AD5664R Evaluation Board (EVAL-AD5664REB) PDF

Evaluation Board for Quad, 16-Bit,
Serial Input, Voltage Output DAC
EVAL-AD5664REB
FEATURES
The on-chip reference is off at power-up allowing for the use of
an external reference. The REF195 is used on this evaluation
board. The part must be written to after power-up to turn on
the internal reference.
Full featured evaluation board for the AD5664R
Allows evaluation of the AD5664 part
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
Refer to the AD5664R data sheet available for full data on the
part. Consult the AD5664R data sheet in conjunction with this
data sheet when using the evaluation board.
This board can also be used to evaluate the AD5664 part. Refer
to the AD5664 data sheet for complete data on the part.
GENERAL DESCRIPTION
This data sheet describes the evaluation board for the AD5664R
quad, 16-bit DAC. The AD5664R operates from a single 2.7 V
to 5.5 V supply. The part incorporates an internal 1.25 V or
2.5 V on-chip reference to give an output voltage span of 2.5 V
or 5 V, respectively.
The evaluation board interfaces to the USB port of an IBM®compatible PC. Software is available with the evaluation board
that allows the user to easily program the AD5664R.
FUNCTIONAL BLOCK DIAGRAM
POWER SUPPLY INPUTS
EXT REF IN/
INT REF OUT
5V VOLTAGE
REFERENCE
USB CONNECTOR
SMB CONNECTORS
VREFIN/VREFOUT
VOUTA
VOUTB
CONTROLLER
I/O
AD5664R
ADG738
8:1 MUX
ADC
CY7C68013
06087-001
VOUTD
NOTES
1. ADDITIONAL PINS OMITTED CLARITY.
Figure 1.
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards as supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. 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. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
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.
EVAL-AD5664REB
TABLE OF CONTENTS
Features .............................................................................................. 1
Software Installation and Startup................................................4
General Description ......................................................................... 1
Software Operation .......................................................................4
Functional Block Diagram .............................................................. 1
Reference Setup .............................................................................4
Revision History ............................................................................... 2
Schematics ..........................................................................................6
Evaluation Board Hardware ............................................................ 3
Ordering Information.................................................................... 10
Power Supplies .............................................................................. 3
Component Listing .................................................................... 10
Link Options ................................................................................. 3
Ordering Guide .......................................................................... 10
Evaluation Board Software .............................................................. 4
ESD Caution................................................................................ 10
REVISION HISTORY
9/06—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
EVAL-AD5664REB
EVALUATION BOARD HARDWARE
POWER SUPPLIES
LINK OPTIONS
To power the AD5664R evaluation board, supply 5.5 V between
the AVDD and AGND inputs for the analog supply of the
AD5664R (J6). Alternatively place Link 6 in Position B,
powering the analog circuitry from the USB port (default
setting).
A number of link and switch options on the evaluation board
should be set for the required operating setup before using the
board. The functions of these link options are described in
detail in Table 2. The default setup is for control by the PC via
the USB port. The default link options are listed in Table 1.
Both AGND and DGND inputs are provided on the board. The
AGND and DGND planes are connected at one location close
to the AD5664R. To avoid ground loop problems, it is
recommended that the user does not connect AGND and
DGND elsewhere in the system.
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.
Table 1. Link Options Setup for PC Control (Default)
Link No.
LK1 to LK4
LK5
LK6
LK7
LK8
LK9
LK10
LK11
LK12
LK13
Option
Inserted
B
B
A
A
B
Removed
B
Not applicable
A
Table 2. Link Options
Link No.
LK1 to LK4
LK5
LK6
LK7
LK8
LK9
LK10
LK11
LK12
LK13
Function
This link connects the VOUTA pin to the VOUTD pin of the AD5664R to the input pins of the ADG738 demultiplexer so that the
DAC output value can be monitored using the on-board AD7476 ADC.
This link selects the AVDD power supply source for the analog circuitry.
•
Position A selects J6 as the AVDD analog circuitry power supply source.
•
Position B selects the 5 V power supply source as the AVDD analog circuitry power supply source (see LK6).
This link selects the 5 V power supply source for the digital circuitry.
•
Position B selects the USB port as the 5 V digital circuitry power supply source.
•
Position A selects J7 as the 5 V digital circuitry power supply source.
This link selects whether the AD5664R evaluation board is controlled by the PC via the USB port or by an external source via
the SMB connectors J1to J5.
•
Position A selects control by the PC via the USB port.
•
Position B selects control by an external source via the SMB connectors J1 to J3.
This link sets the RESET pin on the ADG738.
•
Position A allows normal operation of the switch.
•
Position B resets the switch.
This link selects the AVDD power supply source for the REF195.
•
Position A selects J6 as the REF195 power supply source.
•
Position B selects the AVDD as the REF195 power supply source (see LK5).
This link connects a 0.1 μF capacitor to AGND on the VREFOUT pin. It is recommended to connect this when using the internal
reference.
This link selects the reference source.
•
Position A selects the internal reference as the reference source. The part must be written to via software to turn on the
internal reference.
•
Position B selects the on-board REF195 5 V reference as the reference source.
Not applicable.
This link selects the DAC voltage source.
•
Position A selects the AVDD analog circuitry power supply source.
•
Position B selects the on-board REF195 5 V reference as the power supply source.
Rev. 0 | Page 3 of 12
EVAL-AD5664REB
EVALUATION BOARD SOFTWARE
SOFTWARE INSTALLATION AND STARTUP
The AD5664R evaluation board kit includes self-installing
software CD. 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-ROM drive.
Install the software before connecting the evaluation board to
the PC’s USB port to ensure that the evaluation board is
correctly recognized when connected to the PC.
To select a command with which to program the part, click the
appropriate button under Command Bits. For example, to
program all DAC outputs with full scale:
1.
Under Command Bits, click Write to and Update DAC
channel n.
2.
Under Address Bits, click All DACs.
3.
Under Data Bits, either type the data in hex format or in
voltage.
4.
Click Write to Part to execute all writes to the part.
After the installation has completed power up the AD5664R
evaluation board as described in the Power Supplies section.
Then, connect it to the PC’s USB port using the supplied cable.
The voltage output on each DAC channel is monitored using
the on-board ADC. To read the output voltage click Sample
under the ADC section in the upper right of the window.
Once the software detects the evaluation board, proceed
through any dialog boxes that appear to finalize the installation.
The AD5664R evaluation board lets you program the power
down DAC bits, the clear code register bits, and the LDAC
register bits by clicking on the corresponding button under the
Command Bits sections and clicking Write to Part. You can also
program the register bits for the required mode of operation.
Refer to the AD5664R data sheet for further information.
SOFTWARE OPERATION
From the Analog Devices menu, click Start > All Programs >
Analog Devices >AD5664R >AD5664R Evaluation Software.
REFERENCE SETUP
For older PCs, click Start > Programs > Analog Devices
>AD5664R >AD5664R Evaluation Software.
The AD5664R Evaluation Software dialog box opens, as shown
in Figure 2. The data programmed into the 24-bit input shift
register is displayed. You can select the command bits, the
address bits, and the data bits by clicking the appropriate button
under each area.
The AD5664R internal reference is off at power-up by default,
allowing the use of an external reference. To turn on (or off) the
internal reference click REF Setup Register under Command
Bits. This allows the user to program the bit in the reference
setup register for the required mode of operation. as shown in
Figure 3. Then click Write to Part.
Rev. 0 | Page 4 of 12
06087-002
EVAL-AD5664REB
06087-003
Figure 2. AD5664R Dialog Box
Figure 3. AD5664R Dialog Box, Reference Setup
Rev. 0 | Page 5 of 12
EVAL-AD5664REB
06087-004
SCHEMATICS
Figure 4. Schematic of Controller Circuitry
Rev. 0 | Page 6 of 12
06087-005
EVAL-AD5664REB
Figure 5. Schematic of AD5664R Circuitry
Rev. 0 | Page 7 of 12
06087-006
EVAL-AD5664REB
06087-007
Figure 6. Component Placement Drawing
Figure 7. Component Side PCB Drawing
Rev. 0 | Page 8 of 12
06087-008
EVAL-AD5664REB
Figure 8. Solder Side PCB Drawing
Rev. 0 | Page 9 of 12
EVAL-AD5664REB
ORDERING INFORMATION
COMPONENT LISTING
Table 3.
Qty
1
1
1
1
1
1
1
1
1
8
1
1
1
1
5
1
2
22
1
1
4
1
4
1
2
2
1
1
5
7
18
Reference Designator
U1
U2
U3
U4
U5
U6
U7
U8
Y1
VOUTA to VOUTD; J1 to J3, J11
J10
J6
J7
D1
C4, C5, C11, C18, C35
C37
C26, C27
C2, C3, C6 to C9, C12, C17, C19 to
C23, C25, C28 to C34, C36
C24
C10
C13 to C16
R1
R2 to R5
R6
R7, R8
R11, R12
R10
R9
LK1 to LK4, LK10
LK5 to LK9, LK11, LK13
TP1 to TP18
Description
AD5664RBRMZ-5
ADG774BRQZ
REF195ESZ
AD7476ARTZ (ADC)
ADG738BRUZ
ADP3303ARZ-3.3
CY7C68013-CSP
24LC01
24 MHz crystal
Gold 50 Ω SMB jack
USB mini B
Power connectors
Power connectors
LED
10 μF 10 V tantalum cap (TAJ-B package)
10 μF 20 V tantalum cap (TAJ-B package)
22 pF (0603 package)
0.1 μF (0603 package)
Supplier/Number
Analog Devices
Analog Devices
Analog Devices
Analog Devices
Analog Devices
Analog Devices
Embassy CY7C68013-56LFC
FEC 975-8070
FEC 569-872
FEC 365 1228
FEC 476-8309
FEC 151-786
FEC 151-785
FEC 359-9681
FEC 197-130
FEC 197-427
FEC 722-005
FEC 882-0023
2.2 μF (0603 package)
1 μF (0603 package)
0805 package (not inserted)
1.5 Ω
Wire-wrap pin (not inserted)
1 kΩ (0603 package)
100 kΩ (0603 package)
2.2 kΩ (0603 package)
10 kΩ (0603 package)
0 (0603 package)
Header (2 × 1 pin)
Header (3 × 1 pin)
Test point
Digikey 490-1552-1-ND
FEC 318-8840
ORDERING GUIDE
Model
EVAL-AD5664REB
Package Description
AD5664R Evaluation Board Kit
ESD CAUTION
Rev. 0 | Page 10 of 12
FEC 758-267
FEC 911-239
FEC 911 471
FEC 911-276
FEC 911-355
FEC 772-227
FEC 511-705
FEC 511-717
FEC 873-1144
EVAL-AD5664REB
NOTES
Rev. 0 | Page 11 of 12
EVAL-AD5664REB
NOTES
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
EB06087-0-9/06(0)
Rev. 0 | Page 12 of 12
Similar pages