The STA333IS is an integrated circuit comprising digital audio processing, digital amplifier control and an FFX™power output stage to create a high-power, single-chip FFX solution for all-digital amplification with high quality and high efficiency.
The STA333IS power section consists of four independent half-bridge stages. Two channels can be provided by two full bridges, delivering up to 10 W + 10 W of power.
Also featured in the STA333IS are new advanced modes for reducing AM radio interference. The serial audio data input interface accepts all possible formats, including the popular I2S format. Two channels of FFX™processing are provided.
The STA333IS is part of the Sound Terminal®family that provides full digital audio streaming to the speaker, offering cost effectiveness, low-power dissipation and sound enrichment.
**Key Features**
Wide-range supply voltage (4.5 V - 20 V)
2 channels of ternary PWM (stereo mode)
2 channels of 24-bit FFX™
100 dB SNR and dynamic range
Selectable 32- to 192-kHz input sampling rates
Digital gain -80 dB to +48 dB in 0.5 dB steps
Software volume update
Individual channel and master gain/attenuation
Individual channel and master software and hardware mute
Independent channel volume bypass
Automatic zero-detect mute
Automatic invalid input detect mute
Short-circuit detection at startup (Out-Vcc, Out-Gnd, Out 1b-Out 2a)
2-channel I2 S input data interface
2 Hz DC cut filter (input)
Input channel mapping
Automatic volume control for limiting maximum power