STA333ML_08 Datasheet, PDF (1/14 Pages) STMicroelectronics – Sound TerminaTM 2-channel microless high-efficiency digital audio system

STA333ML
Sound Terminal™
2-channel microless high-efficiency digital audio system
Features
! Wide supply voltage range (4.5 - 18 V)
! 2 x 20 W into 8 Ω at Vcc = 18 V
! 3 power output configurations; 2 channels of
ternary PWM
! PowerSSO-36 exposed pad package
! 2 channels of 24-Bit DDX^®
! 100-dB SNR and dynamic range
! 32 kHz to 48 kHz input sample rates
! Soft volume update
! Automatic zero-detect mute
! Automatic invalid input detect mute
! 2-channel I²S input data interface
! Selectable clock input ratio (256 or 364 x fs)
! Max power correction for lower full power
! 96 kHz internal processing sample rate, 24-bit
precision
! Thermal overload and short-circuit protection
embedded
Applications
! LCD
! DVD
! Cradle
! Digital speaker
! Wireless speaker cradle
PowerSSO-36 slug down
Description
STA333ML is a single die embedding digital audio
processing and high efficiency DDX^® power
amplification, capable of operating without the aid
of an external micro controller.
The STA333ML is part of the Sound Terminal™
family that provides full digital audio streaming to
the speaker offering cost effectiveness, low
energy dissipation and sound enrichment.
The STA333ML combines a unique 24-bit DDX^®
digital class-D ternary modulator together with an
extremely low R_DSON stereo power DMOS stage.
It is capable of a total output power of 2 x 20 W
with outstanding performance in terms of
efficiency (>90 %), THD, SNR and EMI.
The microless feature allows the use in low-cost
applications (cradle, digital speakers, audio
terminals) where no micro controller is needed.
The serial audio data interface accepts the
universally used I²S format. Basic features (like
oversampling clock, gain and I2S format) can be
set using a minimal number of selection pins.
The STA333ML is self-protected against thermal
overload, overcurrent, short circuit and
overvoltage conditions.
The fault condition is also exported to an external
pin (INT_LINE) for specific requirements.
Table 1. Device summary
Order code
STA333ML
STA333ML13TR
Package
PowerSSO-36 (slug down)
PowerSSO-36 (slug down)
Packaging
Tube
Tape and reel
May 2008
Rev 2
1/14
www.st.com
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