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EVAL-AD5676RSDZ

P1-P3P4-P6P7-P9P10-P12
UG-814 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide
GETTING STARTED
INSTALLING THE SOFTWARE
The evaluation kit for the AD5676/AD5676R includes self-
installing software on the CD. The software is compatible with
Windows® X P, Windows Vista (32-bit), and Windows 7 (32-bit
and 64-bit).
The software must be installed before connecting the SDP-B
board to the USB port of the PC to ensure that the SDP-B board
is recognized when it connects to the PC.
To install the software, take the following steps:
1. Start the Windows operating system and insert the CD.
2. The installation software should open automatically. If it
does not open automatically, run the setup.exe file from
the CD.
3. After installation is complete, power up the evaluation
board as described in the Power Supplies section.
4. Connect the evaluation board to the SDP-B board and
connect the SDP-B board to the PC using the USB cable
included in the kit.
5. When the software detects the evaluation board, proceed
through any dialog boxes that appear to finalize the
installation.
EVALUATION BOARD SETUP PROCEDURES
To set up the evaluation board, take the following steps:
1. Connect the evaluation board to the SDP-B board and
connect the USB cable between the SDP-B board and the PC.
2. Power the SDP-B and evaluation boards by connecting
6 V dc to the J3 connector.
Rev. 0 | Page 4 of 12
EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide UG-814
EVALUATION BOARD HARDWARE
POWER SUPPLIES
To use the evaluation board with the SDP-B board, a 6 V dc
power supply is required, which is connected to Connector J3.
The evaluation board can be used without the SDP-B board. In
this case, the J1 and J2 connectors are used as the power supply
inputs.
Both AGND and DGND inputs are provided on the board. The
AGND and DGND planes are connected at one location close
to the AD5676/AD5676R. It is recommended that AGND and
DGND not be connected elsewhere in the system to avoid
ground loop problems.
All supplies are decoupled to ground with 10 µF tantalum and
0.1 µF ceramic capacitors.
Table 1. Power Supply Connectors
Connector Number Voltage
J1
External, V
LOGIC
supply
J2 Analog power supply, V
CC
J3 6 V dc board positive power supply
INPUT SIGNALS
When the SDP-B board controls the evaluation board, the
digital input signals are applied to Connector J4. When the
SDP-B board is not used, apply the digital signal to Connector J5.
OUTPUT SIGNALS
The DAC output voltages are available on the SMB connectors,
VOUT0 to VOUT7.
EXT_VL
EXT_VDD
DGND
AGND
AGND
EXT_REF
+6V
SDP CONNECTOR
EEPROM
V
REF
ADR431
2.5V REF
10-WAY
HEADER
SPI
INTERFACE
AD5676/
AD5676R
12993-002
VOUT0
VOUT1
VOUT6
VOUT7
Figure 2. Evaluation Board Block Diagram
Rev. 0 | Page 5 of 12
UG-814 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide
LINK CONFIGURATION OPTIONS
Multiple link (LKx) options must be set correctly to select the
appropriate operating setup before using the evaluation board.
The functions of these options are described in Table 2.
SETUP CONDITIONS
Before applying power and signals to the evaluation board,
ensure that all link positions are as required by the operating
mode. There are two modes in which to operate the evaluation
board. The evaluation boards can be operated in SDP controlled
mode to be used with the SDP-B board, or the evaluation board
can be used in standalone mode.
The Default Position column of Table 2 shows the default
positions in which the links are set when the evaluation board
is packaged. When the board is shipped, it is set up to operate
with the SDP-B board in SDP controlled mode.
Table 2. Link Functions
Link No. Function
Default
Position
LK1 This link selects the DAC analog voltage source. A
Position B selects an external supply voltage (EXT_ VCC).
LK2 This link selects the DAC digital voltage source. A
Position A selects the digital voltage source from the SDP-B board (V_IO).
Position B selects an external digital supply voltage (EXT_VLOGIC).
LK3 This link selects the reference source. A/B
1
Position A selects the internal reference of the AD5676R as the reference source or an external reference source
from the SMB connector EXT_REF. Use only Position A with the EVAL-AD5676RSDZ.
Position B selects U6 as the 2.5 V reference source. Do not use Position B with the EVAL-AD5676RSDZ.
LK4 This link selects the RSTSEL setting of the AD5676/AD5676R. A
Position A selects DAC power up to zero scale.
Position B selects DAC power up to midscale.
LK5
A
Position A selects software control of the gain via the SDP-B board.
Position B selects a gain of 0 V to 2 × V
REF
.
Position C selects a gain of 0 V to V
REF
.
1
Position A is the default for the EVAL-AD5676RSDZ. Position B is the default for the EVAL-AD5676SDZ.
Rev. 0 | Page 6 of 12
P1-P3P4-P6P7-P9P10-P12

EVAL-AD5676RSDZ

Mfr. #:
Buy EVAL-AD5676RSDZ
Manufacturer:
Analog Devices Inc.
Description:
EVAL BOARD FOR AD5676
Lifecycle:
New from this manufacturer.
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