PE4232
Product Specification
Evaluation Kit
The SPST Switch Evaluation Kit board was
designed to ease customer evaluation of the
PE4232 SPST switch. The RF1 port is connected
through a 75
Ω
transmission line to the top left
BNC connector, J1. The RF2 port is connected
through a 75
Ω
transmission line to the BNC
connector on the top right side of the board, J2. A
through transmission line connects BNC
connectors J3 and J4. This transmission line can
be used to estimate the loss of the PCB over the
environmental conditions being evaluated.
The board is constructed of a two metal layer FR4
material with a total thickness of 0.031”. The
bottom layer provides ground for the RF
transmission lines. The transmission lines were
designed using a coplanar waveguide model with
trace width of 0.021”, trace gaps of 0.030”,
dielectric thickness of 0.028”, metal thickness of
0.0021” and
εR
of 4.3. Note that the predominate
mode for these transmission lines is coplanar
waveguide with a ground plane.
J5 provides a means for controlling DC and digital
inputs to the device. Starting from the lower left
pin, the second pin to the right (J5-3) is connected
to the device V
DD
input. The fourth pin to the right
(J5-7) is connected to the device CTRL input. It is
the responsibility of the customer to determine
proper supply decoupling for their design
application. Removing these components from
the evaluation board has not been shown to
degrade RF performance.
Figure 11. Evaluation Board Layouts
Peregrine Specification 101/0079
Figure 12. Evaluation Board Schematic
Peregrine Specification 102/0081
Document No. 70-0054-03
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©2005 Peregrine Semiconductor Corp. All rights reserved.
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