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 2x10W + 1x20W of power output.

Two channels, provided by two full-bridges, giving up to 2x20W 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 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 100dB SNR and dynamic range

技术特性

Wide supply voltage range (10V-36V)
3 Power output configurations
- 2x10W + 1x20W
- 2x20W
- 1x40W
Thermal protection
Under-voltage protection
Short-circuit protection
PowerSO-36 slug down package
2.1 Channels of 24-Bit DDX ®
100dB SNR and dynamic range
32kHz to 192kHz input sample rates
Digital gain/attenuation +48dB to -80dB in 0.5dB 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™
- 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
96kHz internal processing sample rate, 24 to 28-bit precision
Video application: 576*fs input mode

功能框图

STA323W 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
STA323W	Active		1000	PowerSO 36 MC	Tube		STA323W
STA323W13TR	Active		1000	PowerSO 36 MC	Tape And Reel		STA323W13TR

DATASHEET

下载	描述	版本	大小
STA323W	DS4377: 2.1-channel high-efficiency digital audio system	6	1510KB

APPLICATION NOTES

下载	描述	版本	大小
AN3340	AN3340: Loudspeaker characterization and compensation	1	3944KB
AN3984	AN3984: IIR filter design equations for Sound Terminal® devices	1	494KB