Texas Instruments LMK04131 Clock Jitter Cleaner with Cascade PLL LMK04131EVAL/NOPB LMK04131EVAL/NOPB 数据表
产品代码
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
10
The Reference Oscillator value field may be changed in either the Clock Outputs tab or the PLL2
tab. Note this value should match the value of the on-board VCXO or Crystal. When using the
EN_PLL2_REF2X = 1, then Reference Oscillator field should be twice the VCXO or Crystal
frequency.
tab. Note this value should match the value of the on-board VCXO or Crystal. When using the
EN_PLL2_REF2X = 1, then Reference Oscillator field should be twice the VCXO or Crystal
frequency.
PLL1 Tab
Figure 4 - PLL1 tab.
The PLL1 tab allows the user to change:
External VCXO (or Crystal oscillator) frequency. Note: This value must be entered in
both the PLL1 and PLL2 tabs.
PLL1 Phase detector frequency
PLL1 R-counter value
PLL1 N-counter value
CLKin (Reference) oscillator frequency
PLL1 Phase Detector polarity (for external VCXO tuning slope, click on the polarity
PLL1 R-counter value
PLL1 N-counter value
CLKin (Reference) oscillator frequency
PLL1 Phase Detector polarity (for external VCXO tuning slope, click on the polarity
value)
PLL1 Charge pump gain (left click and right click on the charge pump current value)
PLL1 Charge pump state (click on the charge pump state value)
PLL1 Charge pump state (click on the charge pump state value)
Note that the value entered in the VCO frequency field on the PLL1 tab must match the
Reference Oscillator frequency entered on the PLL2 tab and the OSCin_FREQ on the Bits/Pins
tab. Updating the PLL2 tab Reference Oscillator frequency will automatically update the value
of OSCin_FREQ on the Bits/Pins tab. The only time that the Reference Oscillator frequency of
PLL2 tab will be different from the VCO frequency of PLL1 is when the EN_PLL2_REF2X
mode is enabled.