EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide UG-814
Rev. 0 | Page 9 of 12
12993-005
Figure 5. AD5676/AD5676R Evaluation Software Main Window
SOFTWARE OPERATION
The AD5676/AD5676R evaluation software allows the user to
program values to the input and DAC registers of each DAC
individually or collectively.
Write to Input Register
Click Write to Input Register to load the code of the input data
control to the input register of the selected DAC in the DAC
Selection box.
Update DAC Register from Input Register
Click Update DAC Register from Input Register to copy the
value in the input register to the corresponding DAC register.
DAC outputs are automatically updated with the appropriate
voltage. LDAC mask settings are ignored.
Write to DAC Register
Select Write to Input and DAC Register to load the code of the
input data control to the input register and DAC register of the
selected DAC. The DAC outputs are automatically updated with
the appropriated voltage. LDAC mask settings are ignored.
Gain Control
Select GAIN ×1 to give a full-scale output of 2.5 V for the
AD5676R or V
REF
for the AD5676. Select GAIN ×2 to give a
full-scale output of 5 V for the AD5676R or 2 × V
REF
for the
AD5676.
LDAC Control
Click Pulse LDAC to bring the LDAC pin low and then back
high. Doing this copies the data from the input registers to the
DAC registers, and the outputs update accordingly. Any DAC
updates disabled by the LDAC mask settings are ignored.
The LDAC pin can also be set high or low by selecting the
appropriate radio button.
Power-Down Control
Each of the DACs can be powered down individually. Each of
the DACs has an associated selection box allowing the part to
operate in normal mode or power-down mode. Click the blue
progressive disclosure buttons to access the selection box. When
the power-down setting for each DAC is selected, click Confirm
to write the appropriate values to the AD5676/AD5676R.
LDAC Mask Register
Each of the DACs has an associated selection box allowing the
part to be set to respond or ignore LDAC pulses. Click the blue
progressive disclosure buttons to access the selection box. When
the LDAC selections are completed, click Confirm to write the
appropriate values to the AD5676/AD5676R.
SPI Command
The Full SPI Command box shows the value that must be
written to the AD5676/AD5676R to replicate the function of
the evaluation board.
