Texas Instruments LMK04131 Clock Jitter Cleaner with Cascade PLL LMK04131EVAL/NOPB LMK04131EVAL/NOPB Fiche De Données
Codes de produits
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
17
Clock Outputs
The LMK04100 Family features LVDS, LVPECL, 2VPECL, and LVCMOS types of outputs.
Included below are various phase noise measurements for each output.
Included below are various phase noise measurements for each output.
Device
LVDS
LVPECL/2VPECL
LVCMOS
VCO Frequency
LMK041x0
(LMK04100)
X
X
1185 to 1296 MHz
LMK041x1
(LMK04131)
X
X
X
1430 to 1570 MHz
LMK041x2
(LMK04102)
X
X
1566 to 1724 MHz
LMK041x3
(LMK04133)
X
X
X
1840 to 2160 MHz
Note: The device in parenthesis is the device used for the measurement in these evaluation board
instructions.
instructions.
Clock Output Measurement Technique
The measurement technique for each output type varies.
LVDS – measured with an ADT2-1T balun to test equipment.
LVPECL/2VPECL – Measured by terminating complementary output with 50 ohm load, then
taking output to test equipment.
LVCMOS – Measured by enabling only one side of the LVCMOS output and taking the
operating output to test equipment.
The following table lists the test conditions used for the phase noise measurements for the
VCXO option:
LVDS – measured with an ADT2-1T balun to test equipment.
LVPECL/2VPECL – Measured by terminating complementary output with 50 ohm load, then
taking output to test equipment.
LVCMOS – Measured by enabling only one side of the LVCMOS output and taking the
operating output to test equipment.
The following table lists the test conditions used for the phase noise measurements for the
VCXO option:
Table 7 . LMK041xx test conditions
Parameter
Value
PLL1 Reference clock input
CLKin0* single-ended input, CLKin0 AC-coupled to GND
PLL1 Reference Clock frequency 122.88 MHz
PLL1 Phase detector frequency
PLL1 Phase detector frequency
1024 kHz
PLL1 Charge Pump Gain
100 uA
VCXO frequency
122.88 MHz
PLL2 phase detector frequency
61.44 MHz
PLL2 Charge Pump Gain
3200 uA
PLL2 REF2X mode
Disabled