Texas Instruments ADC32RF-EVM Series, User Manual, Page: 36 / 44

ADC32RFxx Internally Generated Clocking
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36 SLAU620D – April 2016 – Revised August 2017
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ADC32RFxx-EVM
8 ADC32RFxx Internally Generated Clocking
8.1 ADC32RF45 EVM LMX2582 (or LMX2592) Clocking
Set up the TSW14J56 and ADC32RF45 the same way as it was set up for external clocking, but with the
following modifications for internal clocking.
Section 6 has already demonstrated the use of the LMX2582
for generating the clocking internal to the EVM, but this section covers more completely the use of either
the LMX2582 or LMK04828 for clocking the ADC.
1. Verify the clocking selection jumper JP3 is set to the INT position to select the clock to the ADC to be
generated on the EVM, either by the LMX2582 or the LMK04828. The default configuration for the
EVM is for the LMX2582 to be the clock source to the ADC while in internal clock mode. (To select the
LMK04828 as the ADC clock source, there are two AC coupling caps to unsolder and resolder in a
different position.) There need not be any input to the J5 external clock SMA. If the LMK04828 is to be
synchronized to the timebase of the signal generator used for the analog input, then connect the 10-
MHz sync signal from the signal generator to the LMK04828 reference input J7.
2. All but one step to configure the device in this mode are the same as previously described in
Section 3.2 . The only step different is the choice of Clock Source to ADC . That step is to be selected
as shown in Figure 34 . The rest of the steps in Section 3.2 must be followed.
Figure 34. ADC32RFxx EVM GUI With LMX Clock Configuration