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.
Embedded CMOS bridge: up to 0.5 W/channel
Play and record simultaneous operation
pfStart for pop-free single-ended operations
Individual channel and master gain/attenuation
Pre and post mix stages
Soft volume update and muting
Digital gain/attenuation -105 dB to +36 dB in 0.5-dB steps
DC-blocking selectable high-pass filter
Up to 13 28-bit user programmable biquads (EQ) per channel
Selectable de-emphasis filter
Ternary, binary or phase shift modulation
Bass/treble tone control
Headphone output with jack detector
Four channels of 24-bit audio processing
4-channel input sample rate converter (8 kHz to 192 kHz)
High efficiency FFX class-D modulator
Two stereo channels with I2S input/output data interface
100-dB dynamic range
Analog and digital muxing/mixing capability
Flexible channel mapping and routing
16-bit stereo ADC input with PGA and microphone biasing