UBX-G7020 - Hardware Integration Manual
Production
GPS.G7-HW-10003 Objective Specification Page 60 of 74
5 Production
5.1 Packaging, shipping, storage and moisture preconditioning
For information pertaining to reels and tapes, Moisture Sensitivity levels (MSD), shipment and storage
information, as well as drying for preconditioning see the UBX-G7020-Kx Data Sheet [1] and UBX-G7020-CT
Data Sheet [2].
5.2 ESD handling precautions
ESD prevention is based on establishing an Electrostatic Protective Area (EPA). The EPA can be a small working
station or a large manufacturing area. The main principle of an EPA is that there are no highly charging materials
in the vicinity of ESD sensitive electronics, all conductive materials are grounded, workers are grounded, and
charge build-up on ESD sensitive electronics is prevented. International standards are used to define typical EPA
and can be obtained for example from International Electrotechnical Commission (IEC) or American National
Standards Institute (ANSI).
GPS receiver ICs are sensitive to ESD and require special precautions when handling. Particular care must be used
when handling patch antennas, due to the risk of electrostatic charges. In addition to standard ESD safety
practices, the following measures should be taken into account whenever handling the receiver.
Unless there is a galvanic coupling between the local GND (i.e. the
work table) and the PCB GND, then the first point of contact when
handling the PCB shall always be between the local GND and PCB
GND.
When handling the RF-IC or placing components connected to the
RF inputs or outputs, do not come into contact with any charged
capacitors and be careful when contacting materials that can
develop charges (e.g. patch antenna ~10pF, coax cable ~50-
80pF/m, soldering iron, …)
To prevent electrostatic discharge through the RF input, do not
touch any exposed antenna area. If there is any risk that such
exposed antenna area is touched in non ESD protected work area,
implement proper ESD protection measures in the design.
When soldering components, make sure to use an ESD safe
soldering iron (tip).
Failure to observe these precautions can result in severe damage to the GPS/GNSS receiver!
5.3 Soldering
Reflow soldering procedures are described in the IPC/JEDEC J-STD-020 standard.
To Next Page
Loading...
Need help?
General
