Datasheet

8.2 Engage Power Supplies
8.3 Verify Status of the Board
8.4 Program the CDCM7005
8.5 Program the DAC5682Z
Initial Power Up and Test www.ti.com
Plug in the 6-Vdc wall plug.
The DAC software will detect if the USB port is active and if it is capable of reading the serial number from
the EVM. This determines if the communication between the board and the PC is correct. The HOME
menu of the DAC GUI software indicates this status. The VCXO and Reference LEDs (D1, D2) must be lit
as well as the power LED (D18).
On the DAC5682z EVM GUI, click on "Register Config" which is located on the left side of the GUI.
Program the registers as necessary manually or load a saved configuration file. An example file for
loading the CDCM7005 called "CDCM7005_4X_Interp.reg7005" can be found on the provided CD. To
load this file, click on the "Load Regs" button on the lower center of the GUI. Navigate to the correct
location, select this file, then click on "OK". The default mode of GUI has the "CDCM7005 Operation" set
to "Buffer Mode". Click on this button and change the setting to "PLL Mode". Next, change the "VCXO
Freq (MHz)" default value of "983.04 to "800" by either clicking on the down arrow of this button or
entering "800" manually. Hit enter and the new settings will be sent to the CDCM7005. Note that the
CDCM7005 LOCK LED (D3) is now lit as it achieves lock between the VCXO and 10-MHz reference. This
LED does not illuminate when using external VCXO.
Figure 16. CDCM7005, 800M VCXO, 10M Ref, Locked Condition LEDs
On the DAC5682z EVM GUI, click on "DAC5682 Diagram" which is located on the left side of the GUI.
Program the DAC5682z registers as necessary manually or load a saved configuration file. An example
file for loading the DAC5682z called "DLL_4X_Interp.reg5682" can be found on the provided CD. To load
this file, click on the "Load Regs" button on the right center side of the GUI. Navigate to the correct
location, select this file, then click on "OK". The registers will be loaded and the GUI should now look as
shown in Figure 17. If the DLL Lock light is red, make sure the pattern generator is providing a proper
DCLK to the TSW3070EVM.
24 TSW3070EVM: Amplifier Interface to Current Sink DAC - Arbitrary Waveform Generator Demonstration SLWU055 – May 2008
Submit Documentation Feedback