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4270 Datasheet(PDF) 5 Page - Integrated Circuit Systems |
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4270 Datasheet(HTML) 5 Page - Integrated Circuit Systems |
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5 / 8 page  Product Specification PE4270 Page 5 of 8 ©2005 Peregrine Semiconductor Corp. All rights reserved. Document No. 70-0148-03 │ www.psemi.com Evaluation Kit The PE4270 EK board was designed to ease customer evaluation of Peregrine’s high performance SPST CATV MOSFET switch. RF1 is connected through a 75 Ω transmission line via the top left F connector, J1. RF2 is connected through a 75 Ω transmission line via the top right F connector, J2. A 75 Ω through transmission line is available via F connectors J3 and J4. This transmission line can be used to estimate the loss of the PCB over the environmental conditions being evaluated. VDD is supplied via J6-2, while the control logic voltage is supplied via J5-2. It is the responsibility of the customer to determine proper supply decoupling for their design application. It has been observed that by removing C1 and C2 from the evaluation board has not shown to degrade RF performance. 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 ε r of 4.6. Note that the predominate mode for these transmission lines is coplanar waveguide with a ground plane. Figure 11. Evaluation Board Layouts Figure 12. Evaluation Board Schematic Peregrine Specification 102/0224 Peregrine Specification 101/0167 (with F connectors) |
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