Features
! Wide supply voltage range
– 4.5 V to 21.5 V operation
– 23-V absolute maximum rating
! 3 power output configurations
– 2 channels of ternary PWM (stereo mode)
(2 x 20 W into 8 Ω at 18 V)
– 3 channels - left, right using binary and LFE
using ternary PWM (2.1 mode) (2 x 9 W +
1 x 20W into 2 x 4 Ω, 1 x 8 Ω at 18 V)
– 2 channels of ternary PWM (2 x 20 W) +
stereo line out ternary
! 2.1 channels of 24-bit DDX®
! 100-dB SNR and dynamic range
! Selectable 32 kHz to 192 kHz input sample
rates
! I2C control with selectable device address
! Digital gain/attenuation +48 dB to -80 dB in
0.5-dB steps
! Soft volume update
! Individual channel and master gain/attenuation
! Dual independent limiters/compressors
! Dynamic range compression or anti-clipping
modes
! AutoModes
– 15 preset crossover filters
– 5 preset anti-clipping modes
– Preset night-time listening mode
! Individual channel and master soft and hard
mute
! Independent channel volume and DSP bypass
! Automatic zero-detect mute
! Automatic invalid input detect mute
! 2-channel I2S input data interface
! Input and output channel mapping
! 4 x 28-bit user programmable biquads (EQ) per
channel
! Up to 3 different EQ coefficients settings can
be stored and selected using I2C interface
! DC blocking selectable high-pass filter
! Selectable de-emphasis
! Sub channel mix into left and right channels
! Advanced AM interference frequency
switching and noise-suppression modes
! Selectable high or low bandwidth
noise-shaping topologies
! Variable max power correction for lower
full-power THD
! Thermal overload and short-circuit protection
! Video application supports 576 * fS input mode
! QSound QHD®
– Field proven stereo soundfield
enhancement technology
– Provides improved audio image width,
separation and depth for stereo signals
– Synthesizes a 3-D stereo soundfield
! PowerSSO-36 slug down package.

Description
The STA335BWSQS is an integration of digital audio processing, digital amplifier control,
DDX® power-output stage and QSound QHD® technology to create a high-power
single-chip DDX solution comprising high-quality, high-efficiency and all digital amplification.
The STA335BWSQS is part of the SoundTerminal™ family that provides full digital audio
streaming to the speaker offering cost effectiveness, low power dissipation and sound
enrichment.
The STA335BWSQS 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 STA335BWSQS 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 3-state PWM
switching waveform provides over 100 dB of SNR and dynamic range.