STA308 - 8-Channel Digital Audio Processor | STMicroelectronics
MPN： STA308 ✗ 停產STA308 概覽
A digital audio processor is a specialized signal-processing IC that receives digital audio streams, applies channel control and volume functions, and drives digital amplification stages. Within the hierarchy of digital signal processing, it belongs to the DSP and audio-special-purpose IC categories. Its DDX outputs support high-efficiency all-digital amplification when paired with compatible DDX power devices.
The STA308 provides eight 24-bit DDX channels and digital volume control in 0.5 dB steps. The verified source material specifies variable digital gain up to 24 dB in 0.5 dB steps, digital limiter functionality, and input sample-rate support from 32 kHz through 192 kHz. An I2C interface is identified in the available technical data, while the remaining control, clock, data, and DDX signal assignments require the manufacturer pin table for implementation.
This processor targets multichannel consumer-audio systems where digital signal routing, per-channel gain, limiting, and direct digital amplification are useful. Relevant system roles include powered speakers, active soundbars, compact home-theater amplification, digital mixer output conditioning, and multi-zone powered-speaker control. The DDX architecture eliminates a conventional analog power-amplifier input stage when the associated external power devices and firmware are compatible.
Designers should treat the STA308 as part of a tightly coupled digital audio subsystem rather than a standalone codec. The 2.3 V to 2.7 V operating range requires a stable low-noise supply, and all 64 package terminals must be connected or intentionally configured exactly as shown in the manufacturer datasheet. Audio-clock, serial-data, DDX output, control, ground, and decoupling layouts should preserve signal integrity and adequate return paths.
This page combines verified manufacturer and distributor information with practical selection guidance. Pricing reflects the supplied LCSC listing as of 2026-10-23, while lifecycle, detailed electrical limits, complete pin assignments, and true drop-in replacements remain constrained by the available evidence.
直接替換替代品，適用於 STA308 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品STA308 最大額定值與電氣特性
| Product Type | Fully integrated multichannel digital audio processor |
| Number of DDX Channels | 8 channels |
| DDX Processing Resolution | 24 bit |
| Input Sample-Rate Support | 32 kHz to 192 kHz |
| Digital Volume Step | 0.5 dB |
| Variable Digital Gain | 24 dB in 0.5 dB steps |
| Digital Limiter | Supported |
| Minimum Operating Voltage | 2.3 V |
| Maximum Operating Voltage | 2.7 V |
| Control Interface | I2C |
| Package Type | 64-terminal LFQFP |
| Package Dimensions | 10 mm x 10 mm |
| Terminal Count | 64 terminals |
| 安裝類型 | Surface mount |
| Amplification Output Capability | DDX direct digital amplification outputs |
STA308 10 mm x 10 mm 腳位配置指南
STA308（10 mm x 10 mm 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： STA308.
請參閱 資料表 以查看完整腳位配置。
典型應用
STA308 適用於 6 應用s: Powered Speaker Amplification, Digital Active Soundbar, Multichannel Home-Theater Amplifier, Digital Mixer Output Conditioning, Multi-Zone Audio Control, Compact Digital Audio Amplifier.
Powered Speaker Amplification
The STA308 fits an eight-channel powered-speaker design because it provides 8 DDX outputs, 24-bit processing, and digital volume control in 0.5 dB steps. It can receive digital audio streams, apply per-channel gain and limiter functions, and send DDX signals to compatible external power devices. Supporting sample rates from 32 kHz to 192 kHz accommodate conventional and high-resolution sources, while the 2.3 V to 2.7 V processor supply should be isolated cleanly from power-stage routing. Verify external DDX device matching, clocking, thermal margins, and firmware configuration before production release.
推薦
Digital Active Soundbar
A digital soundbar can use the STA308 as its central multichannel audio processor when it requires eight digitally controlled amplification channels. The processor supports 32 kHz through 192 kHz input rates and digital gain up to 24 dB in 0.5 dB increments, which enables system-level volume calibration and limiter control. The integration reduces the need for separate digital volume processors, but channel routing and amplifier selection remain critical. Keep audio clocks and DDX outputs away from switching-node currents, and validate thermal performance across every channel simultaneously.
推薦
Multichannel Home-Theater Amplifier
The STA308 aligns with multichannel home-theater amplification because eight 24-bit DDX channels can organize surround-sound processing into a digitally controlled signal path. Input sample rates from 32 kHz to 192 kHz cover common source formats, and the 0.5 dB volume increments support calibrated listening levels across compatible channels. A practical implementation still requires the correct DDX power-device topology, stable low-noise core supply, and uninterrupted audio-clock routing. Firmware must confirm channel mapping, gain limits, limiter behavior, and mute behavior before amplifier calibration.
推薦
Digital Mixer Output Conditioning
The STA308 can serve as an output-conditioning and control processor for a digital mixer feeding compatible amplification channels. Its digital gain controls extend to 24 dB in 0.5 dB steps, and the integrated limiter functionality supports disciplined level control in multichannel playback systems. The 2.3 V to 2.7 V supply range calls for a dedicated regulator section with local high-frequency decoupling. Use clean digital grounding, separate sensitive analog or reference returns where recommended, and verify all DDX mappings against the mixer routing plan.
推薦
Multi-Zone Audio Control
The STA308 can implement centralized digital gain and limiter control for multi-zone audio when eight independent DDX channels match the system's routing needs. Digital volume increments of 0.5 dB help engineers establish repeatable zone calibration, while support for input rates up to 192 kHz preserves compatibility with high-resolution sources. The implementation must account for synchronization across zones, per-channel delays, fault response, and mute sequencing. Firmware should be tested under maximum gain to prevent limiter or thermal overload in the downstream power devices.
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Compact Digital Audio Amplifier
The STA308 is appropriate for a compact digital audio amplifier architecture that combines a digital control core with external DDX power devices. Eight 24-bit output channels can reduce discrete digital volume and control complexity, while the 64-terminal LFQFP package supports a dense multichannel layout. Density introduces routing constraints: DDX nets must remain short, clock lines must be controlled-impedance, and supply returns must avoid power-stage switching currents. The processor's 2.7 V maximum core voltage must be respected with accurate regulation and transient margin.
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工程參考資料，適用於 STA308 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Brand | STMicroelectronics |
| Package | 64-terminal LFQFP, 10 mm x 10 mm |
| DDX Channels | 8 channels |
| Processing Resolution | 24 bit |
| Input Sample Rate | 32 kHz to 192 kHz |
| Supply Voltage | 2.3 V to 2.7 V |
| Control Interface | I2C |
| Digital Gain | 24 dB in 0.5 dB steps |
| Limiter Function | Digital limiter supported |
| Verified Unit Price | $9.1046 as of 2026-10-23 |
主要差異化特點
- Integrated eight-channel DDX output capability (對比Discrete digital volume processors)
- Broad verified input-rate range (對比Rate-restricted audio paths)
- Fine-grained digital gain and volume control (對比Coarse fixed-gain control)
設計說明
Treat DDX outputs, audio clocks, serial data, control signals, and quiet analog references as separate routing groups. Keep the processor and external DDX power devices physically close enough for controlled routing, but prevent switching-node currents from passing beneath the audio processor ground area. Use short, continuous return planes and follow the complete reference design and pin-specific guidance in the STMicroelectronics datasheet.
The STA308 operates from 2.3 V to 2.7 V, so its core supply must remain inside that range under startup, audio activity, and fault recovery. Place local high-frequency decoupling at the relevant supply pins and provide a low-impedance return to the quiet ground structure. Estimated budget: allowance and transient design are application-specific and require measured rail behavior; no unverified supply-current or capacitor values are assigned here.
Do not substitute the STA308A merely because both products are described as multichannel DDX processors. Confirm mechanical dimensions, all 64 terminal assignments, electrical limits, clocking, control registers, DDX timing, and boot or firmware behavior before replacement. A same-family function description does not establish drop-in compatibility, PCB-level interchangeability, or system equivalence.
Validate clock jitter, data setup and hold margins, channel skew, and DDX output timing at the highest supported sample rate of 192 kHz. Use measurement-probe access that does not materially disturb small-signal nodes, and test the full sequence from idle through maximum digital gain. Poor clock or data routing can create channel misalignment or limiter behavior that is difficult to diagnose from audio output alone.
合規資訊
The supplied product, datasheet-search, and distributor data do not provide explicit compliance declarations for the STA308.
