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.