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AD1954:  SigmaDSP® Digital Audio Processor with On-Board Converters

Product Details

The AD1954 is a complete, 26-bit, single-chip, 3-channel digital audio playback system with built-in DSP functionality. Key features include: 3 channels of digital audio; a 7-band, 48-bit stereo equalizer; delays for loudspeaker location adjustment; Phat Stereo™ spatial enhancement; and a dual-band, professional-quality dynamic processor. Its three DACs achieve 112 dB signal-to-noise ratio (SNR) at 48 kHz. Its dynamic processing features include:

  • Fine-tuned bass boost to enhance low frequencies for small loudspeakers
  • Algorithms that virtually increase loudness by removing distortion at high volumes
  • Midnight mode which automatically reduces loudness in high-volume instances (e.g., sudden loud scenes on DVDs)
  • Low-level expansion to lift low-volume signals above road noise (for car stereos)

Pricing and Availability:
The AD1954 SigmaDSP Digital Audio Processor is available in either a 44-pin MQFP or a 48-pin TQFP package and is rated for the extended -40°C to +105°C temperature range. The AD1954 is in Production, and Samples are available. Prices begin at $5.88 in 10,000-piece quantities.


  • 2.0/2.1 Channel Audio Systems (Two Main Channels plus Subwoofer)
  • Multimedia Audio
  • Automotive Sound Systems
  • Minicomponent Stereo
  • Home Theater Systems (AC-3 Postprocessor)
  • Musical Instruments
  • In-Seat Sound Systems (Aircraft, Motor Coaches)


  • 5 V 3-Channel Audio DAC System
  • Accepts Sample Rates up to 48 kHz
  • 7 Biquad Filter Sections per Channel
  • Dual Dynamic Processor with Arbitrary Input/Output Curve and Adjustable Time Constants
  • 0 ms to 6 ms Variable Delay/Channel for Speaker Alignment
  • Stereo Spreading Algorithm for Phat Stereo™ Effect
  • Differential Output for Optimum Performance
  • See data sheet for additional features

Functional Block Diagram for AD1954

Recommended for new designs is the AD1953. The AD1953 has all the same features as the AD1954 as well as some additional functions. Both parts are priced the same.

Check the SigmaDSP FAQ for any questions you might have. If they are not answered there, direct any SigmaDSP support inquiries to


Title Content Type File Type
AD1954: SigmaDSP™ 3-Channel, 26-Bit Signal Processing DAC Data Sheet  (Rev A, 08/2003) (pdf, 1470 kB) Data Sheets PDF
AN-327: DAC ICs: How Many Bits Is Enough?  (pdf, 345 kB)
Digital audio playback DACs are available in a variety of different architectures--each with it's own performance tradeoffs.
Application Notes PDF
AN-211: The Alexander Current-Feedback Audio Power Amplifier  (pdf, 1154 kB) Application Notes PDF
Sigma Studio Overview
Familiar audio processing blocks can be wired together as in a schematic, and the compiler generates DSP-ready code and a control surface for setting and tuning parameters.
Videos HTML
VisualDSP++ 5.0 Linker and Utilities Manual (Revision 3.5, January 2011)  (pdf, 2290 kB) | Request a CD Software Manuals PDF
Simplify Audio Setups with a SigmaDSP™Pre-Programmed Fully Configurable Digital Audio Processor
(Analog Dialogue, Vol. 36, No. 1, January-February, 2002)
Analog Dialogue HTML
Sound Bytes: Audio Converters
by Joshua Israelsohn, EDN Technical Editor
If it weren't for audio converters, some of our favorite products would just be spinning their wheels. (EDN, 6/24/04)
Technical Articles HTML
Audio Processors, Amplifiers Deliver Complete HDTV Audio Subsystem
(EE Times, 10/1/2007)
Product Reviews HTML
ADI: Analog Essential To HDTV Experience
(Electronic Design, 10/1/2007)
Product Reviews HTML
ADI Releases Sigma DSP AD1954, New DSP for Audio with D/A Converter
(Japanese Review, Kumikomi Net, CQ Publishing Co. Ltd., November 29, 2002)
Product Reviews HTML
ADI Releases New Processor Combining DSP and D/A Converters
(Japanese Review, Phile Web, Ongen Publishing Co., Ltd., November 27, 2001)
Product Reviews HTML
ADI Targets the 95% Portion of the Japanese Audio Market with New Processor Combining DSP and D/A Converter
(Japanese Review, NE Online, Nikkei Business Publishing Inc., November 29, 2002)
Product Reviews HTML
Digitaler Audio-Prozessor  (pdf, 24 kB)
(German Review, Elektronik Praxis, February 2002)
Product Reviews PDF
Analog Devices' SigmaDSP: Digitales Audio-Processing für den Massenmarkt  (pdf, 108 kB)
(German Review, Markt & Technik, 7/12/2001)
Product Reviews PDF
U.S. Analog Devices Announces SigmaDSP Family, new Digital Audio Processors
(Japanese Review, Nikkei Press Release, Nihon Keizai Shimbun Co., Ltd., November 27, 2001)
Product Reviews HTML
Best Products Winners: Hardware and Software
(Design News, March 20, 2006)
Product Reviews HTML
SigmaDSP® Audio Processors Overview HTML
Which SigmaDSP is right for my application? FAQs/RAQs HTML
Which SigmaDSP parts are qualified for automotive applications? FAQs/RAQs HTML
What evaluation boards are available for the SigmaDSP processors? FAQs/RAQs HTML
What advanced algorithms are available for SigmaDSP? FAQs/RAQs HTML
What is needed to boot a SigmaDSP processor? FAQs/RAQs HTML
What is the processing power and RAM sizes of the different SigmaDSPs? FAQs/RAQs HTML
How can I program and tune my target application using SigmaStudio? FAQs/RAQs HTML
When should I use double precision and when should I use single precision filters? FAQs/RAQs HTML
How do I protect my SigmaDSP design against power supply overvoltage and ESD? FAQs/RAQs HTML
How can I get a copy of SigmaStudio? FAQs/RAQs HTML
I already have a copy of SigmaStudio. How can I get the latest version? FAQs/RAQs HTML
Where can I find a description of the changes made in the latest version of SigmaStudio? FAQs/RAQs HTML
What are the PC requirements for SigmaStudio? FAQs/RAQs HTML
What documentation is available for SigmaStudio? FAQs/RAQs HTML
Can I use SigmaStudio without hardware connected? FAQs/RAQs HTML
How can I write my own algorithms in SigmaStudio? FAQs/RAQs HTML
After I link-compile-download my project, the bar at the bottom of SigmaStudio turns green. Does this mean my program downloaded to the DSP successfully? FAQs/RAQs HTML
How can I check that I have proper communication between SigmaStudio and the SigmaDSP hardware? FAQs/RAQs HTML
How can I see exactly what SigmaStudio is writing to the target hardware? FAQs/RAQs HTML
How do I change the sampling rate of my design in SigmaStudio? FAQs/RAQs HTML
Where can I see how much of the SigmaDSP resources my project consumes? FAQs/RAQs HTML
My signal flow is running out of instructions. What can I do to save resources? FAQs/RAQs HTML
I can't use the maximum delay memory in my project. What's happening? FAQs/RAQs HTML
When the signal input to my compressor is above 6 dB, the compression stops and my signal starts increasing. What's happening? FAQs/RAQs HTML
How can I eliminate pops when changing the delay parameter at run-time? FAQs/RAQs HTML
My application requires that I use multiple blocks that generate many addresses that I then have to map to my microcontroller code. Can I fix specific memory addresses for specific blocks to avoid all this mapping overhead? FAQs/RAQs HTML
What is the difference between the AD1953 and AD1954? FAQs/RAQs HTML
How can I tune my own hardware design using SigmaStudio? FAQs/RAQs HTML
Where can I get further support for the SigmaDSP? FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Firmware Loader for SigmaDSPs Device Drivers HTML

SampleSample & Buy

Price, packaging, availability

AD1954 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD1954YSTZ Status: Production 48 ld LQFP 48 Ind Tray, 250 $7.90 $7.14 Y  Material Info PCN Purchase Sample
AD1954YSTZRL Status: Production 48 ld LQFP 48 Ind Reel, 2000 $7.90 $7.14 Y  Material Info PCN Purchase
AD1954YSZ Status: Production 44 ld MQFP (13.20mm wide) 44 Ind Tray, 96 - - Y  Material Info PCN Purchase Sample
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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