Datasheet

Evaluation Board User Guide UG-327
Rev. A | Page 5 of 12
EXAMPLE 1
Select the AD5453 part from the main window. Check the
Clock Data To Shift Register on Rising Edge box, and click the
OK button. The AD5453 Evaluation Software Window should
appear. The LED indicator with the Rising Edge Active label
should be lit indicating the actual functionality mode (see
Figure 5).
Enter Data 0x2000 (half scale) in the Input Data control and
click the Write to DAC button. Data is clocked on the rising
edge instead of the falling edge (by default). There is no loss of
data; therefore, the output shows the expected −5 V value. The
only change is the way the data is clocked.
V5
16,384
8,192
10
2
−=×−=×−=
n
REF
OUT
D
VV
EXAMPLE 2
Select the AD5446 part from the main window and click the
OK button. The AD5446 Evaluation Software Window should
appear. Enter Data 0x3FFF (full scale) in the Input Data control
and click the Write to DAC button. The output shows −10 V, and
because this write was the first action on the DAC after powering
up, the data on the SDO pin is not taken into account because
the data is not given any information.
V
D
VV
n
REF
OUT
10
384,16
383,16
10
2
−=×−=×−=
Write Data 0x1000 (quarter scale) to the DAC. The output changes
its voltage from −10 V to −2.5 V, a n d the previous data written
to the part will appear on the SDO pin (in this example, −10 V).
V
D
VV
n
REF
OUT
10
384,16
383,16
10
2
−=×−=×−=
To finish evaluating the part, push the STOP button.
To disable daisy-chain mode, check the Disable Daisy-chain
box in the Main Window after launching the application and
before clicking the OK button. The LED indicator with the
Daisy-chain Disabled label will be lit indicating the function-
ality mode.
EXAMPLE 3
Select the AD5443 part from the Main Window and click the OK
button. The AD5443 Evaluation Software Window should appear.
Enter Data 0x800 (half scale) in the Input Data control and
select Load And Update. The output shows the expected −5 V value.
V
D
V
V
n
REF
OUT
5
096
,
4
048
,
2
10
2
−
=×
−
=×
−
=
Select Clear DAC Output To Zero Scale to get a voltage value
of 0 V on the output.
To put the part in three-quarter scale, write 0xBFD in the Input
Data control and select Load And Update.
V
D
VV
n
REF
OUT
5.7
096,4
069,3
10
2
−=×−=×−=
To verify the data in the DAC register is correct, select Initiate
Readback and the indicator window beside this option shows
−7.5 V.