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ADAV4622:  Audio Processor for Advanced TV with Sound IF Demodulator and Stereo Decoder

Product Details

The ADAV4622 is an enhanced audio processor targeting advanced TV applications with full support for digital and analog baseband audio as well as multistandard broadcast SIF demodulation and decoding.

The audio processor, by default, loads a dedicated TV audio flow that incorporates full matrix switching (any input to any output), automatic volume control that compensates for volume changes during advertisements or when switching channels, dynamic bass, a multiband equalizer, and up to 200 ms of stereo delay memory for audio-video synchronization.

Alternatively, Analog Devices, Inc., offers an award-winning graphical programming tool (SigmaStudio™) that allows custom flows to be quickly developed and evaluated. This allows the creation of customer-specific audio flows, including use of the Analog Devices library of third-party algorithms.

The analog I/O integrates Analog Devices proprietary continuous-time, multibit Σ-Δ architecture to bring a higher level of performance to ATV systems, required by third-party algorithm providers to meet system branding certification. The analog input is provided by 95 dB dynamic range (DNR) ADCs, and analog output is provided by 94 dB DNR DACs.

The main speaker outputs can be supplied as a digitally modulated PWM stream to support digital amplifiers.

The ADAV4622 includes multichannel digital inputs and outputs. In addition, digital input channels can be routed through integrated sample rate converters (SRC), which are capable of supporting any arbitrary sample rate from 5 kHz to 50 kHz.


  • General-purpose consumer audio postprocessing
  • Home audio
    DVD recorders
    Home theater in a box (HTIB) systems and DVD receivers
  • Audio processing subsystems for DTV-ready TVs
  • Analog broadcast capability for iDTVs
  • Data Sheet, Rev. A, 11/08


    • Sound IF (SIF) processor
      SIF demodulator and broadcast stereo decoder
      NICAM (BG, DK, I, L), A2 (BG, DK, M), BTSC (M, N), EIAJ (M)
      Automatic sound IF standard detection
    • Fully programmable 28-bit audio processor for enhanced ATV sound—default TV audio flow loaded on reset
    • Implements Analog Devices and third-party branded audio algorithms
    • Adjustable digital delay line for audio/video
      Synchronization for up to 200 ms stereo delay
    • High performance 24-bit ADC and DAC
      94 dB DNR performance on DAC channels
      95 dB DNR performance on ADC channels
      Dual headphone outputs with integrated amplifiers
    • High performance pulse-width modulation (PWM) digital outputs
    • Fast I2C control
    • Operates from 3.3 V (analog), 1.8 V (digital core), and 3.3 V (digital interface)
    • Available in 80-lead LQFP

    Multichannel digital baseband I/O

    • 4 stereo synchronous digital I2S input channels
    • One 6-channel sample rate converter (SRC) and one stereo SRC supporting input sample rates from 5 kHz to 50 kHz
    • One stereo synchronous digital I2S output
    • S/PDIF output with S/PDIF input mux capability

    Functional Block Diagram for ADAV4622

    Of Note ...

    AdvantivA short-form datasheet for this product is available for download from this web page. Complete documentation including detailed hardware and software guides are available upon completion of a Non-Disclosure Agreement (NDA) (pdf, 27,604 bytes) and Customer Opportunity forms. Send your completed forms by e-mail to or by fax to "Advanced TV Marketing Administrator" at +353 61 302267. Additional support is available from your Analog Devices local sales.

    Additional product choices for Advanced TV applications are available on the Advantiv® site.


    Title Content Type File Type
    ADAV4622: Audio Processor for Advanced TV with Sound IF Demodulator and Stereo Decoder Data Sheet (Rev B, 07/2009) (pdf, 58 kB) Data Sheets 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
    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

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

    SampleSample & Buy

    Price, packaging, availability

    ADAV4622 Model Options
    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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