Si570/Si571
Table 5. CLK± Output Phase Jitter
Parameter
Phase Jitter (RMS) 1
for F OUT > 500 MHz
Phase Jitter (RMS) 1
for F OUT of 125 to 500 MHz
Phase Jitter (RMS)
for F OUT of 10 to 160 MHz
CMOS Output Only
Symbol
? J
? J
? J
Test Condition
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192) 2
12 kHz to 20 MHz (OC-48) 2
50 kHz to 20 MHz
Min
Typ
0.25
0.26
0.36
0.34
0.62
0.61
Max
0.40
0.37
0.50
0.42
Unit
ps
ps
ps
Notes:
1. Refer to AN256 for further information.
2. Max offset frequencies: 80 MHz for FOUT > 250 MHz, 20 MHz for 50 MHz < FOUT <250 MHz,
2 MHz for 10 MHz < FOUT <50 MHz.
Table 6. CLK± Output Phase Jitter (Si571)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Phase Jitter (RMS) 1,2,3
? J
Kv = 33 ppm/V
ps
for F OUT > 500 MHz
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
0.26
0.26
Kv = 45 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
0.27
0.26
Kv = 90 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
0.32
0.26
Kv = 135 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
0.40
0.27
Kv = 180 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
0.49
0.28
Kv = 356 ppm/V
12 kHz to 20 MHz (OC-48)
50 kHz to 80 MHz (OC-192)
0.87
0.33
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 K V 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.
4. Single ended mode: CMOS. Refer to the following application notes for further information:
“AN255: Replacing 622 MHz VCSO Devices with the Si55x VCXO”
“AN256: Integrated Phase Noise”
“AN266: VCXO Tuning Slope (kV), Stability, and Absolute Pull Range (APR)”
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.
8
Rev. 1.4
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