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

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 ...More

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 sigmadsp@analog.com

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

Product Description

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.

Applications

  • 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)

    • Features

    • 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

    Diagrams

    AD1954 Diagram
    Functional Block Diagram for AD1954

    Specifications

    Instructions/Cycles 512
    DAC DNR (dB) 112dB
    DAC THD+N @ 1 kHz (-3dB) 100dB
    Digital I/O Channels 4/2
    Analog I/O Channels 0/3
    Product Description SigmaDSP 3 Ch, 26-/48-Bit Processing D/A

    Explore Other Products

    Part# Instructions/Cycles DAC DNR (dB) DAC THD+N @ 1 kHz (-3dB) ADC DNR (dB) ADC THD+N (dB) Digital I/O Channels Analog I/O Channels Product Description Price* (1000-4999)
    AD1940 1,536 n/a n/a - - 16/16 0/0 SigmaDSP Multichannel 28-/56-Bit Audio Processor w/ 4-Wire SPI ® control interface. $8.45
    AD1941 1,536 n/a n/a - - 16/16 0/0 SigmaDSP Multichannel 28-/56-Bit Audio Processor w/ 2-wire I2C ® control interface. $8.45
    AD1953 512 112 100 - - 4/6 0/3 SigmaDSP 3 Ch, 26-/48-Bit Processing D/A $7.14
    AD1954 512 112 100 - - 4/2 0/3 SigmaDSP 3 Ch, 26-/48-Bit Processing D/A $7.14
    ADAU1401 1,024 104 90 100 -83 8/8 2/4 28/56-Bit Automotive Audio Processor with Two ADCs and Four DACs -
    ADAU1701 1,024 104 90 100 -83 8/8 2/4 SigmaDSP® 28/56-Bit Audio Processor with Two ADCs and Four DACs $4.52
    ADAU1702 512 104 90 100 -83 8/8 2/4 SigmaDSP 28/56-Bit Audio Processor with 2 ADC/4 DAC $3.57

    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

    Pricing, Packaging & Availability

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    Model
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    Status
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    • Pre-Release: The model has not been released to general production, but samples may be available.
    • Production: The model is currently being produced, and generally available for purchase and sampling.
    • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
    • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
    Package Description
    The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

    For detailed drawings and chemical composition please consult our  Package Site

    Pin Count
    Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

    Temperature Range
    This is the acceptable operating range of the device. The various ranges specified are as follows:
    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • Automotive: -40 to +125 degrees Celsius
    Price
    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.

    Production Availability
    This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
    Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

    RoHS Compliant
    Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

    *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.
    **Sample availability may be better than production availability. Please enter samples iinto your cart to check sample availability.

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