Evaluation Board for 12-Bit, Parallel Input,
Dual-Channel, Current Output DAC
EVAL-AD5405EB
Rev. 0
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However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
FEATURES
Operates from dual ±12 V and +5 V supplies
On-board reference and output amplifiers
Direct hookup to printer port of PC
PC software for control of DAC
INTRODUCTION
This data sheet describes the evaluation board for the AD5405
DAC. The AD5405 is a CMOS 12-bit, current output digital-to-
analog converter (DAC). It operates from a 2.5 V to 5.5 V power
supply, making it suited to battery-powered and other
applications.
This DAC utilizes data readback, which allows you to read the
contents of the DAC register via the DB pins. On power-up, the
internal register and latches are filled with 0s and the DAC
outputs are at zero scale.
As a result of manufacture on a CMOS submicron process, the
AD5405 offers excellent 4-quadrant multiplication characteris-
tics, with large-signal multiplying bandwidths of up to 10 MHz.
The applied voltage reference determines the full-scale output
current. An integrated feedback resistor (RFB) provides tempera-
ture tracking and full-scale voltage output when combined with
an external I-to-V precision amplifier. In addition, this device
contains all the 4-quadrant resistors necessary for bipolar
operation and other configuration modes.
The evaluation board consists of the AD5405, three AD8065 op
amps, and a 10 V reference, ADR01. An external reference can
also be applied via an SMB input connector. Digital buffering is
supplied on-board. Note that, while excellent for dc perform-
ance, the bandwidth performance of the combined DAC and
amplifier is limited to approximately 8 MHz.
The evaluation kit includes a CD-ROM with self-installing
software to control the DAC. The software allows you to load
each DAC with a digital word and then read back the contents
of the input registers.
Full data on the DAC is available in the AD5405 data sheet,
which should be consulted in conjunction with this data sheet
when using the evaluation board.
EVALUATION BOARD FUNCTIONAL BLOCK DIAGRAM
CS VDD1VCC DGND VSSVDD AGND
36-WAY CENTRONICS
CONNECTOR
AD5405
12-BIT DAC
ADR01
REFERENCE
DATA
BUFFER
V
REF
A
V
OUT
A
DAC A
DAC B
AD8605
I TO V
V
OUT
B
AD8605
I TO V
V
REF
B
R/W
05214-001
Figure 1.
EVAL-AD5405EB
Rev. 0 | Page 2 of 8
TABLE OF CONTENTS
Operating the Evaluation Board..................................................... 3
Software Installation .................................................................... 3
Operating the Evaluation Software............................................ 3
Evaluation Board Schematic ........................................................... 4
Evaluation Board PCB Layers......................................................5
Ordering Information.......................................................................6
Bill of Materials..............................................................................6
Ordering Guide .............................................................................6
REVISION HISTORY
10/04—Revision 0: Initial Version
EVAL-AD5405EB
Rev. 0 | Page 3 of 8
OPERATING THE EVALUATION BOARD
The evaluation board requires ±12 V and +5 V supplies. The
+12 V VDD and −12 V VSS are used to power the output
amplifier, and the +5 V VDD1 is used to power the DAC. All
supplies are decoupled to ground with 10 µF tantalum and
0.1 µF ceramic capacitors.
SOFTWARE INSTALLATION
The evaluation kit includes self-installing software on a
CD-ROM. The software is compatible with Windows®
95/97/2000/NT/XP.
If the setup file does not run automatically, you can run the
setup.exe file from the CD-ROM.
OPERATING THE EVALUATION SOFTWARE
To operate the evaluation software:
1. Ensure that the centronics cable connects the PC to the
evaluation board.
2. Run the program file from the Analog Devices menu. The
AD5405 dialog box opens, as shown in Figure 2.
05214-002
Figure 2. AD5405 Dialog Box
3. Click the appropriate button to select either DAC A or
DAC B. The two DACs are configured differently. DAC A
is configured to give an output voltage range of 0 V to
−10 V; DAC B is configured to give an output voltage range
of −10 V to +10 V. The difference in output voltage range is
a result of the way in which the internal resistors are used.
4. In the Enter DAC Word (Hex) field, type a data-word to
the DAC. You must enter the 12-bit word in hexadecimal.
5. Press Enter on the keyboard to load the DAC and update
the selected output.
6. From the drop-down Printer Port menu, select the printer
port address from the list of available addresses.
EVAL-AD5405EB
Rev. 0 | Page 4 of 8
EVALUATION BOARD SCHEMATIC
V
REF
B
V
DD
V
SS
U3
C8
1.8pF
C7 10µF
C8 0.1µF
7
4
3
26
V–
V+
+
C9 10µF
C10 0.1µF
+
TP1
J1
V
OUT
A
V
DD
V
SS
U4
C17
1.8pF
C18 10µF
C19 0.1µF
7
4
3
26
V–
V+
+
C20 10µF
C21 0.1µF
+
TP2
J2
V
OUT
B
V
DD
V
SS
U5
C22 10µF
C23 0.1µF
7
4
3
2
6
V–
V+
+
C24
10µF
C25
0.1µF
+
AD8065AR
R3B
R2–3B
I
OUT
2B
I
OUT
1B
R
FB
B
R2B
R1B
V
REF
A
R3A
R2–3A
R2A
I
OUT
2A
I
OUT
1A
R1A
R
FB
A
CLR
CS
LDAC
R/W
DAC_A/B
40
1
38
39
2
3
4
5
30
29
31
33
32
28
27
26
V
DD
+V
IN
V
OUT
TRIM
GND
C3
10µF
C4
0.1µF
U2
ADR01AR
4
5
43
1
C4
0.1µF
LK2
LK3
V
REF
J8
V
IN
J10
A
B
V
REF
A
05214-003
C11
0.1µF
DGND C29
0.1µF
C30
0.1µF
C2
10µF
+
U1
AD5405
U6-A
V
DD
1
17
18
13
14
22
21
20
19
23
24
15
16
5
6
12
11
10
9
8
7
2
1
3
4
B5
B4
OEAB
LEAB
B0
B1
B2
B3
CEBA
B7
B6
A2
A3
GND
CEAB
A7
A6
A5
A4
OEBA
LEBA
A0
A1
5
6
12
11
10
9
8
7
2
1
3
4
B5
B4
OEAB
LEAB
B0
B1
B2
B3
CEBA
B7
B6
A2
A3
GND
CEAB
A7
A6
A5
A4
OEBA
LEBA
A0
A1
3
1
2A0
A1
V
CC
V
CC
VCC
V
CC
VCC
P1–31
P1–14
P1–8
P1–9
P1–36
P1–1
P1–7
P1–6
P1–5
P1–4
P1–3
P1–2
J3
U7
U8
74ABT543
74ABT543
74139
74139
17
18
13
14
22
21
11
12
9
10
5
4
7
6
20
19
23
24
15
16
DB021
25
6
DB120
DB714
DB813
DB912
DB1011
DB11
DAC_A/B10
CS22
CLR24
8
RW23
LDAC7
DB615
DB516
DB417
DB318
DB219
DGND
DB0
DGND
V
DD
DB1
DB7
DB8
DB9
DB10
DB11
DB6
DB5
DB4
DB3
DB2
EY3
Y2
Y1
Y0
U6-B
13
15
14A0
A1
EY3
Y2
Y1
Y0
P1–19
P1–20
P1–21
P1–22
P1–23
P1–24
P1–25
P1–26
P1–27
P1–28
P1–29
P1–30
C27
10
µ
F
C16
10
µ
F
C28
0.1
µ
F
C26
0.1
µ
F
P2–3
P2–2
P2–1
AGND
V
SS
V
DD
+
+
V
CC
LK1B
A
B
A
C12
10
µ
F
C14
10
µ
F
C13
0.1
µ
F
C15
0.1
µ
F
P2–4
V
DD
1
P2–6
P2–5
+
+
V
CC
C1
0.1
µ
F
+
J4
V
CC
LK4
Figure 3. Evaluation Board Schematic
EVAL-AD5405EB
Rev. 0 | Page 5 of 8
EVALUATION BOARD PCB LAYERS
05214-004
Figure 4. Component Placement Diagram
05214-005
Figure 5. Component-Side PCB Layer
05214-006
Figure 6. Solder-Side PCB Layer
EVAL-AD5405EB
Rev. 0 | Page 6 of 8
ORDERING INFORMATION
BILL OF MATERIALS
Table 1.
Qty Reference Designator Description Supplier/Number
1 U1 AD5405 DAC Analog Devices/AD5405
1 U2 ADR01 10 V Reference Analog Devices/
ADR01AUJ
3 U3, U4, U5 AD8065 Single Op Amp Analog Devices/
AD8065AR
1 U6 74HCT139 Dual 2- to 4-Line Decoder CD74HCT139M
2 U7, U8 74ABT543 Octal Transceiver Fairchild/74ABT543CMTC
16 C1, C4, C5, C8, C10, C11, C13, C15, C19, C21, C23,
C24, C26, C28, C29, C30
0.1 µF, X7R Ceramic Capacitor, 0603 Package FEC/499–675
12 C3, C7, C9, C12, C14, C16, C18, C20, C22, C25, C27 10 µF, 20 V Tantalum Capacitor FEC/197–427
1 C2 10 µF, 10 V Tantalum Capacitor FEC/197–130
2 C6, C17 1.8 pF Multilayer Ceramic Capacitor, 0603 Package FEC/721–876
6 J1, J2, J3, J4, J8, J10 SMB Socket FEC/310–682
2 LK1, LK4 3-Pin SIL Header with Shorting Block FEC/511–717 and 150–411
2 LK2, LK3 2-Pin SIL Header with Shorting Block FEC/511–705 and 150–411
1 P1 36-Pin 90° Centronics Connector FEC/147–753
1 P2 6-Pin Terminal Block FEC/151–792
20 VREFA, CLR, CS, DACA/B, DB0–DB11, RW, TP1,
TP2, LDAC
Testpoint (Red) FEC/240–435 (pack)
4 Rubber Stick-On Feet FEC/148–922
ORDERING GUIDE
Model Description
EVAL-AD5405EB Evaluation Board
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
EVAL-AD5405EB
Rev. 0 | Page 7 of 8
NOTES
EVAL-AD5405EB
Rev. 0 | Page 8 of 8
NOTES
© 2004 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05214–0–10/04(0)