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