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Si550
4
Rev. 0.5
Table 5. CLK± Output Phase Jitter
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
Phase Jitter (RMS)1,2,3
for FOUT > 500 MHz
φ
J
Kv = 45 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
0.35
0.38
—
ps
Kv = 90 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
0.43
0.41
—
Kv = 135 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
0.52
0.46
—
Kv = 180 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
0.64
0.52
—
Phase Jitter (RMS)1,2,3
for FOUT of 125 to 500 MHz
φ
J
Kv = 45 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
0.42
0.58
—
ps
Kv = 90 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
0.48
0.60
—
Kv = 135 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
0.57
0.64
—
Kv = 180 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
—
0.67
0.68
—
Notes:
1. Differential Modes: LVPECL/LVDS/CML. Refer to AN255, AN256, and AN266 for further information.
2. For best jitter and phase noise performance, always choose the smallest KV that meets the application’s minimum APR
requirements. See “AN266: VCXO Tuning Slope (KV), 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.
Table 6. CLK± Output Period Jitter
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
Period Jitter*
for FOUT < 160 MHz
JPER
RMS
—
2
—
ps
Peak-to-Peak
—
14
—
*Note: Any output mode, including CMOS, LVPECL, LVDS, CML. N = 1000 cycles. Refer to AN279 for further information.
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