Datasheet
Data Sheet AD9520-3
Rev. A | Page 11 of 80
CLOCK OUTPUT ABSOLUTE PHASE NOISE (INTERNAL VCO USED)
Table 7.
Parameter Min Typ Max Unit Test Conditions/Comments
LVPECL ABSOLUTE PHASE NOISE
Internal VCO; direct-to-LVPECL output and
for loop bandwidths < 1 kHz
VCO = 2.25 GHz; Output = 2.25 GHz
1 kHz Offset −50 dBc/Hz
10 kHz Offset −82 dBc/Hz
100 kHz Offset −107 dBc/Hz
1 MHz Offset −126 dBc/Hz
10 MHz Offset −140 dBc/Hz
40 MHz Offset −146 dBc/Hz
VCO = 2 GHz; Output = 2 GHz
1 kHz Offset −55 dBc/Hz
10 kHz Offset
−85
dBc/Hz
100 kHz Offset −110 dBc/Hz
1 MHz Offset −129 dBc/Hz
10 MHz Offset −142 dBc/Hz
40 MHz Offset −147 dBc/Hz
VCO = 1.75 GHz; Output = 1.75 GHz
1 kHz Offset −59 dBc/Hz
10 kHz Offset −89 dBc/Hz
100 kHz Offset −114 dBc/Hz
1 MHz Offset −132 dBc/Hz
10 MHz Offset −143 dBc/Hz
40 MHz Offset −147 dBc/Hz
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 divider = 1
VCO = 1.966 GHz; LVPECL = 245.76 MHz; PLL LBW = 55 kHz 135 fs rms Integration BW = 200 kHz to 10 MHz
308 fs rms Integration BW = 12 kHz to 20 MHz
VCO = 1.966 GHz; LVPECL = 122.88 MHz; PLL LBW = 55 kHz 129 fs rms Integration BW = 200 kHz to 10 MHz
293 fs rms Integration BW = 12 kHz to 20 MHz
VCO = 1.966 GHz; LVPECL = 61.44 MHz; PLL LBW = 55 kHz 163 fs rms Integration BW = 200 kHz to 10 MHz
323 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 = 19.44 MHz; R divider = 162
VCO = 1.866 GHz; LVPECL = 155.52 MHz; PLL LBW = 1.9 kHz
377
fs rms
Integration BW = 12 kHz to 20 MHz
VCO = 1.966 GHz; LVPECL = 122.88 MHz; PLL LBW = 2.2 kHz 386 fs rms Integration BW = 12 kHz to 20 MHz