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AD9547BCPZ Fiches technique(PDF) 8 Page - Analog Devices |
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AD9547BCPZ Fiches technique(HTML) 8 Page - Analog Devices |
8 / 104 page AD9547 Rev. 0 | Page 8 of 104 REFERENCE SWITCHOVER SPECIFICATIONS Table 10. Parameter Min Typ Max Unit Test Conditions/Comments MAXIMUM OUTPUT PHASE PERTURBATION (PHASE BUILD-OUT SWITCHOVER) 40 200 ps Assumes a jitter-free reference; satisfies Telcordia GR-1244-CORE requirements MAXIMUM TIME/TIME SLOPE (HITLESS SWITCHOVER) 315 65,535 ns/sec Minimum/maximum values are program- mable upper bounds; a minimum value ensures <10% error; satisfies Telcordia GR-1244-CORE requirements TIME REQUIRED TO SWITCH TO A NEW REFERENCE Hitless Switchover 5 NPDP NPDP = nominal phase detector period (NPDP = fREF/R)1 Phase Build-Out Switchover 3 NPDP NPDP = nominal phase detector period (NPDP = fREF/R)1 1 fREF is the frequency of the active reference; R is the frequency division factor determined by the R divider. DISTRIBUTION CLOCK OUTPUTS (OUT0, OUT1) Table 11. Parameter Min Typ Max Unit Test Conditions/Comments LVPECL MODE Using internal current setting resistor (nominal 3.12 kΩ) Maximum Output Frequency 725 MHz Rise/Fall Time1 (20% to 80%) 180 315 ps 100 Ω termination across output pins Duty Cycle 45 55 % Differential Output Voltage Swing 630 770 910 mV Magnitude of voltage across pins; output driver static Common-Mode Output Voltage AVDD3 − 1.5 AVDD3 − 1.3 AVDD3 − 1.05 V Output driver static LVDS MODE Using internal current setting resistor (nominal 3.12 kΩ) Maximum Output Frequency 725 MHz Rise/Fall Time1 (20% to 80%) 200 350 ps 100 Ω termination across the output pins Duty Cycle 40 60 % Differential Output Voltage Swing Balanced (VOD) 247 454 mV Voltage swing between output pins; output driver static Unbalanced (ΔVOD) 50 mV Absolute difference between voltage swing of normal pin and inverted pin; output driver static Offset Voltage Common Mode (VOS) 1.125 1.375 V Output driver static Common-Mode Difference (ΔVOS) 50 mV Voltage difference between pins; output driver static Short-Circuit Output Current 13 24 mA Output driver static CMOS MODE Weak drive option not supported for operating the CMOS drivers using a 1.8 V supply Maximum Output Frequency 3.3 V Supply 10 pF load Strong Drive Strength Setting 250 MHz Weak Drive Strength Setting 25 MHz 1.8 V Supply 150 MHz |
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