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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD9545 датащи(PDF) 33 Page - Analog Devices |
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AD9545 датащи(HTML) 33 Page - Analog Devices |
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33 / 157 page  Data Sheet AD9545 Rev. A | Page 33 of 157 INPUT/OUTPUT TERMINATION RECOMMENDATIONS SYSTEM CLOCK INPUTS XOA XOB AD9545 25MHz TO 60MHz FUNDAMENTAL AT-CUT CRYSTAL CTUNE CTUNE Figure 23. System Clock Input (XOA/XOB) in Crystal Mode (CTUNE = 2 × (CLOAD − CSTRAY), Where Typical CSTRAY = 2 pF to 5 pF) XOA 330 Ω 150 Ω 0.1µF XOB AD9545 3.3V CMOS TCXO 0.1µF Figure 24. System Clock Input (XOA, XOB) When Using a TCXO/OCXO with 3.3 V CMOS Output REFERENCE CLOCK INPUTS R1 R2 REFx OR REFxx INTERNAL DC THRESHOLD FOR 1.2V OR 1.8V CMOS AD9545 1.8 RECEIVER CMOS DRIVER HI-Z INPUT Figure 25. Single-Ended DC-Coupled Mode, 1.2 V or 1.8 V CMOS RL (OPTIONAL) 0.1µF REFx OR REFxx AD9545 1.8 RECEIVER DRIVER 1.2V 47k Ω 47k Ω 0.6V Figure 26. Single-Ended AC-Coupled Interface Mode REFx OR REFxx AD9545 DRIVER 1.2V 47k Ω 0.6V Figure 27. Single-Ended Internal Pull-Up Resistor Mode REFx LVDS DRIVER (1.2V COMMON-MODE) REFxx AD9545 100 Ω 20µA 20µA 20µA 20µA 1.2V 30k Ω 30k Ω LEVEL SHIFT Figure 28. Differential LVDS Input Mode REFx DIFFERENTIAL DRIVER REFxx AD9545 RL 47k Ω 47k Ω 0.6V 0.1µF 0.1µF 1.2V 0.6V 47k Ω 47k Ω Figure 29. Differential AC-Coupled Mode (RL = 100 Ω Is Recommended, Except For HCSL) REFx DIFFERENTIAL DRIVER (0.6V COMMON-MODE) REFxx AD9545 RL Figure 30. Differential DC-Coupled Mode |
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