ICS9214 Datasheet, PDF (14/16 Pages) Integrated Circuit Systems – Rambus XDR Clock Generator

Integrated
Circuit
Systems, Inc.
ICS9214
Phase Noise
The 9214 meets the single side band phase noise spectral purity for offset frequencies between 1 MHz and 100 MHz as
described by the equation:
10log[1+(50 x 106/f)2.4] -138 dBc/Hz
This equation is shown in Figure 9. Phase Noise Plot
-100
-110
-120
-130
-140
-150
10 ⁶
10 log[1 + ( 50x 10⁶/ f )^2.4] -138
( Upper Lim it )
1 0⁷
10 ⁸
Offs et Freq u e ncy f , H z
10 ⁹
Figure 9 : Phase Noise Plot
Sample points are for this equation are shown in Table 6. Phase Noise Data Points
Offset
Frequency
1
(MHz)
SSB Spectral
Purity
-97
(dbc/Hz)
5
10
15
20
40
80
100
-114
-121
-125.2 -128 -133.7 -136.8 -137.3
Table 6 : Phase Noise Data Points
0809D—04/07/06
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