WM8281ECS/R - Low-Power Smart Audio Codec | Cirrus Logic
料号： WM8281ECS/R ✓ 量产中WM8281ECS/R 概述
An audio codec is an integrated circuit that converts analog microphone or line-level signals into digital audio data while converting digital playback streams back into analog audio outputs. The WM8281 belongs to the broader smart-codec hierarchy, combining a conventional audio codec with embedded DSP functions. This integration allows a host processor to handle system control while dedicated hardware executes noise reduction, echo cancellation, speech enhancement, and advanced media processing.
Key product features include programmable DSP cores supporting multi-microphone wideband noise reduction, acoustic echo cancellation, speech enhancement, and advanced media enhancement. The 24-bit SLIMbus interface supports connected audio systems, while the integrated ADC and DAC channels reduce the external analog circuitry required for voice and multimedia products. Its low-power design is intended to benefit always-listening and portable audio equipment where continuous processing must remain energy efficient.
The WM8281 architecture separates audio conversion from programmable signal processing. SLIMbus provides a shared serial link between the codec and a host or audio processor, while the DSP feature set performs real-time voice enhancement. This combination can shorten signal paths and reduce system complexity in applications requiring microphone capture, voice processing, and audio playback through a common codec package.
Typical uses include smartphone and tablet voice-calling systems, headset and wearable audio platforms, smart speakers, teleconferencing equipment, voice-user-interface products, and connected consumer devices. Cirrus Logic markets the device as a low-power smart codec with echo cancellation, making it especially relevant to designs handling near-field or far-field speech where acoustic feedback and ambient noise reduce intelligibility.
Designers should treat the 138-ball wafer-level chip-scale package as a layout-intensive component and follow the manufacturer's recommended land pattern, exposed-pad, power, ground, and high-speed routing guidance. The analog and digital power domains, microphone inputs, codec outputs, and SLIMbus signals must be planned together because power sequencing, decoupling, and acoustic layout can materially affect performance.
This page consolidates verified manufacturer and distributor information about the WM8281ECS/R, identifies the missing technical fields explicitly, and provides application-focused selection guidance without presenting unverified electrical values, pin assignments, pricing, or drop-in replacements as confirmed facts.
直接替换替代料： WM8281ECS/R ——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WM8281ECS/R 最大额定值与电气特性
| Product Type | Low-power smart audio codec |
| DSP Processing | Programmable DSP cores |
| Audio Interface | 24-bit SLIMbus |
| ADC Channels | 6 channels |
| DAC Channels | 8 channels |
| Noise Cancellation | Ambient noise cancellation |
| Echo Cancellation | Acoustic echo cancellation |
| Voice Processing | Multi-microphone wideband noise reduction and speech enhancement |
| Media Processing | Advanced media enhancement |
| 封装 | 138-W-CSP (5.86 mm x 4.56 mm) |
| 安装类型 | Surface mount |
WM8281ECS/R 138-w-csp (5.86 mm x 4.56 mm) 引脚配置指南
WM8281ECS/R（138-w-csp (5.86 mm x 4.56 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： WM8281ECS/R.
请参阅 数据手册 以查看完整引脚配置。
典型应用
WM8281ECS/R 适用于 6 应用s: Smart Speaker and Voice Assistant, Wireless and Wired Headset, Smartphone and Tablet Voice Calling, Teleconference and Video Collaboration, Wearable Voice User Interface, Connected Audio and Media System.
Smart Speaker and Voice Assistant
The WM8281ECS/R fits a smart speaker because it combines 6 ADC channels for multi-microphone capture with a 24-bit SLIMbus link to a host processor and 8 DAC channels for audio playback. Dedicated DSP support for acoustic echo cancellation, ambient noise reduction, and speech enhancement allows voice interaction to remain usable near the loudspeaker. Designers should configure the DSP for the enclosure, microphone spacing, and wake-word system, then validate real-world echo performance because acoustic cancellation depends as much on mechanical design as on the codec.
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Wireless and Wired Headset
The WM8281ECS/R is appropriate for a voice headset that needs microphone acquisition, playback, and speech processing in one low-power package. Its 6 ADC inputs can support multiple microphones used for environmental sensing and voice pickup, while programmable DSP functions address wideband noise reduction and acoustic echo cancellation. SLIMbus allows a compact host-processor connection without a wide parallel bus. Headset developers should prioritize microphone spacing, wind-noise control, and analog front-end design because codec features cannot compensate for poor acoustics.
推荐
Smartphone and Tablet Voice Calling
The WM8281ECS/R supports smartphone and tablet voice calling by providing 6 ADC channels, 8 DAC channels, and a 24-bit SLIMbus interface alongside dedicated echo and noise cancellation. This can reduce host-processor workload while preserving a clear digital audio path between the application processor and codec. The device is particularly relevant to designs with multiple microphones used for beamforming or near-field/far-field voice pickup. Final mobile integration still requires validation of clocking, power sequencing, EMI, and the platform audio framework.
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Teleconference and Video Collaboration
The WM8281ECS/R is suitable for teleconference endpoints where far-field microphones, loudspeaker echo, and room noise can impair intelligibility. The codec’s acoustic echo cancellation and speech enhancement capabilities are intended to reduce those problems while the 24-bit SLIMbus interface carries audio data to a collaboration processor. Its multi-microphone capability allows arrays to support voice selection and spatial processing. Integrators should test cancellation limits against actual room acoustics, speaker volume, and delay because the supplied data does not establish a maximum AEC path or processing latency.
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Wearable Voice User Interface
The WM8281ECS/R can serve as the audio center of a wearable voice interface where limited board area, low power, and microphone count are important constraints. Its 138-W-CSP package measures 5.86 mm by 4.56 mm, while programmable DSP processing handles noise reduction, echo cancellation, and speech enhancement without requiring every algorithm to run on the main application processor. The dense package demands careful ball-out and escape-routing planning, and developers should confirm thermal and electrical limits from the manufacturer documentation before committing a production layout.
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Connected Audio and Media System
The WM8281ECS/R fits connected audio and media products that need low-power playback alongside microphone-based enhancement. Its 8 DAC channels can support multiple outputs, while the 24-bit SLIMbus interface provides a scalable digital connection to an application or network processor. The programmable DSP cores add ambient noise reduction, acoustic echo cancellation, speech enhancement, and advanced media enhancement beyond basic codec conversion. Product teams should allocate separate clean analog and digital routing, validate converter performance against system noise targets, and use the manufacturer’s reference layout for the 138-W-CSP footprint.
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推荐产品汇总
工程参考数据： WM8281ECS/R ——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 | 138-W-CSP (5.86 mm x 4.56 mm) |
| Brand | Cirrus Logic |
| Audio Interface | 24-bit SLIMbus |
| ADC Channels | 6 channels |
| DAC Channels | 8 channels |
| DSP Processing | Programmable DSP cores |
| Noise Reduction | Multi-microphone wideband noise reduction |
| Echo Cancellation | Acoustic echo cancellation |
| Speech Processing | Speech enhancement and advanced media enhancement |
| Power Class | Low-power smart codec |
关键差异点
- Integrated voice-processing DSP （对比 A basic audio codec without the WM8281 feature set)
- Expanded converter-channel count （对比 A two-channel conventional audio codec)
- Host-oriented digital audio interface （对比 A parallel-interface audio codec)
- Purpose-built acoustic processing （对比 A host-processor-only software audio path)
设计说明
Treat the 138-W-CSP as a high-density layout component and use the current Cirrus Logic recommended land pattern, ball map, and reflow profile without modification. Place input, output, power, and ground connections according to the manufacturer reference design. The verified package dimensions are 5.86 mm by 4.56 mm, but those dimensions alone are insufficient to reproduce the land pattern safely.
Route SLIMbus clock, data, and signal lines as a compact, controlled digital bus while keeping sensitive microphone and codec-output analog paths away from switching nodes and high-current return paths. Separate analog and digital ground planning only as directed by the manufacturer datasheet. Validate the final six-ADC and eight-DAC channel assignments against the device pinout before routing.
Do not assume that acoustic echo cancellation alone guarantees a usable voice system. Microphone placement, enclosure acoustics, loudspeaker-to-microphone delay, gain structure, and DSP tuning remain critical design variables. Use representative mechanical prototypes to verify far-field capture, double-talk behavior, wind noise, and echo suppression before production release.
Confirm analog and digital supply limits, sequencing requirements, and decoupling recommendations from the manufacturer datasheet because none of those numerical electrical values were supplied in the verified excerpts. Place required bypass capacitors at their specified pins and keep the SLIMbus and analog returns quiet. Do not substitute generic capacitor or power-layout rules for the application-specific guidance in the Cirrus Logic documentation.
合规信息
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements were included in the supplied verified data. These fields remain unknown rather than being inferred from general distributor availability.
