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Si554
Table 5. CLK± Output Phase Jitter (Continued)
Phase Jitter (RMS)
Parameter
1,2,3,4,5
for F OUT of 125 to 500 MHz
Symbol
? J
Test Condition
Kv = 33 ppm/V
12 kHz to 20 MHz (OC-48)
Min
—
Typ
0.37
Max
—
Units
ps
50 kHz to 80 MHz (OC-192)
—
0.33
—
Kv = 45 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
—
0.37
0.33
0.4
—
ps
Kv = 90 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
—
0.43
0.34
—
—
ps
Kv = 135 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
—
0.50
0.34
—
—
ps
Kv = 180 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
—
0.59
0.35
—
—
ps
Kv = 356 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
—
1.00
0.39
—
—
ps
Notes:
1. Refer to AN255, AN256, and AN266 for further information.
2. For best jitter and phase noise performance, always choose the smallest K V that meets the application’s minimum APR
requirements. See “AN266: VCXO Tuning Slope (K V ), Stability, and Absolute Pull Range (APR)” for more information.
3. See “AN255: Replacing 622 MHz VCSO devices with the Si550 VCXO” for comparison highlighting power supply
rejection (PSR) advantage of Si55x versus SAW-based solutions.
4. Max jitter for LVPECL output with V C =1.65V, V DD =3.3V, 155.52 MHz.
5. Max offset frequencies: 80 MHz for F OUT > 250 MHz, 20 MHz for 50 MHz < F OUT <250 MHz,
2 MHz for 10 MHz < F OUT <50 MHz.
Rev. 1.1
5
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