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PE64905MLBB-Z Datasheet(PDF) 9 Page - Peregrine Semiconductor Corp. |
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PE64905MLBB-Z Datasheet(HTML) 9 Page - Peregrine Semiconductor Corp. |
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9 / 11 page  Product Specification PE64905 Page 9 of 11 Document No. 70-0335-06 │ www.psemi.com ©2011-2012 Peregrine Semiconductor Corp. All rights reserved. Evaluation Board The 101-0597 Evaluation Board (EVB) was designed for accurate measurement of the DTC impedance and loss. Two configurations are available: 1 Port Shunt (J3) and 2 Port Series (J4, J5). Three calibration standards are provided. The open (J2) and short (J1) standards (104 ps delay) are used for performing port extensions and accounting for electrical length and transmission line loss. The Thru (J9, J10) standard can be used to estimate PCB transmission line losses for scalar de-embedding of the 2 Port Series configuration (J4, J5). The board consists of a 4 layer stack with 2 outer layers made of Rogers 4350B (εr = 3.48) and 2 inner layers of FR4 (εr = 4.80). The total thickness of this board is 62 mils (1.57 mm). The inner layers provide a ground plane for the transmission lines. Each transmission line is designed using a coplanar waveguide with ground plane (CPWG) model using a trace width of 32 mils (0.813 mm), gap of 15 mils (0.381 mm), and a metal thickness of 1.4 mils (0.051 mm). Layout Recommendations For optimal results, place a ground fill directly under the DTC package on the PCB. Layout isolation is desired between all control and RF lines. When using the DTC in a shunt configuration, it is important to make sure the RF- pin is solidly grounded to a filled ground plane. Ground traces should be as short as possible to minimize inductance. A continuous ground plane is preferred on the top layer of the PCB. When multiple DTCs are used together, the physical distance between them should be minimized and the connection should be as wide as possible to minimize series parasitic inductance. Figure 19. Recommended Schematic of Multiple DTCs Figure 20. Recommended Layout of Multiple DTCs Figure 21. Evaluation Board 101-0597 |
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