NEO-D9C - Integration manual
Figure 26: Minimal NEO-D9C design
It is important to connect V_USB to ground if USB is not used.
UART2 may be used to provide correction data directly to a high precision GNSS receiver
from the u-blox F9 platform. To check whether a specific u-blox F9 product supports
correction data output by the NEO-D9S, refer to its Integration manual.
4.5 EOS/ESD precautions
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 applicable data sheet [
When integrating receivers into wireless systems, pay special attention 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 mechanism is defined by
the applied voltage, whereas bipolar semiconductors are more susceptible to thermal overstress.
The following design guidelines help in designing robust yet cost-effective solutions.
4.5.1 ESD protection measures
receivers are sensitive to Electrostatic Discharge (ESD). Special precautions are required
when handling. Most defects caused by ESD can be prevented by following strict ESD
protection rules for production and handling. When implementing passive antenna patches
or external antenna connection points, then additional ESD measures as shown in the figure
below can also avoid failures in the field.
UBX-21031631 - R02
4 Design
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