1. For the contact and air discharges definitions refer to CENELEC EN
61000-4-2.
