LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 10

• 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

5. Visual Confirmation of Frequency Lock
After a device is selected and a default mode restored and loaded, the visual display on the board
should indicate a clock present at CLKin0 (LED D3 off) and that the PLL is locked (LED D1 on).
D1 will be on because the mode default sets PLL_MUX = PLL1/2 DLD Active High.
Figure 5 – Visual indicators of proper operation of evaluation board
6. Enable Fout
To measure the phase noise of the VCO,
See Appendix B: Typical Phase Noise Performance
Plots for phase noise plots of the VCO.
1. Go to the Bits/Pins tab and enable the
2. Connect the Fout SMA on the left hand side of
“EN_Fout” bit.
the board to a spectrum analyzer or signal
source analyzer.
L M K 0 4 0 X X - R E V 3
E V A L U A T I O N
10
B O A R D
O P E R A T I N G
Red LED off
LED D3 on if no signal
detected on CLKin0 port.
Green LED on
LED D1 on if locked when
PLL_MUX = PLL1/2 DLD
Active High. (mode default)
I N S T R U C T I O N S