LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 45

• 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

Figure 20
Figure 21
2. Disconnect Crystal RF path and connect VCXO RF path
3. Connect charge pump output from PLL1 to VCXO Loop Filter (A1) and VCXO.
a. Remove resistors R15 and R31.
b. Install 0.1 uF capacitors in C31 and C43.
a. Remove R37 and install a 0 ohm resistor in R39. This resistor can be “switched”
between the two footprints.
L M K 0 4 0 X X - R E V 3
E V A L U A T I O N
45
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