Single-Channel, 12-/14-/16-Bit, Serial Input,
Voltage Output DAC Evaluation Board
EVAL-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. 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: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved.
FEATURES
Full featured evaluation board for
AD5662
AD5660
AD5640
AD5620
On-board reference
On-board ADC for voltage readback
Various link options
Direct hook up to USB port of PC
PC software for control of DACs
GENERAL DESCRIPTION
This data sheet describes the evaluation board for the 12-bit
AD5620, 14-bit AD5640, 16-bit AD5660, and 16-bit AD5662
single-channel DACs.
The AD5620/AD5640/AD5660 have a maximum output voltage
span of 5 V derived from an internal on-chip reference voltage
of 2.5 V.
The AD5662 has a maximum output voltage span of 5 V
derived from an external reference voltage of 5 V. The reference
voltage for this evaluation board is derived from the AD780
which has an output voltage of 2.5 V or 3 V. Therefore, for
purpose of this evaluation, 3 V is the maximum output voltage
span of the AD5662 using the AD780 reference.
When using the evaluation board, refer to this data sheet along
with the data sheets for the AD56xx family of parts available
from Analog Devices, Inc.
The evaluation board interfaces to the USB port of an IBM-
compatible PC. The software available with the evaluation
board allows the user to easily program the AD56xx .
EVAL-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0 | Page 2 of 12
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Operating the AD56XX Evaluation Board..................................... 3
Power Supplies .............................................................................. 3
Link Options ................................................................................. 3
Evaluation Board Software .............................................................. 4
Software Installation .................................................................... 4
Software Operation.......................................................................4
Schematics ..........................................................................................5
Ordering Information.......................................................................9
Component Listing .......................................................................9
Ordering Guide .............................................................................9
ESD Caution...................................................................................9
REVISION HISTORY
6/06—Revision 0: Initial Version
EVAL-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0 | Page 3 of 12
OPERATING THE AD56XX EVALUATION BOARD
POWER SUPPLIES
The AD56xx evaluation board can be powered from the USB
port. This is the default setup. It can also be powered by an
external supply using the J6 and J7 power connectors.
Both analog GND and DGND inputs are provided on the
board. The analog GND and DGND planes are connected at
one location close to the AD56xx. It is recommended not to
connect analog GND and DGND elsewhere in the system to
avoid ground loop problems.
Each supply is decoupled to the relevant ground plane with
10 μF and 0.1 μF capacitors. Each device supply pin is also
decoupled with a 10 μF and 0.1 μF capacitor pair to the relevant
ground plane.
LINK OPTIONS
A number of link and switch options on the evaluation board
should be set for the required operating setup before using the
board. Table 1 lists the default link options. The functions of
these link options are described in detail in Tab le 2. The default
setup is for control by the PC via the USB port.
Table 1. Link Options Setup for PC Controls
Link No. Option (Default)
LK1 INSERTED
LK2 A
LK3 REMOVED
LK4 A (AD5620/AD5640/AD5660)
B (AD5662 only)
LK5 B
LK6 B
LK7 INSERTED (AD5620/AD5640/AD5660)
REMOVED (AD5662 only)
LK8 INSERTED
LK9 INSERTED
Table 2. Link Options
Link No. Function
LK1 This link connects the VFB pin to the VOUT pin of the AD56xx.
LK2 This link selects whether the AD56xx evaluation board is controlled by the PC via the USB port or by an external source via the
J1, J3, and J4 SMB connectors.
• Position A: The evaluation board is controlled by the PC via the USB port.
• Position B: The evaluation board is controlled by an external source via the J1, J3, and J4 SMB connectors.
LK3 This link connects external resistors and capacitor loads to the VOUT pin of the AD56xx.
LK4 This link selects the reference source.
• Position A: The internal reference is the reference source (AD5660/AD5640/AD5620).
• Position B: The on-board 2.5 V/3 V AD780 reference is the reference source (AD5662 only).
LK5 This link selects the AVDD power supply source for the analog circuitry.
• Position A: J6 is the AVDD analog circuitry power supply source.
• Position B: The USB 5 V power supply is the AVDD analog circuitry power supply source.
LK6 This link selects the DVDD power supply source for the digital circuitry.
• Position A: J7 is the DVDD digital circuitry power supply source.
• Position B: The USB 5 V power supply source is the digital circuitry power supply source.
LK7 This link connects a 0.1 μF capacitor to GND on the VREF output pin of the device (AD5620/AD5640/AD5660).
LK8 This link connects the OP_SEL pin of the AD780 reference to ground, selecting a 3 V output. Leaving no connect gives a
2.5 V output.
LK9 This link connects the VOUT pin of the AD56xx to the VIN pin of the AD7476 ADC so that the DAC output value can be monitored
using the on-board ADC.
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EVALUATION BOARD SOFTWARE
SOFTWARE INSTALLATION
The AD56xxEB evaluation kit includes self-installing software
on CD-ROM. The software is compatible with Windows® 2000
and Windows® XP.
If the setup file does not run automatically when you insert the
CD, run the setup.exe file directly from the CD.
Install the software before connecting the evaluation board to
the USB port to ensure that the evaluation board is correctly
recognized when connected to the PC.
1. After the installation from the CD-ROM has completed,
connect the AD56xx evaluation board to the USB port
using the cable supplied.
2. The software detects the evaluation board. Follow the
instructions on the dialog boxes that appear to complete
the installation.
SOFTWARE OPERATION
1. From the Analog Devices menu, select Start > All
Programs > Analog Devices >AD5620-40-60-62
>AD56xx Evaluation Software.
For older PCs, click Start > Programs > Analog Devices >
AD5620-40-60-62 >AD56xx Evaluation Software.
The Device Selection dialog box opens, as shown in Figure 1.
05540-002
Figure 1. Device Selection Dialog Box
2. Select a part number and click OK. The main window
opens, as shown in Figure 2.
05540-003
Figure 2. Main Window
3. To program the DAC, type the data word in the HEX field of
the Enter Data Word section. Then click Program DAC.
4. To read back the output voltage using the on-board ADC,
click Read Voltage.
The DAC output voltage for the AD5662 is given by
⎟
⎠
⎞
⎜
⎝
⎛
×= 65536
D
VREFVOUT
For the AD5620/AD5640/AD5660 parts, the DAC output
voltage is calculated as
⎟
⎠
⎞
⎜
⎝
⎛
××= N
OUT
D
VREFV
2
2
where N = 12 for the AD5620, 14 for the AD5640, and 16
for the AD5660.
5. From the Choose Power Down Option, select one of the
following:
• 1K to Gnd
• 100 K to Gnd
• Three State
After selecting an option, the AD56xx powers down and the
output goes to zero. To resume operation, select Normal
Operation.
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Rev. 0 | Page 5 of 12
SCHEMATICS
RESET
*WAKEUP
CLKOUT
D–
D+
PA0/ INT0
PA1/ INT1
PA2/ *SLOE
PA3/ *W U2
PA4/FIFOADR0
PA5/FIFOADR1
PA6/ *PKTEND
PA7/ *F LD/SL CS
RDY0/*SLRD
RDY1/*SLWR
IFCLK
RSVD
AVC C
PB0/FD0
PB1/FD1
PB2/FD2
PB3/FD3
PB4/FD4
PB5/FD5
PB6/FD6
PB7/FD7
PD0/FD8
PD1/FD9
PD2/FD10
PD3/FD11
PD4/FD12
PD5/FD13
PD6/FD14
PD7/FD15
CTL0/*FLAGA
CTL1/*FLAGB
CTL2/*FLAGC
SDA
SCL
XTALOUT
XTALIN
U8
CY7C68013-CSP
55433227171173
VCC
VCC
VCC
VCC
VCC
VCC
VCC
AGND
GND
GND
GND
GND
GND
GND
GND
R9
0R
3.3V
C17
22pF
0603
R5
100kΩ
3.3V
C18
22pF
0603
R7
100kΩ
3.3V
J10
USB-MINI-B
VBUS
D–
D+
IO
GND
SHIELD
DIN
SCLK
SYNC
ADC_CS
R18
10kΩ
42
44
54
9
8
33
34
35
36
37
38
39
40
1
2
13
14
106 122628415356
18
19
20
21
22
23
24
25
45
46
47
48
49
50
51
52
29
30
31
16
15
4
5
C15
22pF
0603
C16
22pF
0603
Y1
24MHz
ADC_SDATA
3.3V
A0
A1
A2
VSS
VCC
WP
SCL
SDA
U6
24LC01
1
2
3
4
8
7
6
5
3.3V 3.3V
R4
22kΩ
R3
22kΩ
C36
22pF
C35
22pF
C34
22pF
C33
22pF
C32
22pF
C30
22pF
C28
22pF
3.3V
1
2
3
4
5
05540-004
DGND
DGND DGND
C21
22pF
0603
C25
2.2pF
DGND
DGND DGND
3.3
V
C20
22pF
0603
C7
10µF
DGND
+
TP20 TP19
DGND DGND
3.3V
TP18 TP17
TP15 TP16
DGND
USB_5V
ADP3303-3.3
8
7
5
1
2
6
3
3.3V
U7
GND
4
C22
22pF
0603
C24
10µF
AK
LED
R6
1kΩ
C19
22pF
0603
C23
22pF
0603
D2
OUT1
OUT2
ERROR
NR
IN1
IN2
SD
+
DGND
DGND
DGND
DGND
Figure 3. Schematic of Controller Circuitry
EVAL-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0 | Page 6 of 12
0
5540-005
J2
SCLK
DIN
SYNC
VFB VDD
VREF
VOUT
GND
U1
AD5660BRM
6
7
5
8
31
2
4
3 6 10 13
S1B
S2B
S3B
S4B
S1A
S2A
S3A
S4A
D1
D2
D3
D4
V
DD
IN GNDEN
U9
ADG774
16
2
5
11
14
4
7
9
12
115 8
DVDD
LK2
AB
DVDD
SCLK
DIN
SYNC
SCLK
J1
DIN
J3
SYNC
J4
DGND DGND DGND
TP5 TP6TP4
SCLK
DIN
SYNC
VFB VDD
VREF
VOUT
GND
U5
AD5660BRJ
6
7
5
8
31
2
4
C6
0.1µF
AVDD
TP7
TP10
DAC_VOUT
LK9
LK3
TP1
C1
200pF
R1
R2
0Ω
LK7
C14
0.1µF
TP2
AVDD
LK4
LK1
AB
J5
TP12
VREF TP11
C8
10µF
+
LK8
VOUT
OP_SEL
+VIN
TEMP
GND
U4
AD780
6
8
4
2
3
C9
10nF
C10
1µF
J8
C13
0.1µF
AD7476_ADC
U3
GND
VDD
VIN
SCLK
SDATA
CS
TP9
TP8
4
5
6
2
3
TP3
SCLK
ADC_SDATA
ADC_CS
DAC_VOUT
C11
10µF
C12
0.1µF
+
AVDD
C37
22pF
0603
DVDD
TP13 TP14
USB_5V
LK6
AB
J7-1
J7-2 C5
22pF
0603
C4
10µF
+
DGND
DVDD
L2
BEAD R8
1R5 LK5
BA
AVDD
C2
22pF
0603
C3
10µF
+
J6-1
J6-2
DVDD
DGND
AVDD
AGND
1
Figure 4. Schematic of AD56xx Circuitry
EVAL-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0 | Page 7 of 12
05540-006
Figure 5. Component Placement Drawing
05540-007
Figure 6. Component Side PCB Drawing
EVAL-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0 | Page 8 of 12
05540-008
Figure 7. Solder Side PCB Drawing
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Rev. 0 | Page 9 of 12
ORDERING INFORMATION
COMPONENT LISTING
Table 3.
Qty Reference Designator Description Supplier/Number
1 U1 AD56xxBRM—MSOP-8 Analog Devices, Inc.
1 U5 AD56xxBRJ—SOT-23-8 Analog Devices, Inc.
1 U3 AD7476ART (ADC) TAnalog Devices, Inc.
1 U4 AD780 Analog Devices, Inc.
1 U6 24LC01 Digikey 24LC64-I/SN-ND
1 U7 ADP3303AR-3.3 Analog Devices, Inc.
1 U8 CY7C68013-CSP CY7C68013-56LFC
1 U9 ADG774BRQ Analog Devices, Inc.
1 Y1 24 MHz crystal FEC 569-872
1 C1 200 pF (0603 package) FEC 422-6811
6 C3, C4, C7, C8, C11, C24 10 μF tantalum cap (TAJ-A package) FEC 197-130
4 C6, C12, C13, C14 0.1 μF multilayer ceramic cap FEC 422-6859
1 C9 10 nF (0603 package) FEC 422-6938
1 C10 1 μF (0805 package) FEC 318-8899
19 C2, C5, C15 to C23, C28, C30, C32 to C37 22 pF (0603 package) FEC 722-005
1 C25 2.2 μF (0603 package) Digikey 490-1552-1-ND
1 D2 LED FEC 359-9681
1 J10 USB Mini B FEC 476-8309
6 J1 to J5, J8 Gold 50 Ω SMB jack FEC 310-682
1 L2 Bead FEC 581-094
2 J6, J7 Power connectors FEC 151-785
5 LK1, LK3, LK7 to LK9 Header (2 × 1 pin) FEC 511-705
4 LK2, LK4 to LK6 Header (3 × 1 pin) FEC 512-047
1 R1 R1 (not inserted)
2 R2 0 Ω (0805 package) FEC 772-239
R9 0 Ω (0603 package) FEC 772-227
2 R3, R4 22 kΩ (0603 package) FEC 911-276
2 R5, R7 100 kΩ (0603 package) FEC 911-471
1 R18 10 kΩ (0603 package) FEC 911-975
1 R6 1 kΩ (0603 package) FEC 911-239
1 R8 1.5 Ω FEC 758-267
19 TP1 to TP20 Testpoint FEC 240-333
ORDERING GUIDE
Model Description
EVAL-AD5620EB Evaluation Board Kit
EVAL-AD5640EB Evaluation Board Kit
EVAL-AD5660EB Evaluation Board Kit
EVAL-AD5662EB Evaluation Board Kit
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-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0 | Page 10 of 12
NOTES
EVAL-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0 | Page 11 of 12
NOTES
EVAL-AD5620EB/EVAL-AD5640EB/EVAL-AD5660EB/EVAL-AD5662EB
Rev. 0 | Page 12 of 12
NOTES
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
EB05540-0-6/06(0)
