ZOE-M8 series - Hardware Integration Manual
UBX-16030136 - R07 Production Information Design-in
Page 20 of 32
2.12.2 Paste mask
The paste mask shall be same as the copper pads with a paste thickness of 80 µm.
These are recommendations only and not specifications. The exact geometry, distances, stencil thicknesses
and solder paste volumes must be adapted to the specific production processes (e.g. soldering etc.) of the
customer.
2.12.3 Placement
A very important factor in achieving maximum GNSS performance is the placement of the receiver on the PCB.
The connection to the antenna must be as short as possible to avoid jamming into the very sensitive RF section.
Make sure that RF critical circuits are clearly separated from any other digital circuits on the system board. To
achieve this, position the receiver digital part towards your digital section of the system PCB. Care must also be
exercised with placing the receiver in proximity to circuitry that can emit heat. The RF part of the receiver is very
sensitive to temperature and sudden changes can have an adverse impact on performance.
High temperature drift and air vents can affect the GNSS performance. For best performance, avoid high
temperature drift and air vents near the SiP.
2.13 EOS/ESD/EMI precautions
When integrating GNSS receivers into wireless systems, careful consideration must be given to electromagnetic
and voltage susceptibility issues. Wireless systems include components which can produce Electrostatic Discharge
(ESD), Electrical Overstress (EOS) and Electro-Magnetic Interference (EMI). CMOS devices are more sensitive to such
influences because their failure mechanisms are defined by the applied voltage, whereas bipolar semiconductors
are more susceptible to thermal overstress. The following design guidelines are provided to help in designing
robust yet cost effective solutions.
To avoid overstress damage during production or in the field, it is essential to observe strict EOS/ESD/EMI
handling and protection measures.
To prevent overstress damage at the RF_IN of your receiver, never exceed the maximum input power as
specified in the ZOE-M8 Data Sheet [1].
2.13.1 Electrostatic Discharge (ESD)
Electrostatic discharge (ESD) is the sudden and momentary electric current that flows between two
objects at different electrical potentials caused by direct contact or induced by an electrostatic field.
The term is usually used in the electronics and other industries to describe momentary unwanted
currents that may cause damage to electronic equipment.
To Next Page
Loading...
Need help?
General
