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Digital to Analog (DAC) Circuits
Converters -- Main Page

Digital to Analog Circuits:   #'s - B      C - D        E - O      P - T      U - Z
 

Last Updated: October 09, 2017 03:38 PM


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PC & DACs Generate Two Simple Circuit Analog Outputs 10/14/00 EDN-Design Ideas The simple and inexpensive circuit in Figure 1 generates two PC-controlled analog reference voltages.  You supply a wall-adapter supply and a parallel connector, and the circuit is ready to run.  The circuit uses two 12-bit AD7243 DACs, which require only one supply voltage.  These converters also include internal references, minimizing the number of external components.__ Circuit Design by Jim Terrade, Clermont-Ferrand, France

Precision DAC Delivers 0-to 5-A Output Current with 14-Bit Resolution Many industrial applications demand high-resolution control of an output current.  The circuit in the figure handles that requirement by generating a 0-5 A output current with 14-bit resolution.  A serial digital signal controls a __ Designed by Ronald Moradkhan

Precision, Bipolar Configuration for the AD5426/AD5432/AD5443 8-Bit to12-Bit DACs The transfer function of this circuit shows that both negative and positive output voltages are created as the input data, D, is incremented from code zero (V OUT = − V REF) to midscale (V OUT = 0 V) to full scale (V OUT = + V REF___ Analog Devices from the Lab

Precision, Bipolar Configuration for the AD5546/AD5556 DAC In general, the input offset voltage should be a fraction of an LSB to ensure monotonic behavior when stepping through codes.  VOUT can be calculated for the AD5546 using the equation where D = 0 to 65535 for 16-bit DAC (D is the decimal equivalent of the input code).  VOUT can be calculated for the AD5556 using the equation where D = 0 to 16383 for 14-bit DAC (D is the decimal equivalent of the input code).  , The AD8605 is another excellent op amp candidate for the I-V conversion circuit___ Analog Devices from the Lab

Precision, Bipolar, Configuration for the AD5450/1/2/3 8-14bit Multiplying DACs The transfer function of this circuit shows that both negative and positive output voltages are created as the input code, D, is incremented from Code 0 (V OUT = − V REF) to midscale (V OUT = 0 V) to full-scale (V OUT = +V REF A change in this noise gain between two adjacent codes produces a step change in the output voltage due to the amplifier’s input offset voltage.  This output voltage change is superimposed on the desired change in output between the two codes and gives rise to a differential linearity error, which, if large enough, can cause the DAC to be nonmonotonic.  , In general, the input offset voltage should be a fraction of an LSB to ensure monotonic behavior when stepping through codes___ Analog Devices from the Lab

Precision, Bipolar, Configuration for the AD5547/AD5557 DAC In general, the input offset voltage should be a fraction of an LSB to ensure monotonic behavior when stepping through codes.  VOUT can be calculated for the AD5547 using the equation where D = 0 to 65535 for 16-bit DAC (D is the decimal equivalent of the input code).  VOUT can be calculated for the AD5557 using the equation where D = 0 to 16383 for 14-bit DAC (D is the decimal equivalent of the input code)___ Analog Devices from the Lab

Precision, Unipolar, Inverting Conversion using the AD5546/AD5556 DAC In general, the input offset voltage should be a fraction of an LSB to ensure monotonic behavior when stepping through codes.  VOUT can be calculated for the AD5546 using the equation where D is the decimal equivalent of the input code.  VOUT can be calculated for the AD5556 using the equation where D is the decimal equivalent of the input code.  , For multichannel applications, the AD8629 is a dual version of the AD8628___ Analog Devices from the Lab

Precision, Unipolar, Inverting Conversion using the AD5547/AD5557 DAC In general, the input offset voltage should be a fraction of an LSB to ensure monotonic behavior when stepping through codes.  VOUT can be calculated for the AD5547 using the equation where D is the decimal equivalent of the input code.  VOUT can be calculated for the AD5557 using the equation where D is the decimal equivalent of the input code.  , For multichannel applications, the AD8629 is a dual version of the AD8628___ Analog Devices from the Lab

Precision, Unipolar, Noninverting Configuration for the AD5546/AD5556 DAC In general, the input offset voltage should be a fraction of an LSB to ensure monotonic behavior when stepping through codes.  VOUT can be calculated for the AD5546 using the equation where D is the decimal equivalent of the input code.  VOUT can be calculated for the AD5556 using the equation where D is the decimal equivalent of the input code.  , The AD8629 is a dual version of the AD8628___ Analog Devices from the Lab

Precision, Unipolar, Noninverting Configuration for the AD5547/AD5557 DAC In general, the input offset voltage should be a fraction of an LSB to ensure monotonic behavior when stepping through codes.  VOUT can be calculated for the AD5547 using the equation where D is the decimal equivalent of the input code.  VOUT can be calculated for the AD5557 using the equation where D is the decimal equivalent of the input code___ Analog Devices from the Lab

Programmable Gain Element using the AD5426/AD5432/AD5443 Current Output DACs This output voltage change is superimposed on the desired change in output between the two codes and gives rise to a differential linearity error that, if large enough, could cause the DAC to be nonmonotonic___ Analog Devices from the Lab

Programmable Gain Element using the AD5450/AD5451/AD5452/AD5453 Current Output DAC Family A change in this noise gain between two adjacent digital codes produces a step change in the output voltage due to the amplifier’s input offset voltage.  This output voltage change is superimposed on the desired change in output between the two codes and produces a diffe-rential linearity error, which if large enough, could cause the DAC to be non-monotonic___ Analog Devices from the Lab

Pushbutton or logic controls nonvolatile DACs 11/19/98 EDN-Design Ideas NOTE :  File contain several designs.  Scroll to find this one.  For manual control of analog signals, it's hard to beat the venerable precision multiturn potentiometer's simplicity, resolution, and power-off nonvolatility.  When digital control of an analog parameter is the design objective, a universe of DACs is available to the designer.  The circuit in Figure 1, however, has manual-pushbutton and CMOS /TTL-compatible digital interfaces to a 10-bit, nonvolatile, two- or four-quadrant multiplying DAC.  The heart of the circuit is the Xicor (Milpitas, CA) X9511 PushPot series of digitally controlled potentiometers.__ Circuit Design by Stephen Woodward, University of North Carolina, Chapel Hill, NC

R-2R Digital to Analog Converter Use this circuit as a low cost alternative to a commercial DAC.  It is important that the latch be a CMOS device, so that the outputs drive to Vcc when they are high.  (TTL devices only drive to 2.4 volts or so). __ Designed by billd @ reprise.com

Reduce Thermal Transients In R-2R Ladder 03/28/96 EDN-Design Ideas An R-2R resistive ladder network with a matched feedback resistor (Figure 1) is the core of the typical D/A converter, whether fabricated in discrete, hybrid, or CMOS -monolithic form.  In this configuration, thermal effects can degrade performance, causing poor settling characteristics and transfer-function nonlinearity in the low-frequency range.  The addition of a second feedback resistor, R2, can reduce the degradation.__ Circuit Design by   Alex Belousov, Standard Motor Products, Rego Park, NY

Resistance, DC Current, AC Current & Frequency & Period Measurement Errors in Digital MultimetersAN-1389-2 Application Note___ Aligent

Resistive DAC & Op Amp Form Hybrid Divider 17-Sep-09 EDN-Design Ideas A programmable resistance is all you need in a feedback loop__ Circuit Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia

S/PDIF to Analogue Converter This is quite possibly the simplest S/PDIF receiver and DAC available.  It uses the absolute minimum of parts, and also minimises the connections and control functionality usually provided.  It is still a serious project, and is not recommended for beginners __ Designed by Rod Elliott  ESP

Selecting Op Amps for Precision 16-Bit DACs DN214 Design Notes___ Linear Technology/Analog Devices

Selecting the Right Series Voltage Reference for Absolute Accuracy Voltage Output DAC Designs App Note/ 754 / Oct-08___ Maxim Integrated

Serial port drives low-cost, three-wire DACs EDN  Design Ideas03/03/1997    The circuit in Figure 1 allows you to control low-cost, three-wire D/A converters through a PC's serial port.  A 74HC14 extracts the three signals (data, clock, and load) from the signal on one wire.  The method relies on the data-pulse width: a short pulse is a logic 1; a long pulse is a logic 0.  The serial-port settings are COM1/9600 baud/no parity/8 data bits.  A logic 1 transmits as 255, which leads to a short pulse (start bit only); a logic 0 transmits as 0, which results in a pulse that's nine times longer.  Figure 2 is the timing diagram for the process.__ Circuit Design by Bernard Willaert, Barco Display Systems, Kortrijk, Belgium

Simple Circuit converts 5V to –10V 26-May-05 EDN-Design Ideas Switched-capacitor circuit doubles, inverts dc source__ Circuit Design by Ken Yang, Maxim Integrated Products Inc, Sunnyvale, CA

Standards LAB Grade 20-Bit DAC with 0.1PPM/ °C Drift AN86 Linear Technology This publication details a true 1ppm D-to-A converter.  Total DC error of this processor corrected DAC remains within 1ppm from 18-32°C, including reference drift.  DAC error exclusive of reference drift is substantially better.  Construction details and performance verification techniques are included, along with a complete software listing. __ Linear Technology/Analog Devices

Technique Increases Low Cost DAC's Resolution 04/09/98 EDN-Design Ideas (Scroll to find this circuit) Cost-sensitive µC applications often employ resistor chains to implement crude DACs.  You can extend this method by exploiting the way in which many µCs allow individual output pins to be set to either low ("0''), high ("1''), or floating ("F") states.  A converter can thus respond to ternary rather than binary codes__ Circuit Design by Jeremy Dean, Thomson-Thorn Missile Electronics Ltd, Basingstoke, UK

Twin DAC's Produce True Bipolar Operation 08/18/94 EDN-Design Ideas The 8-bit multiplying DAC-08 is a versatile device that offers excellent performance at low cost.  This DAC produces an output current that is the product of an 8-bit digital number and the input reference current.__ Circuit Design by S Ravindranathan, Naval Physical and Oceanographic Laboratory

Two DAC Adds & Subtracts 09/01/98 EDN-Design Ideas A typical way to add two binary words and provide an analog output is to use several digital ICs that drive a DAC.  The circuit in Figure 1  eliminates the use of several digital-IC packages and, hence, the need for the digital power supply.  The circuit simultaneously carries out addition and subtraction.   File has many circuits, scroll down.__ Circuit Design by V Manoharan, Naval Physical and Oceanographic Laboratory, Kochi, India

Two-quadrant multiplying DAC utilizes octal CMOS buffer 09/30/13  EDN-Design Ideas Here's a novel approach to making a multiplying DAC__ Circuit Design by Ajoy Raman


Digital to Analog Circuits:    #'s - B      C - D        E - O      P - T      U - Z

 


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