Datasheet

Evaluation Board User Guide UG-155
Rev. 0 | Page 5 of 12
0
9114-005
Figure 5. AD5668 Evaluation Board Main Window
SOFTWARE OPERATION
Follow the steps below to operate the software:
1. From the Analog Devices menu, click Start > All
Programs > Analog Devices >AD5668 > AD5668 SDP
Evaluation Software.
For older PCs, click Start > Programs > Analog Devices >
AD5668 >AD5668 SDP Evaluation Software.
The AD5668 main window opens, as shown in Figure 5.
The data programmed into the 32-bit input shift register
is displayed. You can select the command bits, the address
bits, and the data bits by clicking the appropriate button
under each area.
2. To select a command to program the part, select the
appropriate option from the drop-down menu under
Command Menu. For example, to program all DAC
outputs with full scale , select Write to and Update DAC
channel n and then click All DACs under Address Bits.
3. In the Data Bits section, enter the data in decimal format
in the Enter Value field. To execute, click Write to Part.
Note that you must click Write to Part to execute all writes
to the part.
4. The voltage output on each DAC channel is monitored
using the on-board ADC. To read the output voltage, click
SAMPLE, in the ADC section (in the upper right of the
window).
5. To set up the power-down DAC bits, the clear code register
bits, and the LDAC register bits, select the appropriate
option from the drop-down menu under Command Menu
and click Write to Part. You can also set the register bits
for the required mode of operation. Consult the AD5668
data sheet for details.
6. To s et
LDAC
and
CLR
to high or low, click the corres-
ponding check box under Hardware Pins. Because this
command is executed immediately, there is no need to
click Write to Par t.