Product Specification

PE9354

Page 5 of 7

Document No. 70-0099-02

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©2004-2006 Peregrine Semiconductor Corp. All rights reserved.

Evaluation Kit Information

Evaluation Kit

The SPDT Switch Evaluation Kit board was designed to

ease customer evaluation of the PE9354 SPDT switch.

The RF common port is connected through a 50

Ω

transmission line to the top left SMA connector, J1.

Port 1 and Port 2 are connected through 50

Ω

transmission lines to the top two SMA connectors on

the right side of the board, J2 and J3. A through

transmission line connects SMA connectors J4 and J5.

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 with ground plane model using a trace width

of 0.030”, trace gaps of 0.007”, dielectric thickness of

0.028”, metal thickness of 0.0014” and

ε

J6 provides a means for controlling DC and digital

inputs to the device. Starting from the lower left pin,

the second pin to the right (J2-3) is connected to the

device CNTL input. The fourth pin to the right (J2-7) is

traces. 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.

The ground plane has been removed from beneath the

device for performance issues. It was found that

insertion loss dips (suck-outs) were experienced due to

the capacitive effect of the metal package sitting

insulated by the solder-mask on the ground plane. All

Figure

13. Evaluation Board Schematic

Figure

12. Evaluation Board Layouts

Peregrine specification 102/0129

data specified and shown on this datasheet was taken

using this evaluation board configuration. For optimal

performance, the package may be soldered directly to

the ground plane, but the reliability issues associated

with this mounting must be addressed by the customer.