Datasheet
Data Sheet AD9525
Rev. A | Page 9 of 48
CLOCK OUTPUT ABSOLUTE TIME JITTER (CLOCK GENERATION USING EXTERNAL 2.05 GHZ VCO)
Table 14.
Parameter Min Typ Max Unit Test Conditions/Comments
LVPECL OUTPUT ABSOLUTE TIME JITTER
Application example based on a typical setup using
an external 2.05 MHz VCO (Bowei Model MVCO-
2050A); reference = 122.054215 MHz; R divider = 12;
PLL LBW = 5 kHz
FOUT = 2048.867 MHz 19 fs rms Integration BW = 200 kHz to 5 MHz
21 fs rms Integration BW = 200 kHz to 10 MHz
87
fs rms
Integration BW = 12 kHz to 20 MHz
Reference Sideband Spurs −105 dBc ±10.671MHz
CLOCK OUTPUT ABSOLUTE TIME JITTER (CLOCK GENERATION USING EXTERNAL 3 GHZ VCO)
Table 15.
Parameter Min Typ Max Unit Test Conditions/Comments
LVPECL OUTPUT ABSOLUTE TIME JITTER
Application example based on a typical setup using
an external 2950 MHz VCO (Z-Communications Model
CRO-2950); reference = 122.88 MHz; R divider = 1
FOUT = 2949.12 MHz; PLL LBW = 7 kHz 63 fs rms Integration BW = 1 kHz to 100 MHz
38 fs rms Integration BW = 10 kHz to 100 MHz
34 fs rms Integration BW = 10 kHz to 40 MHz
28
fs rms
Integration BW = 12 kHz to 20 MHz
Reference Sideband Spurs −99 dBc ±122.88 MHz
FOUT = 1474.56 MHz; PLL LBW = 7 kHz 62 fs rms Integration BW = 1 kHz to 100 MHz
36 fs rms Integration BW = 10 kHz to 100 MHz
31 fs rms Integration BW = 10 kHz to 40 MHz
25 fs rms Integration BW = 12 kHz to 20 MHz
Reference Sideband Spurs −100 dBc ±122.88 MHz
FOUT = 491.52 MHz; PLL LBW = 7 kHz 78 fs rms Integration BW = 1 kHz to 100 MHz
60 fs rms Integration BW = 10 kHz to 100 MHz
44 fs rms Integration BW = 10 kHz to 40 MHz
33 fs rms Integration BW = 12 kHz to 20 MHz
Reference Sideband Spurs
−96
dBc
±122.88 MHz
CLOCK OUTPUT ADDITIVE PHASE NOISE (DISTRIBUTION ONLY; CLOCK INPUT TO DISTRIBUTION OUTPUT,
INCLUDING VCO DIVIDER)
Table 16.
Parameter Min Typ Max Unit Test Conditions/Comments
CLK-TO-LVPECL ADDITIVE PHASE NOISE Distribution section only; does not include PLL and VCO
CLK = 2949.12 MHz, FOUT = 2949.12 MHz
Divider = 1
At 10 Hz Offset −112 dBc/Hz
At 100 Hz Offset −122 dBc/Hz
At 1 kHz Offset −133 dBc/Hz
At 10 kHz Offset −141 dBc/Hz
At 100 kHz Offset −146 dBc/Hz
At 800 kHz Offset −148 dBc/Hz
At 1 MHz Offset
−148
dBc/Hz
At 10 MHz Offset −149 dBc/Hz
At 100 MHz Offset −151 dBc/Hz