TAS5709 Datasheet, PDF (1/59 Pages) Texas Instruments – 20-W STEREO DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC

TAS5709
www.ti.com........................................................................................................................................................................................... SLOS599 – NOVEMBER 2008
20-W STEREO DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC
FEATURES
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• Audio Input/Output
– 20-W Into an 8-Ω Load From an 18-V Supply
– Wide PVDD Range, From 8 V to 24 V
– Efficient Class-D Operation Eliminates
Need for Heatsinks
– Requires Only 3.3 V and PVDD
– One Serial Audio Input (Two Audio
Channels)
– Supports 8-kHz to 48-kHz Sample Rate
(LJ/RJ/I²S)
• Audio/PWM Processing
– Independent Channel Volume Controls With
24-dB to Mute
– Soft Mute (50% Duty Cycle)
– Programmable 2-Band Dynamic Range
Control
– 22 Programmable Biquads for Speaker EQ
and Other Audio Processing Features
– Programmable Coefficients for DRC Filters
– Programmable Input and Output Mixers
– DC Blocking Filters
– Support for 3D Effects
– Pseudo Bass Support
• General Features
– Serial Control Interface Operational Without
MCLK
– Factory-Trimmed Internal Oscillator for
automatic rate detection
– Surface Mount, 48-PIN, 7-mm × 7-mm
HTQFP Package
– Thermal and Short-Circuit Protection
• Benefits
– EQ: Speaker Equalization Improves Audio
Performance
– DRC: Dynamic Range Compression. Can
Be Used As Power Limiter. Enables
Speaker Protection, Easy Listening,
Night-Mode Listening.
– 2-Band DRC: Set 2 different thresholds for
low and high frequency content.
– Autobank Switching: Preload Coefficients
for Different Sample Rates. No Need to
Write new Coefficients to the Part When
Sample Rate Changes.
– Autodetect: Automatically Detects
Sample-Rate Changes. No Need for
External Microprocessor Intervention
DESCRIPTION
The TAS5709 is a 20-W, efficient, digital audio power
amplifier for driving stereo bridge-tied speakers. One
serial data input allows processing of up to two
discrete audio channels and seamless integration to
most digital audio processors and MPEG decoders.
The device accepts a wide range of input data and
data rates. A fully programmable data path routes
these channels to the internal speaker drivers.
The TAS5709 is a slave-only device receiving all
clocks from external sources. The TAS5709 operates
with a PWM carrier between 384-kHz switching rate
and 352-KHz switching rate depending on the input
sample rate. Oversampling combined with a
fourth-order noise shaper provides a flat noise floor
and excellent dynamic range from 20 Hz to 20 kHz.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated