EVAL-AD5590
Rev. 0 | Page 5 of 8
EVALUATION BOARD SOFTWARE
USING THE USB SOFTWARE
The evaluation board kit comes supplied with a CD containing
PC software that allows you to control the evaluation board via
the USB interface.
1. The software must be installed before the evaluation board
is connected to the USB port.
2. The software installation program runs automatically when
the CD is inserted in the drive. If this does not happen,
double-click SETUP.EXE in the root directory of the CD to
install the software and to add shortcuts on the Start menu
under Analog Devices.
3. When the software is installed, connect the evaluation
board to the USB port.
When you start the software, it checks for the presence of an
evaluation board. If a board is not found, a dialog box appears
indicating this. The software can be used without the evaluation
board. This can be useful for a system designer because the
software shows the values that need to be written to the DAC or
ADC interface to carry out the required function. Figure 2
shows the main window of the software.
The software has a tabbed section at the bottom of the window.
This is divided into four tabs: DAC0 to DAC7, DAC8 to
DAC15, ADC, and Misc. The DAC tabs are used to select the
internal or external references, clear codes, power modes, and
software
LDAC
selections for both blocks of DACs. Because
both DAC blocks have an internal reference, either one can be
used as the system reference for the other DAC block and the
ADC. Take care that both references are not on at the same time
if they are connected together via LK16.
The ADC tab is used to select the weak/three-state condition of
the ADOUT line (see the AD5590 data sheet for details about
this functionality) and the ADC input range.
The Misc tab is used to set the state of
LDAC
and
CLR
. Addition-
ally, specific data can be sent to the DACs and the ADC to
perform functions that are not handled by the software.
WRITING TO THE DACS
The 12-bit hexadecimal values that are to be loaded to the
DACs are entered in the 16 text boxes at the top of the window.
Each DAC channel has a check box associated with the input
register and another associated with the software update of the
DAC register. If the input register check box is selected, the value
is loaded to the appropriate input register when the Load Input
Register button is clicked. If the check box is not selected, the
value is ignored. After the input registers have been updated, the
LDAC
is pulsed if selected in the Options menu. Clicking the
Update DAC Register button issues an individual software
LDAC
for any channel selected.
READING FROM THE ADCS
There are two options when reading from the ADC. Clicking
the Read ADC button reads all 16 channels and displays the
12-bit results as either hexadecimal or decimal values.
Clicking the Read & Save ADC button reads and saves to file
512 conversion results on each channel. These samples are not
necessarily equidistant because the timing of the software writes
depend on the Windows® operating system.
07942-002
Figure 2. AD5590 Evaluation Software, Main Window
