ADAV4601 Datasheet, PDF (1/60 Pages) Analog Devices – Audio Processor for Advanced TV

Audio Processor for Advanced TV
ADAV4601
FEATURES
Fully programmable 28-bit audio processor for enhanced
ATV sound—default audio processing flow loaded on reset
Implements Analog Devices, Inc. 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
Headphone output with integrated amplifiers
High performance pulse-width modulation (PWM) digital
outputs
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
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
APPLICATIONS
General-purpose consumer audio post processing
Home audio
DVD recorders
Home theater in a box systems and DVD receivers
Audio processing subsystems for DTV-ready TVs
Analog broadcast capability for iDTVs
GENERAL DESCRIPTION
The ADAV4601 is an enhanced audio processor targeting
advanced TV applications with full support for digital and
analog baseband audio.
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 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 the use of ADI 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 ADAV4601 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.
Rev. B
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