产品概述
描述
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.
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所有功能
- 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
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意法半导体 - STA326
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