Datasheet

L M K 0 4 8 X X E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S
43
LMK04806B CLKout Phase Noise
Figure 18: LMK04806B CLKout Phase Noise
Table 17: LMK04806B Phase Noise (dBc/Hz) Phase Noise and RMS Jitter (fs)
Offset
1228.80 MHz
LVDS
1228.80 MHz
LVPECL
491.52 MHz
LVDS
491.52 MHz
LVPECL
100 Hz
-91.2
-90.5
-97.5
-98.2
1 kHz
-111.2
-110.8
-118.7
-119.4
10 kHz
-121.0
-121.1
-128.5
-128.6
100 kHz
-121.3
-121.2
-129.5
-129.5
800 kHz
-133.8
-133.7
-141.9
-141.9
1 MHz
-135.8
-135.7
-143.4
-143.8
10 MHz
-150.2
-150.4
-153.1
-155.7
20 MHz
-150.8
-151.0
-153.8
-155.7
RMS Jitter (fs)
10 kHz to 20 MHz
92.9
93.4
97.5
94.5
RMS Jitter (fs)
100 Hz to 20 MHz
104.0
105.3
109.0
105.4
For the LMK04806B, the internal VCO frequency is 2457.60 MHz. The divide-by-10 CLKout
frequency is 245.76 MHz, and the divide-by-20 CLKout frequency is 122.88 MHz.