Texas Instruments LMK04131 Clock Jitter Cleaner with Cascade PLL LMK04131EVAL/NOPB LMK04131EVAL/NOPB Datenbogen
Produktcode
LMK04131EVAL/NOPB
L M K 0 4 1 X X - R E V 3 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
SNLU099
40
PLL1 has been designed to work with either an off-the-shelf VCXO package or with a user-
designed discrete implementation that employs a crystal resonator and associated tuning
components. The Figure 21 shows an example of a discretely implemented VCXO using a
crystal resonator.
designed discrete implementation that employs a crystal resonator and associated tuning
components. The Figure 21 shows an example of a discretely implemented VCXO using a
crystal resonator.
Figure 21 - LMK041xx with the XTAL Resonator option and Tuning Circuit
LMK04100 Family evaluation boards are configured with either a VCXO or Crystal (-XO) on
board. It is possible to place a VCXO on a Crystal board or a Crystal on a VCXO board by
removing and replacing certain components on the board. Instructions for modifying the board
are presented in Appendix G: VCXO/Crystal changes.
Figure 22 below shows the crystal oscillator circuit diagram.
PLL2
PLL1
R
1
Dq
1
N
1
R
2
N
2
Dq
2
VCO
CLKin0
CLKin1
VCO
DIV
CHAN
DIV
D
CHAN
DIV
D
5 Output Clock
Channels
LVPECL, LVDS,
LVCMOS
F
OUT
CLKout_0
CLKout_4
uWire
Interface
DATA
CLK
LE