Evaluation Board User Guide
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Evaluating the AD5443, AD5446, and AD5453 Current Output/Serial Input DACs
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. A | Page 1 of 12
FEATURES
Full-featured evaluation board for the AD5443, AD5446, and
AD5453
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
Digital waveform generation
FUNCTIONAL BLOCK DIAGRAM
10226-001
V
OUT
SYNC
IOUT1
AD5443
EVAL-SDP-CB1Z
IOUT2
SCLK
SDI
SYNC
SCLK
SDI
SDO
USB
SDO
V
REF
V
OUT1
V
OUT2
SYNC
IOUT1
AD5446
IOUT2
SCLK
SDI
SDO
V
REF
V
OUT1
V
OUT2
SYNC
IOUT
AD5453
EV-AD5443/46/53SDZ
SCLK
SDI
V
REF
ADR01
REFERENCE
Figure 1.
GENERAL DESCRIPTION
The AD5443, AD5446,and AD5453 are CMOS 12-bit, 14-bit,
and 14-bit, respectively, current output, digital-to-analog
converters (DACs). The AD5443 operates from a 3 V to 5.5 V
power supply, while the AD5446 and AD5453 operate from a
single 2.5 V to 5.5 V power supply. These devices are well suited
for portable battery-powered and applications such as waveform
generation and analog processing.
Because of the CMOS submicron manufacturing process, these
parts offer excellent 4-quadrant multiplication characteristics of
10 MHz for the AD5443 and up to 12 MHz for the AD5446 and
AD5453 DACs.
These DACs use a double-buffered, 3-wire serial interface that
is compatible with SPI, QSPI™, MICROWIRE™, and most DSP
interface standards. On power-up, the internal shift register and
latches are filled with 0s, and the DAC output is at zero scale. In
addition for the AD5443 and AD5446, a serial data out pin
(SDO) allows for daisy chaining when multiple packages are
used. Data readback allows the user to read the contents of the
DAC register via the SDO pin.
The applied external reference input voltage (V
REF
) determines
the full-scale output current. An integrated feedback resistor
(R
FB
) provides temperature tracking and full-scale voltage output
when combined with an external current-to-voltage precision
amplifier.
The AD5443 and AD5446 are available in small 10-lead MSOP
packages, while the AD5453 is available in small 8-lead TSOT,
MSOP packages, also comes in 8-lead LFCSP.
The EV-AD5443/46/53SDZ board is used in conjunction with
the EVA L -SDP-CB1Z system demonstration platform (SDP)
board available from Analog Devices, Inc., which is purchased
separately from the evaluation board. The USB-to-SPI
communication to the DAC is completed using this Blackfin®-
based demonstration board.
