STA323W:2.1-channel high-efficiency digital audio system

The STA323W is a single-chip audio system comprising digital audio processing, digital amplifier control and a DDX®power-output stage. The STA323W uses all-digital amplification to provide high-power, high-quality and high-efficiency.

The STA323W power section consists of four independent half-bridges. These can be configured, by digital control, to operate in the following modes.

Two channels, provided by two half-bridges, and a single full-bridge giving up to 2 x 10 W + 1 x 20 W of power output.

Two channels, provided by two full-bridges, giving up to 2 x 20 W of power.

A single, parallel, full-bridge channel capable of high-current operation and giving 1 x 40W output.

The STA323W also provides a full set of digital processing features. This includes up to four programmable 28-bit biquads (EQ) per channel, and bass and treble tone control. AutoModes™ enable a time-to-market advantage by substantially reducing the amount of software development needed for specific functions. These includes auto volume loudness, preset volume curves and preset EQ settings. New advanced AM radio-interference reduction modes are also provided.

The serial audio data input interface accepts all existing formats, including the I²S.

Three channels of DDX®processing are provided. This high-quality conversion from PCM audio to DDX patented 3-state PWM switching provides over 100 dB of SNR and dynamic range.

Key Features

  • Wide supply voltage range (10 V - 36 V)
  • Three power output configurations
    • 2 x 10 W + 1 x 20 W
    • 2 x 20 W
    • 1 x 40 W
  • Thermal protection
  • Under-voltage protection
  • Short-circuit protection
  • PowerSO-36 slug down package
  • 2.1 channels of 24-bit DDX®
  • 100-dB SNR and dynamic range
  • 32 kHz to 192 kHz input sample rates
  • Digital gain/attenuation +48 dB to -80 dB in 0.5-dB steps
  • Four 28-bit user programmable biquads (EQ) per channel
  • I²C control
  • 2-channel I²S input data interface
  • Individual channel and master gain/attenuation
  • Individual channel and master soft and hard mute
  • Individual channel volume and EQ bypass
  • DDX® POP free operation
  • Bass/treble tone control
  • Dual independent programmable limiters/compressors
  • AutoModes™ settings for:
    • 32 preset EQ curves
    • 15 preset crossover settings
    • Auto volume controlled loudness
    • 3 preset volume curves
    • 2 preset anti-clipping modes
    • Preset night-time listening mode
    • Preset TV AGC
  • Input and output channel mapping
  • AM noise-reduction and PWM frequency shifting modes
  • Soft volume update and muting
  • Auto zero detect and invalid input detect muting selectable DDX® ternary or binary PWM output plus variable PWM speeds
  • Selectable de-emphasis
  • Post-EQ user programmable mix with default 2.1 bass-management settings
  • Variable max power correction for lower full-power THD
  • Four output routing configurations
  • Selectable clock input ratio
  • 96 kHz internal processing sample rate, 24 to 28-bit precision
  • Video application supports 576 * fs input mode
Product Specifications
DescriptionVersionSize
DS4377: 2.1 channel high-efficiency digital audio system7.0994 KB
Application Notes
DescriptionVersionSize
AN4118: APWLink USB interface board for Sound Terminal® demonstration boards2.01 MB
AN3984: IIR filter design equations for Sound Terminal® devices1.1493 KB
AN3340: Loudspeaker characterization and compensation1.33 MB
User Manuals
DescriptionVersionSize
UM1545: Using the Audio Processor Workbench (APWorkbench)1.03 MB
Flyers
DescriptionVersionSize
APWorkbench software for audio ICs and MEMS microphones1.02 MB
Brochures
DescriptionVersionSize
Analog audio solution1.01 MB
FFX - Full flexible amplification4 MB
FFX Full flexible amplification1.04 MB
Sample & Buy
Part NumberQuantityUnit Price (US$) *PackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)ECCN (EU)ECCN (US)Country of Origin
STA323W13TR10004.5PowerSO 36 MCTape And Reel--NECEAR99-
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STA323W13TRPowerSO 36 MCIndustrialEcopack3
2.1 channel high-efficiency digital audio system STA323W
circuit_diagram_11535_thumbnail.png STA323W
APWLink USB interface board for Sound Terminal® demonstration boards STEVAL-CCA030V1
IIR filter design equations for Sound Terminal® devices STA321MP
Loudspeaker characterization and compensation APWORKBENCH
Using the Audio Processor Workbench (APWorkbench) STEVAL-CCA030V1
Loudspeaker characterization and compensation APWORKBENCH
Using the Audio Processor Workbench (APWorkbench) STA339BWS
Using the Audio Processor Workbench (APWorkbench) STA339BWS
Using the Audio Processor Workbench (APWorkbench) STA339BWS