DAC (Digital-Audio-Converter)

[lemonhorse]

Digital-Analog-Umsetzer
Ein Digital-Analog-Umsetzer (DAU, engl. digital-to-analog converter (DAC)), auch Digital-Analog-Wandler  oder D/A-Wandler genannt, wird verwendet, um quantisierte  digitale Signale oder einzelne Werte in analoge Signale umzusetzen. Quelle der Signale sind dabei der Analog-Digital-Umsetzer und/oder digitale Information oder Berechnung. In der Regel wird der DAU als Integrierter Schaltkreis (IC) ausgeführt.
http://de.wikipedia.org/wiki/Digital-Analog-Umsetzer

Digitaltechnik II 8 Digital-Analog-Umsetzer Seite 8 - 1
Prof. Dr. -Ing. G. Biethan Fassung 1.03 vom 01.10.2003
Lernziele: In diesem Kapitel werden Digital-Analog-Umsetzer behandelt. Sie erfahren die wichtigsten
technischen Merkmale und die elektronischen Grundschaltungen dieser Umsetzer. Einsatzbereiche
sowie wichtige Anwendungen werden vorgestellt.
http://www.fh-friedberg.de/fachbereiche/e2/digital-labor/Unterlagen/DT_Script/DT2SCKA8.pdf

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The Analog Devices AD7541A is a low cost, high performance
12-bit monolithic multiplying digital-to-analog converter. It is
fabricated using advanced, low noise, thin film on CMOS
technology and is available in a standard 18-lead DIP and in
20-terminal surface mount packages.
http://www.analog.com/static/imported-files/Data_Sheets/AD7541A.pdf

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The CS8411/12 are monolithic CMOS circuits that
receive and decode audio and digital data according
to the AES/EBU, IEC958, S/PDIF, and EIAJ
CP-340 interface standards.
http://www.datasheetcatalog.org/datasheets/700/158850_DS.pdf

http://www.jogis-roehrenbude.de/Leserbriefe/CD-Player-Projekt/DAC-Schaltung.gif

http://www.jogis-roehrenbude.de/Leserbriefe/CD-Player-Projekt/

Kontext:
Selbstbau-Gemeinschaftsprojekt : CD-Player mit Röhren - CD-Filter und Röhrenausgangsstufe.
http://www.jogis-roehrenbude.de/Leserbriefe/CD-Player-Projekt/CD.htm

[lemonhorse]

Non-oversampling - Digital filter-less DAC Concept
by Ryohei Kusunoki
http://www.sakurasystems.com/articles/Kusunoki.html

[lemonhorse]

Convertus Decima Digital
Few weeks ago I published the results of my studies and tests reguarding the usage of decimation in a zero-oversampling DAC. Unfortunately I had not yet been able, at the time, to find a digital process that could obtain decimation in an easy way, while protecting the audio signal from any contamination.
Just after a few days from the publication I was studying how to connect another DAC chip to a CS8412, and all of a sudden I found out what I had not been able to understand for a couple of years - the easy way to decimation.
http://www.tnt-audio.com/clinica/convertusdecdig_e.html

[lemonhorse]

DAC End
by Andrea Ciuffoli - starting in the 2008

INTRODUCTION
After many time lost to explore the DAC world from the DAC 1.0 to the DAC Final I have found the end of this way.
The No Oversampling DAC give a more natural sound but if you ear the TDA1541 and TDA1543 seem to lose details.
The AD1865N-K with passive I/V give a perfect combination, natural sound and all the details.
So this project is the end of my DAC projects also if someone speak very well about the AD1862.
The AD1865N-K give the better performances with a 200ohm MK132 Caddock as passive I/V.
In this configuration the output signal is too low to drive any amplifier so I have design for the AD1865N-K the better output stage.
This DAC use a single ended vaccum tube amplifier with output transformer and no interstage capacitors.
To get the max sonic performances has been used the new amorphous C-core by Lundahl.
I have tested other output stages like the LL7903 used as voltage amplifier or as I/V conv. but the results was bad if compared to this.
http://www.audiodesignguide.com/DacEnd/index.html