The STA321MP is a four-channel digital audio system with an FFX™ driver. It features a high efficiency FFX™ class-D modulator, 100 dB dynamic range, two stereo channels with I²S input/output data interface, a 16-bit stereo ADC input with PGA and microphone biasing, a PDM input interface for MEMS microphones connection, analog and digital muxing/mixing capability, an eight-channel input sample rate converter (8 kHz to 192 kHz), four channels of 24-bit audio processing, flexible channel mapping and routing, various output configurations (2.0, 2.1, 4.0, Mono), an advanced four-channel programmable audio processor, including embedded CMOS bridge, pfStart for pop-free single-ended operations, dynamic range compressor, 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, selectable DC-blocking high-pass filter, selectable de-emphasis filter, up to 13 28-bit user programmable biquads (EQ) per channel, advanced noise-shaping technologies enabling low frequencies optimized processing, bass/treble tone control, ternary, binary or phase shift modulation, PWM output, headphone output with jack detector, and I²C control.
The STA321MP is a single-chip solution for digital audio processing applications supporting up to four channels. It features a high-efficiency FFX class-D modulator, a 16-bit stereo ADC with PGA, and a PDM input interface for MEMS microphones. The device includes advanced digital processing capabilities such as sample rate conversion, dynamic range compression, and up to 13 programmable 28-bit biquads per channel for equalization.
| Channels | Four-channel |
|---|---|
| Modulator Type | FFX class-D |
| Dynamic Range | 100 dB |
| ADC Input | 16-bit stereo |
| Microphone Interface | PDM |
| Audio Processing Channels | Four channels |
| Biquads per Channel | Up to 13 |
| Digital Gain Range | -105 dB to +36 dB |
| Package | VFQFPN2 56 |
| Package Dimensions | 8 mm x 8 mm |
The embedded CMOS bridge supplies up to 0.5 W into an 8 Q load and 70 mW into a 16 Q load for the headphones output.
The device comes in a 56-pin, 8 mm x 8mm, VFQFPN2 package.
Digital gain or attenuation ranges from -105 dB to +36 dB in 0.5 dB steps.