STA326 datasheet(8/64 Pages) STMICROELECTRONICS

8 / 64 page

Description

STA326

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DocID11531 Rev 9

Description

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.

Figure 1. Block diagram

Figure 2. Channel signal flow diagram through the digital core

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STA326 数据表(PDF) 8 Page - STMicroelectronics