General Guidelines - Lantronix CoBox-Micro User Manual

Integration Guidelines
Frequency
MHz
450.01

General Guidelines

This section covers the following topics:
!
power supply
! network connector
!
virtual ground
! serial signals
! emission improvements
!
CoBox-Mini
! CoBox-Mini100
!
CoBox-Micro
Power Supply
The CoBox-Mini, CoBox-Mini100, and CoBox-Micro run at 5 VDC nominal,
current consumption varies for the different products and depends upon their operating
conditions. Refer to the current requirements listed in the product specification in order to
design an appropriate power supply.
To maintain the necessary voltage, provide ground to the appropriate connector header with
a low inductance and low DC resistance path. The best solution is a solid ground plane.
Place a de-coupling capacitor pair as close as possible to the connector headers of the
board's power supply. We recommend a ceramic (X7R material or equivalent, value
0,022uF to 0,1uF) and a low DC resistance (electrolytic or tantalum value 10uF to 100uF)
capacitor.
Network Connector
If you want to add an RJ45 connector, we recommend that it be at least partially shielded
in case it will be used in a noisy environment. (Please refer to the product specific section.)
Table 10-3: CoBox-Mini100, cont.
Field Strength
Level at 3 m
dBµV/m
37.69
Limit FCC
Class B
dBµV/m
46.00
Test Environment
DELTA
dB
-8.31
Remarks
±
5%. The
10-5