Datasheet

AD9518-4 Data Sheet
Rev. B | Page 8 of 64
CLOCK OUTPUT ABSOLUTE TIME JITTER (CLOCK GENERATION USING INTERNAL VCO)
Table 8.
Parameter Min Typ Max Unit Test Conditions/Comments
LVPECL OUTPUT ABSOLUTE TIME JITTER
Application example based on a typical
setup where the reference source is clean,
so a wider PLL loop bandwidth is used;
reference = 15.36 MHz; R = 1
VCO = 1475 MHz; LVPECL = 491.52 MHz; PLL LBW = 135 kHz 135 fs rms Integration BW = 200 kHz to 10 MHz
275 fs rms Integration BW = 12 kHz to 20 MHz
VCO = 1475 MHz; LVPECL = 122.88 MHz; PLL LBW = 135 kHz 145 fs rms Integration BW = 200 kHz to 10 MHz
275 fs rms Integration BW = 12 kHz to 20 MHz
VCO = 1475 MHz; LVPECL = 61.44 MHz; PLL LBW = 135 kHz 170 fs rms Integration BW = 200 kHz to 10 MHz
305 fs rms Integration BW = 12 kHz to 20 MHz
CLOCK OUTPUT ABSOLUTE TIME JITTER (CLOCK CLEANUP USING INTERNAL VCO)
Table 9.
Parameter Min Typ Max Unit Test Conditions/Comments
LVPECL OUTPUT ABSOLUTE TIME JITTER
Application example based on a typical
setup where the reference source is jittery,
so a narrower PLL loop bandwidth is used;
reference = 10.0 MHz; R = 20
VCO = 1555 MHz; LVPECL = 155.52 MHz; PLL LBW = 500 Hz 500 fs rms Integration BW = 12 kHz to 20 MHz
VCO = 1475 MHz; LVPECL = 122.88 MHz; PLL LBW = 500 Hz 400 fs rms Integration BW = 12 kHz to 20 MHz
CLOCK OUTPUT ABSOLUTE TIME JITTER (CLOCK GENERATION USING EXTERNAL VCXO)
Table 10.
Parameter Min Typ Max Unit Test Conditions/Comments
LVPECL OUTPUT ABSOLUTE TIME JITTER
Application example based on a typical
setup using an external 245.76 MHz VCXO
(Toyocom TCO-2112); reference = 15.36 MHz;
R = 1
LVPECL = 245.76 MHz; PLL LBW = 125 Hz 54 fs rms Integration BW = 200 kHz to 5 MHz
77 fs rms Integration BW = 200 kHz to 10 MHz
109 fs rms Integration BW = 12 kHz to 20 MHz
LVPECL = 122.88 MHz; PLL LBW = 125 Hz 79 fs rms Integration BW = 200 kHz to 5 MHz
114 fs rms Integration BW = 200 kHz to 10 MHz
163 fs rms Integration BW = 12 kHz to 20 MHz
LVPECL = 61.44 MHz; PLL LBW = 125 Hz 124 fs rms Integration BW = 200 kHz to 5 MHz
176 fs rms Integration BW = 200 kHz to 10 MHz
259 fs rms Integration BW = 12 kHz to 20 MHz