Digital Audio System 36-Pin PowerSO Slug Up T/R

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.

• 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 fullpower 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