ANALOG DEVICES UG-327 Service Manual
Evaluation Board User Guide
UG-327
One Technology Way • P. O . Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel : 781.329.4700 • Fax : 781.461.3113 • www.analog.com
V
V
V
V
V
OUT1
OUT2
OUT1
OUT2
OUT
Evaluating the AD5443, AD5446, and AD5453 Current Output/Serial Input DACs
FEATURES
Full-featured evaluation board for the AD5443, AD5446, and
AD5453
Graphic user interface software for board control and data
analysis
Connector to EVAL-SDP-CB1Z system demonstration
platform board
Various power supply options
APPLICATIONS
Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation
EVAL-SDP-CB1Z
USB
FUNCTIONAL BLOCK DIAGRAM
ADR01
REFERENCE
V
SDO
SDO
REF
AD5443
V
REF
AD5446
V
REF
AD5453
IOUT1
IOUT2
IOUT1
IOUT2
IOUT
SYNC
SCLK
SDI
SDO
SYNC
SCLK
SDI
SYNC
SCLK
SDI
SYNC
SCLK
SDI
GENERAL DESCRIPTION
The AD5443, AD5446 and AD54531 are CMOS 12-, 14-, and
14-bit, current output, digital-to-analog converters (DACs).
The AD5443 operates from a 3 V to 5.5 V power supply, while
the AD5446 and AD5453 operate from a single 2.5 V to 5.5 V
power supply. These devices are well suited for portable batterypowered and applications such as waveform generation and analog
processing.
Because of the CMOS submicron manufacturing process, these
parts offer excellent 4-quadrant multiplication characteristics of
10 MHz for the AD5443 and up to 12 MHz for the AD5446 and
AD5453 DACs.
These DACs use a double-buffered, 3-wire serial interface that
is compatible with SPI, QSPI™, MICROWIRE™, and most DSP
interface standards. On power-up, the internal shift register and
latches are filled with 0s, and the DAC output is at zero scale. In
addition for the AD5443 and AD5446, a serial data out pin
(SDO) allows for daisy-chaining when multiple packages are
used. Data readback allows the user to read the contents of the
DAC register via the SDO pin.
EVAL-AD5443/AD5446/AD5453SDZ
Figure 1.
The applied external reference input voltage (V
) determines
REF
the full-scale output current. An integrated feedback resistor
(R
) provides temperature tracking and full-scale voltage output
FB
when combined with an external current-to-voltage precision
amplifier.
The AD5443 and AD5446 are available in small 10-lead MSOP
packages, while the AD5453 is available in small 8-lead TSOT,
MSOP packages, also comes in 8-lead LFCSP.
The EVAL-AD5443SDZ/EVAL-AD5446SDZ/EVAL-AD5453SDZ
board is used in conjunction with the EVAL-SDP-CB1Z system
demonstration platform (SDP) board available from Analog
Devices, Inc., which is purchased separately from the evaluation
board. The USB-to-SPI communication to the DAC is completed
using this Blackfin®-based demonstration board.
10226-001
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 12
UG-327 Evaluation Board User Guide
TABLE OF CONTENTS
Features.............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Evaluation Board Software.............................................................. 3
Installing the Software ................................................................. 3
Running the Software .................................................................. 3
REVISION HISTORY
4/12—Revision 0: Initial Version
Using the Evaluation Board Software .............................................4
Example 1 .......................................................................................4
Example 2 .......................................................................................4
Example 3 .......................................................................................5
Evaluation Board Schematics and Artwork...................................6
Schematics......................................................................................6
Evaluation Board Layout ........................................................... 10
Related Links............................................................................... 11
Rev. 0 | Page 2 of 12
Evaluation Board User Guide UG-327
EVALUATION BOARD SOFTWARE
Figure 2. Device Manager Showing the SDP Board Connected
10226-002
INSTALLING THE SOFTWARE
The EVAL-AD5443SDZ/EVAL-AD5446SDZ/EVAL-AD5453SDZ
evaluation kit includes the software and drivers on CD. To install
the software, follow these steps:
1. Install the software before connecting the SDP board to the
USB port of the PC.
2. Start the Windows® operating system and insert the
EVAL-AD5443SDZ/EVAL-AD5446SDZ/EVAL-AD5453SDZ
evaluation kit CD.
3. Download the EVAL-AD5443SDZ/EVAL-AD5446SDZ/
EVAL-AD5453SDZ LabVIEW™ software. The correct driver,
SDPDriversNET, for the SDP board should download
automatically after LabVIEW is downloaded, supporting
both 32- and 64-bit systems. However, if the drivers do not
download automatically, the driver executable file can also be
found in the Program Files/Analog Devices folder. Follow
the on-screen prompts to install it.
4. After installation of the software and drivers is complete,
plug the EVAL-AD5443SDZ/EVAL-AD5446SDZ/EVAL-
AD5453SDZ into the SDP board and the SDP board into
the PC using the USB cable included in the box.
5. When the software detects the evaluation board, proceed
through any dialog boxes that appear to finalize the
installation (Found New Hardware Wizard/Install the
Software Automatically and so on).
RUNNING THE SOFTWARE
To run the evaluation board program, do the following:
1. Click Start/All Programs/Analog Devices/EVAL-
AD5443SDZ/EVAL-AD5446SDZ/EVAL-AD5453SDZ).
2. If the SDP board is not connected to the USB port when
the software is launched, a connectivity error displays (see
Figure 3). Simply connect the evaluation board to the USB
port of the PC, wait a few seconds, click Rescan, and follow
the instructions.
Figure 3. Connectivity Error (see Step 2)
10226-003
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UG-327 Evaluation Board User Guide
USING THE EVALUATION BOARD SOFTWARE
Once the software is launched, the main window pops up (see
Figure 4).
10226-007
10226-004
Figure 4. Main Window
Figure 7. AD5453 Evaluation Software Window
EXAMPLE 1
Select the AD5453 part from the main window. Tick 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
light indicating the actual functionality mode (see Figure 5).
Enter Data 0x2000 (half scale) in the Input Data control and
click the Writ e 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.
D
VV
REF
n
2
Figure 5. AD5443 Evaluation Software Window
OUT
10226-005
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 Wri te 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.
D
VV
OUT
REF
n
2
Write Data 0x1000 (quarter scale) to the DAC. The output changes
its voltage from −10 V to −2.5 V, and the previous data written
to the part will appear on the SDO pin (in this example, −10 V).
D
VV
OUT
10226-006
Figure 6. AD5446 Evaluation Software Window
To finish evaluating the part, push the
To disable daisy-chain mode, tick the
Main Window after launching the application and before
in the
clicking the
Disabled
Rev. 0 | Page 4 of 12
REF
n
2
OK button. The LED indicator with the Daisy-chain
label will be light indicating the functionality mode.
10
10
10
8,192
16,384
383,16
384,16
383,16
384,16
V5
−=×−=×−=
−=×−=×−=
V
10
−=×−=×−=
V
10
STOP button.
Disable Daisy-chain box
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