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STA333BW Datasheet(PDF) 8 Page - STMicroelectronics

Part # STA333BW
Description  2.1-channel high-efficiency digital audio system
PDF  64 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA333BW Datasheet(HTML) 8 Page - STMicroelectronics

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Overview
STA333BW
8/64
1
Overview
The STA333BW is an integrated circuit comprising digital audio processing, digital amplifier
control, and DDX-power output stage to create a high-power single-chip DDX® solution with
high-quality, high-efficiency and all digital amplification.
The STA333BW is part of the Sound TerminalTM family that provides full digital audio
streaming to the speaker, thereby offering cost effectiveness, low power dissipation and
sound enrichment.
The IC power section consists of four independent half-bridges. These can be configured
via digital control to operate in different modes. 2.1 channels can be provided by two
half-bridges and a single full-bridge, providing up to 2 x 9 W + 1 x 20 W of power output. Two
channels can be provided by two full-bridges, providing up to 2 x 20 W of power. The IC can
also be configured as a 2.1 channels with 2 x 20 W provided by the device and external
power for DDX® power drive. Also provided in the STA333BW are a full assortment of digital
processing features. This includes up to four programmable 28-bit biquads (EQ) per
channel, and bass/treble tone control. Automodes™ enable a time-to-market advantage by
substantially reducing the amount of software development needed for certain functions.
This includes Auto Volume loudness, preset volume curves and preset EQ settings. New
advanced AM radio interference reduction modes. The serial audio data input interface
accepts all possible formats, including the popular I2S format. Three channels of DDX®
processing are provided. This high-quality conversion from PCM audio to DDX patented
tri-state PWM switching waveform provides over 100 dB SNR and dynamic range.
Figure 1.
Block diagram
Protection
current/thermal
Logic
Regulators
Bias
Power
control
DDX
PLL
Volume
control
Channel
1A
Channel
1B
Channel
2A
Channel
2B
I2S
interface
Power
Digital DSP
I2C



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