Evaluation Board User Guide
UG-285
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
Evaluating the AD5544 Current Output/Serial Input DAC
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS. Rev. B | Page 1 of 12
FEATURES
Full-featured evaluation board for the AD5544
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
GENERAL DESCRIPTION
The AD5544 quad, 16-bit, current output, digital-to-analog
converter (DAC) is designed to operate in a 2.7 V to 5.5 V
supply range. But this voltage is limited up to 3.3 V due to
E VA L-SDP-CB1Z restrictions.
The applied external reference input voltage (VREFx) determines
the full-scale output current. Integrated feedback resistors
(RFBx) provide temperature-tracking, full-scale voltage outputs
when combined with an external I-to-V precision amplifier.
A double-buffered serial data interface offers high speed, 3-wire,
SPI- and microcontroller-compatible inputs using serial data in
(SDI), chip select (CS), and clock (CLK) signals. In addition, a
serial data out pin (SDO) allows for daisy-chaining when
multiple packages are used. A common, level-sensitive, load
DAC strobe (LDAC) input allows the simultaneous update of
all DAC outputs from previously loaded input registers.
Additionally, an internal power-on reset forces the output
voltage to 0 at system turn on. An MSB pin allows system reset
assertion (RS) to force all registers to zero code when MSB = 0
or to half-scale code when MSB = 1.
The AD5544 is packaged in a compact 28-lead SSOP.
The EV-AD5544/45SDZ board is used in conjunction with the
E VA L-SDP-CB1Z system demonstration platform (SDP) board
available from Analog Devices, Inc., which is purchased sepa-
rately from the evaluation board. The USB-to-SPI
communication to the AD5544 is completed using this
Blackfin®-based demonstration board. The software offers a
waveform generator.
FUNCTIONAL BLOCK DIAGRAM
AD5544
V
OUT
A
V
OUT
D
SDINSCLKCS SDO
LDAC
RS
MSB
I
OUT
D
USB
EVAL-SDP-CB1Z
GPIO
SPORT
V
REF
xI
OUT
A
ADR01
REFERENCE
AD8065
I-TO-V
AD8065
I-TO-V
09900-001
Figure 1.
UG-285 Evaluation Board User Guide
Rev. B | Page 2 of 12
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Evaluation Board Software .............................................................. 3
Installing the Software ................................................................. 3
Running the Software ...................................................................3
Using the Evaluation Board Software .............................................4
Example ..........................................................................................4
Evaluation Board Schematics and Artwork ...................................5
Evaluation Board Layout ..............................................................8
Related Links ......................................................................................9
REVISION HISTORY
5/13—Rev. A to Rev. B
Changed EVA L-AD5544/45SDZ to EV-AD5544/45SDZ
............................................................................................................ Universal
5/12—Rev. 0 to Rev. A
Changes to General Description Section ...................................... 1
Changes to Figure 2 .......................................................................... 3
Changes to Evaluation Board Schematics and Artwork Section ... 5
5/11—Revision 0: Initial Versi on
Evaluation Board User Guide UG-285
Rev. B | Page 3 of 12
EVALUATION BOARD SOFTWARE
09900-002
Figure 2. Device Manager Showing the SDP Board Connected
INSTALLING THE SOFTWARE
The EV-AD5544/45SDZ evaluation kit includes the software and
drivers on CD. To install the software, do the following:
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 EV-
AD5544/45SDZ evaluation kit CD.
3. Download the EV-AD5544/45SDZ 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 EV-AD5544/45SDZ 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/EV-
AD5544/45SDZ.
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.
09900-003
Figure 3.
UG-285 Evaluation Board User Guide
Rev. B | Page 4 of 12
USING THE EVALUATION BOARD SOFTWARE
Once the software is launched, the main window pops up (see
Figure 4).
09900-004
Figure 4. Main Window
The first step is to select the device to use that is connected
to the SDP board, in this case the AD5544, and click OK.
After selecting the device, the AD5544 evaluation software
window appears (see Figure 5) to start writing to the device.
09900-005
Figure 5. AD5544 Evaluation Software Window
The desired 16-bit data loads and updates one of the four DACs
that you selected within the AD5544 part.
There are two modes for loading the data. Synchronous mode
enables you to program each channel separately and update
them simultaneously. Program LDAC high, load the channels,
and finally pull LDAC low. Asynch-ronous mode enables you
to load and update each channel separately (the LDAC button
is ignored in this case).
The reset button, RS, updates all channel outputs to zero scale
or midscale when MSB is pulled low or high.
EXAMPLE
With LDAC and RS tied high for asynchronous loading mode,
specify quarter scale (0x4000, 16384d) in the Input Data box
and click Load and Update DAC A. The expected output
obtained is
V
D
VV
REF
OUT
5.2
536,65
384,16
10
536,65
−=×−=×−=
When you change the loading synchronism mode to synch-
ronous and write the value 0xC000 (49152d), you see no change
in the output until LDAC is tied low. The expected output for
this case is
V
D
VV
REF
OUT
5.7
536,65
152,49
10
536,65
−=×−=×−=
Evaluation Board User Guide UG-285
Rev. B | Page 5 of 12
EVALUATION BOARD SCHEMATICS AND ARTWORK
SCHEMATICS
VOUT A1
VO UT B1
SCLK1 SDIN1 /CS1
3
IOUTA 4
AGNDA
1
RFBA
2
VREFA
12
DGND
15 LDAC
16 SCLK
9SDIN
10 RS
11 CS
14 MSB
13
VDD
7
VREFB
8
RFBB
5
AGNDB
6
IOUTB
U2
AD5545CRUZ
/LDAC1 /RS1 MSB1 C9
5.6pF VOUTA1
+
C10
10uF
C11 0.1uF
+
C12 10uF
C13 0.1uF
J3
C14
5.6pF VOUTB1
+
C26
10uF
C31 0.1uF
+
C38 10uF
C39 0.1uF
J5
+
C27 10uF
C29 0.1uF 3+
2-
4
V-
7
V+ 6
U1
AD8065
3+
2-4
V-
7
V+ 6
U4
AD8065
DGND
SCLK
SDIN
/CS
/LDAC
/RS
MSB VDD
VSS
VDD
VSS
DVDD
DGND
VREFA
VREFB
09900-006
Figure 6. EV-AD5544/45SDZ Schematic Part A
UG-285 Evaluation Board User Guide
Rev. B | Page 6 of 12
Figure 7. EV-AD5544/45SDZ Schematic Part B
Evaluation Board User Guide UG-285
Rev. B | Page 7 of 12
VOUT A
VOUT B
VOUT C
VOUT D
+
C6
10uF
2
IOUTA 1
AGNDA
4
RFBA
3
VREFA
24
DGND
21 LDAC
9SCLK
10 SDIN
6RS
8CS
5MSB
7
VDD
12
VREFB
11
RFBB
14
AGNDB
13
IOUTB
26
VREFD
17
VREFC
27
IOUTD 28
AGNDD
25
RFBD
18
RFBC
15
AGNDC
16
IOUTC
23 NC
22 AGNDF
20 SDO
19 NC1
U5
AD5544
+
C16 10uF
C17 0.1uF
VREFA
+
C18
10uF
C19
0.1uF
C20
0.1uF
VREFB
C21
1.8pF VOUTA
3+
2-4
V-
7
V+ 6
U7
AD8065
+
C22
10uF
C23 0.1uF
+
C24 10uF
C25 0.1uF
C28
1.8pF VOUTB
3+
2-
4
V-
7
V+ 6
U8
AD8065
+
C30
10uF
C32 0.1uF
+
C33 10uF
C34 0.1uF
C35
1.8pF VOUTC
3+
2-4
V-
7
V+ 6
U9
AD8065
+
C36
10uF
C44 0.1uF
+
C45 10uF
C46 0.1uF
C47
1.8pF VOUTD
3+
2-4
V-
7
V+ 6
U6
AD8065
+
C48
10uF
C49 0.1uF
+
C50 10uF
C51 0.1uF
VREFC
VREFD
B
A
C
D
LK2
J13
J14
J15
J16
/CS
/LDAC
SDO
SCLK SDIN
/RS MSB
+
C4
10uF
+
C5
10uF
3+VIN
5TRIM
4
VOUT
2
GND
U3 ADR01BKSZ
J4-1
J4-2
C1
0.1uF
C2
0.1uF
C3
0.1uF
J1-1
J1-2
J1-3
DVDD
DVDD
VDD VDD
VSS
VDD
VSS
VSS
VDD
VDD
VSS
VDD
VSS
MSB
/RS
/LDAC
SDO
/CS
SDIN
SCLK
VREFA
VREFB
09900-008
Figure 8. EV-AD5544/45SDZ Schematic Part C
UG-285 Evaluation Board User Guide
Rev. B | Page 8 of 12
EVALUATION BOARD LAYOUT
09900-009
Figure 9. Silkscreen
09900-010
Figure 10. Component Side
Evaluation Board User Guide UG-285
Rev. B | Page 9 of 12
09900-011
Figure 11. Solder Side
RELATED LINKS
Resource Description
AD5545 Product Page, AD5545 Precision Dual 16-Bit DAC in Compact TSSOP Packages
AD5544 Product Page, AD5544 Quad, Current-Output, Serial-Input 16-Bit DAC
ADR01 Product Page, ADR01 Ultracompact, Precision 10.0 V Voltage Reference
AD8065 Product Page, AD8065 High Performance, 145 MHz FastFET™ Op Amp
EVAL-SDP-CB1Z Product Page, System Demonstration Platform
UG-285 Evaluation Board User Guide
Rev. B | Page 10 of 12
NOTES
Evaluation Board User Guide UG-285
Rev. B | Page 11 of 12
NOTES
UG-285 Evaluation Board User Guide
Rev. B | Page 12 of 12
NOTES
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions
set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you
have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc.
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
for the sole and exclusive purpose referenced above, and agrees not to use the Eva
luation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional
limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term
“Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including
ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may
not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to
promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board.
Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice
to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO
WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED
TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL
PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF
THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE
AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable
United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of
Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby
submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
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registered trademarks are the property of their respective owners.
UG09900-0-5/13(B)
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