Sound Terminal 2-channel high-efficiency digital audio system

The STA333IS is an integrated circuit comprising digital audio processing, digital amplifier control and an FFXpower 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 FFXprocessing 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



Description バージョン サイズ
DS8917 DS8917: Sound Terminal® 2-channel high-efficiency digital audio system 3.0 1 MB
Description バージョン サイズ
AN4200 AN4200: Four-layer demonstration board based on the STA333IS 1.0 2 MB
AN3340 AN3340: Loudspeaker characterization and compensation 1.3 3 MB
AN4233 AN4233: Sound Terminal®: a method for measuring the total thermal resistance (Rth) in the final application 1.0 240 KB
AN4199 AN4199: Two-layer demonstration board based on the STA333IS 1.0 2 MB

Publications and Collaterals

Description バージョン サイズ
APWorkbench software for audio ICs and MEMS microphones 1.0 2 MB
Description バージョン サイズ
Analog audio solution 1.0 1 MB
FFX - Full flexible amplification 4 MB
FFX Full flexible amplification 1.0 4 MB

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サンプル & 購入

製品型番 Marketing Status 数量 Unit Price (US$) * パッケージ Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STA333IS Active 1000 1.242 Chip Scale Package 0.5mm pitch Tape And Reel 0 70 NEC EAR99 - MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

品質 & 信頼性

製品型番 Marketing Status パッケージ Grade RoHS Compliance Grade Material Declaration**
STA333IS アクティブChip Scale Package 0.5mm pitchIndustrialEcopack3 0 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.