STA326 2.1 high-efficiency digital audio system

The STA326 comprises digital audio processing, digital amplifier control and DDX®power output stage to create a high-power single-chip DDX®solution for high-quality, high-efficiency, all-digital amplification.

The STA326 power section consists of four independent half-bridges. These can be configured via digital control to operate in different modes. 2.1 channels can be provided by two half-bridges and a single full-bridge to give up to 2 x 40 W plus 1 x 80 W of power output. Two channels can be provided by two full-bridges to give up to 2 x 80 W of power. The IC can also be configured as a single parallel full-bridge capable of high-current operation and 1 x 160 W output.

Also provided in the STA326 is a full assortment of digital processing features. This includes up to four programmable 28-bit biquads (EQ) per channel and bass/treble tone control. Automodes enable a time-to-market advantage by substantially reducing the amount of software development needed for certain functions. This includes auto volume loudness, preset volume curves, preset EQ settings and new advanced AM radio-interference reduction modes.

The serial audio data input interface accepts all possible formats, including the popular I2S format.

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

技术特性

Wide supply voltage range (10 V - 36 V)
Three power output configurations
- 2 x 40 W + 1 x 80 W
- 2 x 80 W
- 1 x 160 W
PowerSO-36 package (exposed pad up (EPU))
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/hard mute
Individual channel volume and EQ bypass
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 nighttime listening mode
- Preset TV AGC
Input and output channel mapping
AM noise-reduction and PWM frequency-shifting modes
Software volume update and muting
Auto zero detect and invalid input detect muting
Selectable DDX®ternary or binary PWM output + 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

功能框图

STA326 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
STA326	Active	3.1	1000	PowerSO 36	Tube		STA326

DATASHEET

下载	描述	版本	大小
STA326	DS4373: 2.1-channel high-efficiency digital audio system	5	683KB

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