Audio Processor for Advanced TV ADAV4601 FEATURES GENERAL DESCRIPTION Fully programmable 28-bit audio processor for enhanced The ADAV4601 is an enhanced audio processor targeting ATV sounddefault audio processing flow loaded on reset advanced TV applications with full support for digital and Implements Analog Devices, Inc. and third-party branded analog baseband audio. audio algorithms The audio processor, by default, loads a dedicated TV audio flow Adjustable digital delay line for audio/video that incorporates full matrix switching (any input to any output), Synchronization for up to 200 ms stereo delay automatic volume control that compensates for volume changes High performance 24-bit ADC and DAC during advertisements or when switching channels, dynamic 94 dB DNR performance on DAC channels bass, a multiband equalizer, and up to 200 ms of stereo delay 95 dB DNR performance on ADC channels memory for audio-video synchronization. Headphone output with integrated amplifiers Alternatively, Analog Devices offers an award-winning graphical High performance pulse-width modulation (PWM) digital programming tool (SigmaStudio) that allows custom flows to be outputs quickly developed and evaluated. This allows the creation of Multichannel digital baseband I/O 2 customer-specific audio flows, including the use of ADI library of 4 stereo synchronous digital I S input channels third-party algorithms. One 6-channel sample rate converter (SRC) and one stereo SRC supporting input sample rates from 5 kHz to 50 kHz The analog I/O integrates Analog Devices proprietary continuous- 2 One stereo synchronous digital I S output time, multibit - architecture to bring a higher level of S/PDIF output with S/PDIF input mux capability performance to ATV systems, required by third-party algorithm 2 Fast I C control providers to meet system branding certification. The analog input Operates from 3.3 V (analog), 1.8 V (digital core), and 3.3 V is provided by 95 dB dynamic range (DNR) ADCs, and analog (digital interface) output is provided by 94 dB DNR DACs. Available in 80-lead LQFP The main speaker outputs can be supplied as a digitally modulated APPLICATIONS PWM stream to support digital amplifiers. General-purpose consumer audio post processing The ADAV4601 includes multichannel digital inputs and outputs. Home audio In addition, digital input channels can be routed through integrated DVD recorders sample rate converters (SRC), which are capable of supporting any Home theater in a box systems and DVD receivers arbitrary sample rate from 5 kHz to 50 kHz. Audio processing subsystems for DTV-ready TVs Analog broadcast capability for iDTVs Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 20082009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ADAV4601 TABLE OF CONTENTS Features .............................................................................................. 1 DAC Voltage Outputs ................................................................ 22 Applications ....................................................................................... 1 PWM Outputs ............................................................................ 22 General Description ......................................................................... 1 Headphone Output .................................................................... 22 2 Revision History ............................................................................... 3 I S Digital Audio Outputs ......................................................... 23 Functional Block Diagram .............................................................. 4 S/PDIF Input/Output ................................................................. 23 Specif icat ions ..................................................................................... 5 Hardware Mute Control ............................................................ 23 Performance Parameters ............................................................. 5 Audio Processor ......................................................................... 23 Timing Specifications .................................................................. 7 Graphical Programming Environment ................................... 23 Timing Diagrams .......................................................................... 8 SigmaStudio Pin Assignment ................................................... 24 Absolute Maximum Ratings ............................................................ 9 Application Layer ....................................................................... 24 Thermal Resistance ...................................................................... 9 Loading a Custom Audio Processing Flow ............................. 24 Thermal Conditions ..................................................................... 9 Numeric Formats ....................................................................... 24 ESD Caution .................................................................................. 9 ROMs and Registers ................................................................... 25 Pin Configuration and Function Descriptions ........................... 10 Safe Loading to Parameter RAM and Target/Slew RAM ...... 25 Typical Performance Characteristics ........................................... 12 Read/Write Data Formats ......................................................... 25 Terminology .................................................................................... 14 Target/Slew RAM ....................................................................... 26 Pin Functions .................................................................................. 15 Layout Recommendations ........................................................ 28 Detailed Pin Descriptions ......................................................... 15 Typical Application Diagram ........................................................ 29 Functional Descriptions ................................................................ 17 Audio Flow Control Registers....................................................... 31 Power-Up Sequence ................................................................... 17 Detailed Register Descriptions ................................................. 31 Master Clock Oscillator ............................................................. 17 Main Control Registers .................................................................. 48 2 I C Interface ................................................................................ 17 Detailed Register Descriptions ................................................. 48 2 I C Read and Write Operations ................................................ 19 Outline Dimensions ....................................................................... 58 ADC Inputs ................................................................................. 19 Ordering Guide .......................................................................... 58 2 I S Digital Audio Inputs ............................................................. 20 Rev. B Page 2 of 60