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AD1941:  SigmaDSP® Multichannel 28-Bit Audio Processor

The AD1941 is a complete 28-bit, single-chip, multichannel audio DSP for speaker equalization, multiband compression/ limiting, delay compensation, and image enhancement. These algorithms can be used to compensate for the real-world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of perceived audio quality.

The signal processing used in ...More

AD1941:  SigmaDSP® Multichannel 28-Bit Audio Processor

Product Description

The AD1941 is a complete 28-bit, single-chip, multichannel audio DSP for speaker equalization, multiband compression/ limiting, delay compensation, and image enhancement. These algorithms can be used to compensate for the real-world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of perceived audio quality.

The signal processing used in the AD1941 is comparable to that found in high-end studio equipment. Most of the processing is done in full 56-bit double-precision mode, resulting in very good low-level signal performance and the absence of limit cycles or idle tones. The compressor/limiter uses a sophisticated multiple-breakpoint algorithm often found in high-end broadcast compressors.

The AD1941 is a fully-programmable DSP. Easy-to-use software allows the user to graphically configure a custom signal processing flow with provided blocks such as biquad filters, dynamics processors, and surround sound processors. An extensive control port allows click-free parameter updates, along with read-back capability from any point in the algorithm flow.

The AD1941’s digital input and output ports allow glueless connection to ADCs and DACs in either 2-channel or TDM mode, and to digital amplifier power stages such as the AD1991. When in TDM mode, the AD1941 can input 8 or 16 channels of serial data, and can output either 8 or 16 channels of serial data. The input and output port configurations can be individually set.

Applications

  • Automotive sound systems
  • Mini-component stereos
  • Home theater systems (AC-3 postprocessor)
  • Multichannel audio systems
  • Multimedia audio
  • Digital speaker crossover
  • Musical instruments
  • In-seat sound systems (aircrafts/motor coaches)

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    EVALUATION BOARDS & DEVELOPMENT KITS

    • 16-channel digital audio processor
    • Accepts sample rates up to 192 kHz
    • 28-bit x 28-bit multiplier with full 56-bit accumulator
    • Fully-programmable program RAM for custom program download
    • Parameter RAM allows complete control of 1024 parameters
    • I2C control port features safeload for transparent parameter updates and complete mode and memory transfer control
    • Hardware-accelerated DSP core
    • See data sheet for additional features
    • Instructions/Cycles: 1536
    • DAC DNR (dB): n/a
    • DAC THD+N @ 1 kHz (-3dB): n/a
    • Digital I/O Channels: 16/16
    • Analog I/O Channels: 0/0
    • Product Description: SigmaDSP Multichannel 28-/56-Bit Audio Processor w/ 2-wire I2C ® control interface.

    Functional Block Diagram for AD1941

    For evaluating the AD1941, please use the EVAL-AD1940MINIBZ. The parts only differ in that the AD1941 has an I2C control port and the AD1940 has an SPI control port. You can get further information from the SigmaDSP FAQ. If your questions are not answered there, direct any SigmaDSP support inquiries to sigmadsp@analog.com.

    Pricing, Packaging & Availability

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    For detailed drawings and chemical composition please consult our  Package Site

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    Price
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    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.

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    *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 into your cart to check sample availability.