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STA333IS：Sound Terminal 2-channel high-efficiency digital audio system

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
• 96 kHz internal processing sampling rate, 24-bit precision
• Advanced modes for AM interference frequency switching and noise suppression
• Embedded thermal-overload and short-circuit protection
• Video application: 576 * fS input mode support

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