Si540 Data Sheet
Electrical Specifications
Table 2.3. 3.2 x 5 mm Clock Output Phase Noise (Typical)
Offset Frequency (f)
100 Hz
156.25 MHz LVDS
200 MHz LVDS
–107
644.53125 MHz LVDS
Unit
dBc/Hz
Unit
–110
–121
–132
–139
–151
–160
–161
–99
1 kHz
–120
–109
–121
–127
–138
–155
–157
10 kHz
–130
100 kHz
–137
1 MHz
–149
10 MHz
–161
20 MHz
–162
Offset Frequency (f)
156.25 MHz
LVPECL
200 MHz
LVPECL
644.53125 MHz
LVPECL
100 Hz
1 kHz
–113
–123
–133
–139
–151
–162
–163
–110
–120
–130
–137
–149
–166
–167
–100
–110
–119
–127
–138
–156
–157
10 kHz
100 kHz
1 MHz
dBc/Hz
10 MHz
20 MHz
Phase jitter measured with Agilent E5052 using a differential-to-single ended converter (balun or buffer). Measurements collected for
>700 commonly used frequencies. Phase noise plots for specific frequencies are available using our free, online Oscillator Phase Noise
Lookup Tool at www.silabs.com/oscillators.
Figure 2.1. Phase Jitter vs. Output Frequency
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