Digital Audio System 64-Pin LQFP Tray

The STA321 is a single chip solution for digital audio processing applications of up to 4.0 channels.The STA321 is part of the Sound Terminal family that together with the digital power stage provides full digital audio streaming to the speaker, offering cost effectiveness, low energy dissipation and sound enrichment.The STA321 input section consists of two multiplexed stereo analog inputs, a 16-bit ADC and two independent digital input interfaces. The serial audio data input interface accepts all possible formats, including the popular I²S format. There is also a digital output interface fed by the ADC or by the digitally processed signals.

High efficiency FFX class-D modulator

100-dB dynamic range

Two stereo channels with I2S input/output data interface

16-bit stereo ADC input with PGA and microphone biasing

Analog and digital muxing/mixing capability

4-channel input sample rate converter (8 kHz to 192 kHz)

Four channels of 24-bit audio processing

Flexible channel mapping and routing

Output configurations: 2.0 2.1 4.0 Mono

Embedded CMOS bridge: up to 0.5 W/channel

pfStart for pop-free single-ended operations

Play and record simultaneous operation

Pre and post mix stages

Individual channel and master gain/attenuation

Digital gain/attenuation -105 dB to +36 dB in 0.5-dB steps

Soft volume update and muting

DC-blocking selectable high-pass filter

Selectable de-emphasis filter

Up to 13 28-bit user programmable biquads (EQ) per channel

Bass/treble tone control

Ternary, binary or phase shift modulation

PWM output

Headphone output with jack detector

I²C control.