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4235-51 Datasheet(PDF) 5 Page - Peregrine Semiconductor Corp. |
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4235-51 Datasheet(HTML) 5 Page - Peregrine Semiconductor Corp. |
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5 / 8 page  Product Specification PE4235 Page 5 of 8 ©2005 Peregrine Semiconductor Corp. All rights reserved. Document No. 70-0069-03 │ www.psemi.com Evaluation Kit The SPDT Switch Evaluation Kit board was designed to ease customer evaluation of the PE4235 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 0.0476”, trace gaps of 0.030”, dielectric thickness of 0.028”, metal thickness of 0.0021” and ε r of 4.4. 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 (J6-3) is connected to the device CTRL input. The fourth pin to the right (J6-7) is connected to the device VDD input. A decoupling capacitor (100 pF) is provided on both CTRL and VDD 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. Figure 12. Evaluation Board Layouts Figure 13. Evaluation Board Schematic Peregrine Specification 102/0108 Peregrine Specification 101/0085 |
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