Copyright © 2017, Texas Instruments Incorporated
Board Setup Examples
31
SLAU711 – March 2017
Copyright © 2017, Texas Instruments Incorporated
HSDC Pro With Xilinx
®
KCU105
7.6.2
Phased-Locked Loop (PLL) Mode DAC38RF82EVM
This section shows how to setup an DAC38RF82EVM using the internal PLL to generate the clocking.
This example will configure the JESD204B DAC in an 841 mode.
Set up the hardware as follows:
1. Connect a 245.76 MHz, 12-dBm output from a signal generator to EVM LMK CLKIN (J4) of the
DAC38RF82EVM.
2. Verify that the jumper labeled JP10 is OPEN.
3. Connect a power cable to the DAC38RF82EVM and open the DAC38RFXX GUI. The GUI is found
under "Software" on
featuring the
4. On the
Quick Start
tab, toggle the
DAC RESETB Pin
and press the
Load Default
button
5. Configure the GUI as shown in
:
(a)
PLL Enable
– "Check"
(b)
M
– "9",
N
– "1"
(c)
Ref Freq (MHz)
– "245.76"
(d)
# of DACs
– "Dual DAC"
(e)
# of IQ pairs per DAC
– "1 IQ pair"
(f)
# of serdes lanes per DAC
– "4 Lanes"
(g)
Desired Interpolation
– "18x"
Figure 30. DAC38RFXX EVM GUI in PLL Mode
6. Press the
CONFIGURE DAC
button, followed by the
PLL AUTO TUNE
button, then the
Reset DAC
JESD Core & SYSREF TRIGGER
button.