AN-1246: Software Configurable 16-Bit Quad Channel Unipolar/Bipolar Voltage Output Using the AD5754 DAC (Rev. A) PDF

AN-1246
APPLICATION NOTE
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Software Configurable 16-Bit Quad Channel
Unipolar/Bipolar Voltage Output Using the AD5754 DAC
CIRCUIT FUNCTION AND BENEFITS
+15V
Product
AD5754
REF192
Description
Complete quad, 16-bit, unipolar/bipolar voltage
output DAC
Precision 2.5 V voltage reference
The circuit must be constructed on a multilayer PC board with
a large area ground plane. Proper layout, grounding, and
decoupling techniques must be used to achieve optimum
performance (see MT-031 Tutorial and MT-101 Tutorial).
Rev. A | Page 1 of 2
REF192
GND
+15V
10μF
+
+
+5V
0.1μF
0.1μF
DVCC
REFIN
10μF
0.1μF
AVDD
SDIN
SCLK
SYNC
SDO
VOUTA
VOUTA
VOUTB
VOUTB
VOUTC
VOUTC
VOUTD
VOUTD
AD5754
LDAC
CLR
BIN/2sCOMP
+5V
GND
DAC_GND (2)
SIG_GND (2)
AVSS
+
The AD5754 is a digital-to-analog converter that offers guaranteed
16-bit monotonicity, integral nonlinearity (INL) of ±16 LSB,
0.1% total unadjusted error (TUE), and 10 μs settling time. The
AD5754 also integrates reference buffers and output amplifiers,
which leads to further savings in both cost and board space.
Performance is guaranteed over the following supply voltage
ranges: AVDD supply range from +4.5 V to +16.5 V and AVSS
supply range from −4.5 V to −16.5 V. AVSS can be connected to
0 V if only unipolar outputs are required. The output range can
be individually programmed for each of the four channels. The
options are 0 V to +5 V, 0 V to +10 V, 0 V to +10.8 V, −5 V to
+5 V, −10 V to +10 V, and −10.8 V to +10.8 V. The input coding
is user selectable twos complement or offset binary for a bipolar
output (depending on the state of the BIN/2sCOMP pin). Coding
is straight binary for a unipolar output. Figure 2 shows that the
typical output error of this circuit at 25°C ambient temperature
is less than 0.06 %FSR.
VS OUTPUT
A
B
10μF
0.1μF
–15V
Figure 1. Unipolar/Bipolar Configuration of the AD5754 DAC
(Simplified Schematic)
Figure 2. Voltage Output Error
08328-001
Table 1. Devices Connected/Referenced
0.1μF
CONTROLLER
CIRCUIT DESCRIPTION
+
10μF
This circuit provides, unipolar and bipolar data conversion
using the AD5754BREZ, a quad, 16-bit, serial input, unipolar/
bipolar voltage output DAC, and the REF192ESZ precision 2.5 V
voltage reference. The only additional external components
needed for this 16-bit DAC circuit are decoupling capacitors
on the supply pins and reference input, leading to savings in
cost and board space. This circuit is well suited for closed-loop
servo control applications.
AN-1246
Application Note
LEARN MORE
REVISION HISTORY
Kester, Walt. 2005. The Data Conversion Handbook, Chapters 3
and 7. Analog Devices.
4/13—Rev. 0 to Rev. A
MT-015 Tutorial, Basic DAC Architectures II: Binary DACs.
Analog Devices.
Changed Document Title from CN-0086 to
AN-1246 .............................................................................. Universal
7/09—Revision 0: Initial Version
MT-031 Tutorial, Grounding Data Converters and Solving the
Mystery of AGND and DGND. Analog Devices.
MT-101 Tutorial, Decoupling Techniques. Analog Devices.
Voltage Reference Wizard Design Tool.
Data Sheets and Evaluation Boards
AD5754 Data Sheet.
REF192 Data Sheet.
AD5754R Evaluation Board (Compatible with AD5754).
©2009–2013 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
AN08328-0-4/13(A)
Rev. A | Page 2 of 2
Similar pages