company blog about Mingjiada Supplies STMicroelectronics’ STA321—a Highly Integrated 4-Channel Digital Audio System with FFX™ Drivers

Shenzhen Mingjiada Electronics Co., Ltd. maintains a long-term stock of STMicroelectronics’ STA321, a single-chip solution designed for multichannel digital audio processing. Part of the ST Sound Terminal™ series, it works in conjunction with a digital power stage to enable end-to-end digital audio streaming from the source to the speakers, offering a combination of cost-effectiveness, low power consumption, and enhanced audio quality.

STA321 Key Product Features

High-Efficiency FFX™ Class D Modulation

The STA321 incorporates a high-efficiency FFX™ (Full Flexible Amplification) Class D modulator that supports ternary, binary, or phase-shift modulation modes, significantly reducing system power consumption while ensuring excellent sound quality.

Flexible Channel Configuration and Audio Processing

Supports multiple output configurations including 2.0, 2.1, 4.0, and Mono

4-channel 24-bit audio processing; the sample rate converter supports input rates from 8 kHz to 192 kHz

100 dB dynamic range ensures high-fidelity audio output

Up to 13 28-bit user-programmable second-order filters (EQ) per channel, supporting fine-tuned sound adjustment

Built-in bass/treble tone control, DC-blocking high-pass filter, and de-emphasis filter

Extensive input/output interfaces

Dual stereo I2S input/output data interfaces, compatible with mainstream digital audio formats

16-bit stereo ADC input with integrated PGA (programmable gain amplifier) and microphone bias

Analog and digital multiplexing/mixing capabilities, supporting flexible channel mapping and routing

Digital output interfaces can be fed by signals from the ADC or post-digital processing

Embedded Drivers and Convenient Features

Built-in CMOS bridge drivers, capable of driving up to 0.5W per channel (8Ω load), and capable of directly driving headphones (70mW@16Ω)

pfStart™ technology: Enables pop-free single-ended operation

Supports simultaneous playback and recording

Independent channel and master gain/attenuation controls, with a digital gain range of -105 dB to +36 dB in 0.5 dB steps

Soft volume update and mute control; headphone output with jack detection

I²C control interface for easy system integration and management

STA321 Technical Specifications Overview

Manufacturer: STMicroelectronics

Product Series: Sound Terminal™

Number of Channels: 4 channels (configurable as 2.0/2.1/4.0/Mono)

Dynamic Range: 100 dB

Audio Processing Precision: 24-bit

Supported Sampling Rates: 8 kHz to 192 kHz

Supply Voltage: 3V ~ 3.6V

Operating Temperature: 0°C ~ 70°C

Package Type: LQFP-64

RoHS Compliant: Yes

STA321 Typical Applications

Soundbars and multi-channel audio systems

Built-in audio processing for smart TVs and projectors

Portable Bluetooth/wireless speakers

Audio processing for in-vehicle infotainment systems

Preamplifiers for professional audio equipment

Mingjiada’s Supply Advantages

Shenzhen Mingjiada Electronics Co., Ltd., established in 1996, has been deeply involved in the electronic component distribution sector for nearly three decades. The company has obtained ISO 9001:2014 and ISO 14001:2014 management system certifications and is an authorized independent distributor for leading international brands such as ST. The company maintains over 2 million SKUs in stock, covering the full range of product categories including audio ICs, power management, MCUs, and FPGAs, and offers customers:

Guarantee of Genuine Products: All products are traceable to the original manufacturer’s supply chain

Rapid Delivery from Stock: Warehouses in Shenzhen, Hong Kong, and other locations support immediate shipment

One-Stop Order Fulfillment Service: Full-process support from product selection to mass production supply

For detailed information on the STA321 product, to request a quote, or to order samples, please contact the Mingjiada Electronics sales team.