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AD9557/PCBZ 数据表(PDF) 21 Page - Analog Devices |
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AD9557/PCBZ 数据表(HTML) 21 Page - Analog Devices |
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21 / 92 page ![]() Data Sheet AD9557 Rev. A | Page 21 of 92 –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 1k 10 100 10k 100k 1M 10M 100M FREQUENCY OFFSET (Hz) INTEGRATED RMS JITTER (12kHz TO 20MHz): 391fs Figure 13. Absolute Phase Noise (Output Driver = 3.3 V CMOS), fR = 19.44 MHz, fO =161.1328125 MHz, DPLL Loop BW = 0.1 Hz, fSYS = 19.2 MHz TCXO –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 1k 10 100 10k 100k 1M 10M 100M FREQUENCY OFFSET (Hz) INTEGRATED RMS JITTER (12kHz TO 20MHz): 395fs Figure 14. Absolute Phase Noise (Output Driver = 1.8 V CMOS), fR = 2 kHz, fO = 70.656 MHz, DPLL Loop BW = 0.1 Hz, fSYS = 19.2 MHz TCXO 1k 10 100 10k 100k 1M 10M 100M –160 –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 FREQUENCY OFFSET (Hz) INTEGRATED RMS JITTER (12kHz TO 20MHz): 388fs Figure 15. Absolute Phase Noise (Output Driver = HSTL), fR = 19.44 MHz, fO = 644.53 MHz, fSYS = 19.2 MHz TCXO, Holdover Mode 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 FREQUENCY (MHz) Figure 16. Amplitude vs. Toggle Rate, HSTL Mode (LVPECL-Compatible Mode) 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 100 200 300 400 500 600 700 800 FREQUENCY (MHz) LVDS BOOST MODE LVDS DEFAULT Figure 17. Amplitude vs. Toggle Rate, LVDS 1.0 1.5 2.0 2.5 3.0 3.5 0 50 100 150 200 250 300 FREQUENCY (MHz) 3.3V CMOS 1.8V CMOS Figure 18. Amplitude vs. Toggle Rate with 10 pF Load, 3.3 V (Strong Mode) and 1.8 V CMOS |
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