STA321MPL - 6-Channel 24-Bit Audio DSP | STMicroelectronics
料号： STA321MPL ✓ 量产中STA321MPL 概述
A digital microphone processor is a specialized audio interface and signal-processing IC. It accepts digital microphone data through PDM interfaces, combines or processes those streams, and routes them into a larger audio system. Within the product hierarchy, the STA321MPL belongs to the audio special-purpose IC class and functions as a configurable digital audio processor rather than a conventional power amplifier or general-purpose microcontroller.
Principal features include 6 PDM microphone channels, 2 virtual digital audio channels, and 24-bit resolution. The 64-terminal package provides the mixed-signal, control, clock, data, and power connections required for a multi-microphone audio design. Commercial-grade temperature operation, a 3.3 V supply identified in distributor data, and a low-profile surface-mount format make the device suitable for consumer audio equipment such as soundbars, smart displays, home-audio systems, and compact voice-assisted products.
The part's processing resources allow multiple digital microphones to be combined before transmission to a host codec or application processor. This architecture can reduce microphone-count-related wiring complexity while providing a consistent digital-audio data path. The 24-bit processing format preserves high numerical resolution, although achievable microphone and system signal-to-noise performance also depends on the selected microphones, clocks, power design, decoders, and software configuration.
Typical uses include beamforming microphone arrays, conference-room audio, smart-home voice terminals, display soundbars, and compact stereo or 2.1 entertainment systems. Designers should use the manufacturer datasheet and reference configuration to map clocks, PDM inputs, digital audio outputs, control interfaces, and supply rails. Exact operating limits, clock frequencies, output formats, and pin-level functions must be confirmed from the full datasheet before layout or firmware release.
Power and layout planning should account for all 64 connections even when some application-specific pins are unused. Keep digital audio routing short, maintain a continuous ground reference, isolate noisy power paths from sensitive audio circuitry, and validate timing margins between the processor, microphones, and downstream codec. This page consolidates verified distributor specifications, sourcing information, and practical integration guidance into a design-focused component record.
直接替换替代料： STA321MPL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料STA321MPL 规格参数
| Product Type | Scalable digital microphone processor |
| PDM Input Channels | 6 channels |
| Virtual Digital Audio Channels | 2 channels |
| Audio Processing Resolution | 24-bit |
| Audio Channel Configuration | 8 channels |
| Power Supply Voltage | 3.3 V |
| 工作温度范围 | 0 C to +70 C |
| Temperature Grade | Commercial |
| 封装 | PQFP64, TQFP-64 (10 x 10 mm) |
| Terminal Count | 64 terminals |
| Terminal Form | Gull wing |
| Package Shape | Square |
| 安装类型 | Surface mount |
| 分类 | Consumer circuit |
| Manufacturer | STMicroelectronics |
| Sample Availability | In stock at LCSC |
STA321MPL square 引脚配置指南
STA321MPL（square 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： STA321MPL.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STA321MPL 适用于 6 应用s: Smart Display Microphone Array, Conference Room Voice Capture, Soundbar Voice Assistant, Home Audio Voice Control, USB Audio Microphone Product, Digital Speaker Voice Control.
Smart Display Microphone Array
The STA321MPL fits smart displays that combine voice capture with local audio processing because it provides 6 PDM channels, 2 virtual digital audio channels, and 24-bit processing in a 64-pin TQFP package. The device can receive digital data from several PDM microphones and present configurable channels to a host codec or application processor. Its verified 3.3 V supply simplifies integration with digital audio systems, although clock-source allocation, microphone MCLK/LRCLK routing, and signal-to-noise performance must be validated in the final acoustic design.
推荐
Conference Room Voice Capture
The STA321MPL is suitable for conference-room endpoints requiring several digital microphones to feed a common processing path. Its 6 PDM inputs avoid treating each microphone as an unrelated analog source, while the 2 virtual digital audio channels support additional configurable stream handling. The 24-bit format preserves numerical headroom for downstream beamforming or mixing, but real acoustic performance depends on microphone placement and synchronization. Designers should confirm clock-sharing requirements and all 64 package connections in the manufacturer datasheet before committing the layout.
推荐
Soundbar Voice Assistant
The STA321MPL supports soundbar voice-assistant designs that need multi-microphone capture before classification or wake-word processing. Its six PDM channels can reduce parallel analog microphone infrastructure, and its two virtual digital audio channels provide additional routing flexibility. The 24-bit processing resolution is appropriate for maintaining signal headroom through a digital microphone array. Because the processor operates from 3.3 V, it can share a digital supply domain with the surrounding audio system, but clock jitter, PDM data validity, and grounding remain critical acoustic-design considerations.
推荐
Home Audio Voice Control
The STA321MPL can be used in networked home-audio products that accept commands through digital microphones while also distributing entertainment audio. Its 6 PDM channels accommodate multi-microphone configurations, and the 24-bit internal processing path supports high-resolution digital audio handling. The commercial 0 C to +70 C temperature range aligns with many indoor consumer products. Integration still requires careful separation of microphone and speaker power paths, controlled MCLK distribution, and firmware setup that matches the selected digital microphones and downstream codec.
推荐
USB Audio Microphone Product
The STA321MPL is applicable to USB microphones that use PDM sensing elements and require digital processing before a USB audio interface. Its six PDM inputs allow multiple microphones to share a digital transport, while the two virtual channels can support configurable routing or monitoring behavior. The 24-bit capability is valuable for preserving source resolution during digital mixing. Designers must verify supported microphone data rates, host clocking, and the exact digital-audio output interface in the datasheet, because those details are not included in the supplied distributor snippets.
推荐
Digital Speaker Voice Control
The STA321MPL can serve as the microphone-processing element in digital speakers that combine far-field voice capture with conventional amplified playback. The six PDM inputs support an array of digital microphones, while the two virtual audio channels provide additional flexibility for routing voice data separately from program audio. Its 24-bit processing format suits high-resolution digital audio chains. The system must still account for the difference between microphone and speaker clocks, maintain clean analog separation near power amplifiers, and validate acoustic echo performance at the finished product level.
推荐
推荐产品汇总
工程参考数据： STA321MPL ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | PQFP64, TQFP-64 (10 x 10 mm) |
| Brand | STMicroelectronics |
| Product Type | Scalable digital microphone processor |
| PDM Channels | 6 channels |
| Virtual Digital Audio Channels | 2 channels |
| Audio Resolution | 24-bit |
| Audio Configuration | 8 channels |
| Supply Voltage | 3.3 V |
| Operating Temperature | 0 C to +70 C |
| Terminal Count | 64 terminals |
关键差异点
- Six dedicated PDM input channels （对比 STA321)
- Configurable virtual digital-audio channels （对比 STA326)
- Documented 24-bit processing architecture （对比 STA328)
设计说明
Keep all 64-pin routing and the exposed-pad or thermal-pad connection consistent with the selected package drawing. Place input and output decoupling capacitors close to their associated power pins, maintain a low-impedance ground plane, and route PDM clock and data traces away from switching nodes and loudspeaker-amplifier outputs. Because the supplied records do not identify every power pin or the exposed-pad connection, use the manufacturer datasheet as the authoritative land-pattern and assembly reference.
PDM microphones require accurate clock and data timing, so distribute MCLK and related clock signals through controlled-impedance routes with minimal stubs and via transitions. Match clock source characteristics to the microphone and processor requirements stated in the manufacturer datasheet. Series termination may be considered for exposed clock edges after signal-integrity simulation. Maintain short return paths for every digital-audio trace and place analog microphone references directly beside their associated converter pins.
The verified supply is 3.3 V, but the regulator must still provide adequate transient current and low noise for digital microphones, clocks, and processing logic. Separate or locally isolate switching-regulator stages from microphone and clock supplies, and verify capacitor selection against the datasheet's recommended network. Do not infer allowable input tolerance, internal rail sequencing, or decoupling values from distributor data; obtain those values from the full manufacturer datasheet before releasing the power design.
The most common design errors are assigning incompatible microphone clock rates, confusing PQFP, TQFP, and LQFP-EPD variants, and treating related family members as automatic pin-compatible replacements. Use the exact ordering code and package drawing during BOM review. Also verify exposed-pad soldering, unused-pin treatment, and software configuration independently of the hardware schematic. The supplier snippets identify channel and resolution features but do not provide a complete pin-function table.
合规信息
The supplied records identify the part as a commercial consumer-circuit IC but do not provide verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. AEC-Q100 is not applicable to the identified commercial-grade application, but no automotive qualification status is claimed.
