LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 23

• 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 following plot illustrates the phase noise performance of the LMK040XX using the VCXO option. In this
case, the VCXO is a Crystek CVPD-920-61.44 MHz LVPECL model.
Table 9. Test Conditions for Phase Noise Measurements, 61.44 VCXO option, LMK04020
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
Figure 16. Typical Phase Noise, LMK040X1, VCXO Option (100 MHz). Jitter metrics are for an integration
-100
-110
-120
-130
-140
-150
-160
-170
-80
-90
100
L M K 0 4 0 X X
1000
Typical Phase Noise, LMK040X1, VCXO Option
E V A L U A T I O N
Value
CLKin0*, single-ended, CLKin0 AC-coupled to GND
61.44 MHz
100 uA
61.44 MHz, Crystek CVPD-920
61.44 MHz
1600 uA
1024 MHz
disabled
bandwidth of 100 Hz to 20 MHz.
10000
Offset (Hz)
23
B O A R D
100000
O P E R A T I N G
1000000
Fout, 1500 MHz, jitter = 193 fs
LVDS, 250 MHz, jitter = 215 fs
LVPECL, 250 MHz, jitter = 203 fs
LVCMOS, 250 MHz, jitter = 201 fs
I N S T R U C T I O N S
10000000
100000000