LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 22

• Manufacturer Part Number: LMK04000BEVAL/NOPB
• Description: BOARD EVAL PRECISION CLOCK PLL
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LMK04000BEVAL/NOPB

• Main Purpose: Timing, Clock Conditioner
• Embedded: No
• Utilized Ic / Part: LMK04000
• Primary Attributes: 122.88 MHz VCXO
• Secondary Attributes: Integrated PLL & VCO
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMK04000BEVAL; LMK04000BEVAL

The next sets of phase noise plots represent typical performance achieved using modular VCXO
packages with PLL1. The first set of plots contains the VCXO phase noise plots for the 100 MHz VCXO
and the 61.44 MHz VCXO.
Figure 15. LMK040X1 Evaluation Board, typical VCXO Phase Noise, 100 MHz and 61.44 MHz VCXOs.
The following table lists the test conditions used for the phase noise measurements based upon the
VCXO option, 100 MHz:
Table 8. LMK040XX test conditions, 100 MHz VCXO Option, LMK04021
Parameter
PLL1 Reference clock input
PLL1 Reference Clock frequency
PLL1 Phase detector frequency
PLL1 Charge Pump Gain
VCXO frequency
PLL2 phase detector frequency
PLL2 REF2X mode
PLL2 Charge Pump Gain
The following plot illustrates the phase noise performance of the LMK040XX using the VCXO option. The
VCXO represented in these plots is a Crystek CVPD-920-100MHz LVPECL model.
-100
-110
-120
-130
-140
-150
-160
-80
-90
100
L M K 0 4 0 X X
1000
LMK040x1 Evaluation Board VCXO Phase Noise
E V A L U A T I O N
10000
Value
CLKin0, single-ended, CLKin0* AC-coupled to GND
100 MHz
1000 kHz
100 uA
100 MHz, Crystek CVPD-920
50 MHz
disabled
3200 uA
Offset (Hz)
100000
22
B O A R D
O P E R A T I N G
1000000
10000000
I N S T R U C T I O N S
61.44MHz VCXO
100MHz VCXO
100000000