ADC32RF80 Quick-Start Procedure (Digital DDC Block - Decimation Plus NCO) External Clocking
14
SLAU620A – April 2016 – Revised May 2016
Copyright © 2016, Texas Instruments Incorporated
ADC32RF45/RF80 EVM Quick Startup Guide
Fs = 2.94912GHz, 8x Decimation Example, External Clocking
This example captures 8x decimated data from channel A of the ADC32RF80 EVM sampling at 2.94912
GHz with a 1960-MHz IF input source. This procedure uses a .cfg file to set up the LMK04828 clock
device first. (Later, if the LMX2582 clocking option is used, there are cfg files to set up the LMX2582.)
Finally, there are cfg files to setup the ADC32RF80. This is always the required sequence: setup the
LMK04828, then the LMX2582 if the clock synthesizer is used, and finally the ADC32RF80.
The ADC
requires the device clock and SYSREF signals to be present before the ADC can be properly
configured so the LMK (and optional LMX if used) setup must have been done before configuring
the ADC
.
1. Open the ADC32RFxx EVM RevD GUI.
2. Verify that the green
USB Status
indicator is lit. If it is not lit, click the
Reconnect?
button and check the
USB Status
indicator again. If it is still not lit then verify the EVM is connected to the computer through
USB. Whenever the USB link is disturbed, the GUI must obtain a new handle to address the proper
USB port, and the
Reconnect?
button does that.
Figure 10. ADC32RFxxEVM GUI LMK04828 PLL1 Page
3. On the
LMK04828 PLL1
tab, press the
RESET
button.
4. Click on the
Low Level View
tab.
5. Navigate to the provided file called
LMK_ADC32RF4x_ExtClk.cfg
and click
OK
.
