Texas Instruments ADS42JBx9, User Manual, Page: 12 / 24

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2.2.5.4 PLL2 Settings Controls
Clicking PLL2 SETTINGS in the block diagram opens a new window, shown in Figure 9 . This panel
controls the PLL2 settings of the LMK04828. Once these values are properly entered and PLL2 becomes
locked, LED D4 (PLL2 Locked) on the ADS42JBx9EVM illuminates. A reason this does not illuminate is
using the wrong divider values. Use the LMK clock design tools when determining external PLL loop filter
components. Go to the LMK04828 product folder on the TI website to download this tool and other
application notes.
Figure 9. LMK04828 PLL2 Controls
2.2.5.5 Internal VCO Controls
Clicking Internal VCO in the block diagram allows selection of either internal VCO0 or VCO1.
2.2.5.6 OSCout Controls
Clicking OSCout in the block diagram provides control of the OSC output (currently not used on the EVM).
12 ADS42JBx9 System Evaluation Kit SLAU468A – November 2012
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