UG-250 Datasheet, PDF (6/12 Pages) Analog Devices – Evaluation Board for 16-Bit, Serial Input, Loop-Powered 4 mA to 20 mA DAC

UG-250
Evaluation Board User Guide
Figure 3. Main Window
MAIN WINDOW
DAC Register
As can be seen in Figure 3, the main window is made up of
5 tabs; Control Register, DAC Register, Fault Register,
Program Loop Current, and Command Write. Outside
of the tab structure at the top right of the window are two
control items; LDAC PIN to set the state of the LDAC pin
and USE PEC to select whether packet error checking is used
in the communications with the AD5421. There is also an
indicator item; PEC Error, this alerts to a packet error in the
data received from the AD5421. At the bottom of the window
is a display of the contents of the fault register, this is updated
on every communication with the AD5421 if Auto Fault
Readback is enabled.
Control Register
The DAC Register tab allows the user to program the DAC
register, offset adjust register, and gain adjust register.
Fault Register
The Fault Register tab allows the user to read the contents
of the fault register. The fault register can also be polled
continuously.
Program Loop Current
The Program Loop Current tab allows the user to program a
loop current value directly by entering the value in milliamps
after having first selected the loop current range that is set by
the Range0 and Range1 link options.
Command Write
The Control Register tab is displayed by default. This tab
allows the user to program the control register.
The Command Write tab allows the user to read/write all of the
AD5421s registers as well as issue commands.
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