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MAX2664EWS+ Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX2664EWS+ Datasheet(HTML) 11 Page - Maxim Integrated Products |
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11 / 13 page  VHF/UHF Low-Noise Amplifiers 11 Table 4. MAX2665 Typical Noise Parameters VCC = 2.7V, TA = +25NC, Z0 = 50I Active Bypass Mode Control The devices’ RFOUT/CTRL pin is used to control the bypass mode of the LNA. When set to logic-high through an external 1kI resistor, the devices’ active mode is enabled. Conversely, when connected to logic-low, the devices’ bypass mode is disabled. An external DC-blocking capacitor should be used to isolate the control function of this dual-purpose pin (see the Typical Application Circuit). Applications Information A properly designed PCB is essential to any RF micro- wave circuit. Use controlled-impedance lines on all high-frequency inputs and outputs. Bypass VCC with decoupling capacitors located close to the device. For long VCC lines, it might be necessary to add addi- tional decoupling capacitors. Locate these additional capacitors further away from the device package. Proper grounding of the GND pin is essential. If the PCB uses a topside RF ground, connect it directly to the GND pin. For a board where the ground is not on the component layer, connect the GND pin to the board with multiple vias close to the package. Refer to www.maxim-ic.com for the MAX2664/MAX2665 S-parameter download, MAX2664/MAX2665 EV kit sche- matic, gerbers, PADS layout file, and BOM information. Table 5. Logic Table Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 4 WLP W40A0+1 21-0480 — Chip Information PROCESS: SiGe BiCMOS *rn is normalized. CTRL MODE High Active Low Bypass FREQUENCY (MHz) FMIN (dB) | GOPT | GOPT ANGLE rn* 60 0.911 0.1390 34.5 0.1241 90 0.928 0.1458 47.2 0.1240 120 0.940 0.1592 58.1 0.1237 150 0.949 0.1766 67.0 0.1233 180 0.958 0.1962 74.5 0.1227 210 0.967 0.2170 80.7 0.1221 240 0.975 0.2383 86.2 0.1213 |
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