CS4221-KS - 24-Bit Stereo Audio Codec | Cirrus Logic
MPN： CS4221-KS ✗ 停產CS4221-KS 概覽
An audio codec is an interface IC that converts analog audio signals into digital data and digital audio data back into analog signals. Within the broader semiconductor hierarchy, a codec belongs to the audio interface and signal-conversion class of integrated circuits. The CS4221-KS therefore serves as the bridge between an external digital audio processor or controller and external analog input and output circuitry, rather than functioning as a complete audio playback system by itself.
The principal verified features include 24-bit resolution, simultaneous stereo ADC and DAC functionality, a 3 V interface, serial digital connectivity, and a maximum stated sampling frequency of 50 kHz. These attributes suit equipment requiring compact digital-audio conversion at a conventional CD-oriented sample rate. The integrated stereo topology also helps minimize the number of external converter channels required in a stereo design, although the application still needs suitable input and output analog circuitry.
The CS4220 and CS4221 family uses delta-sigma conversion, according to the manufacturer datasheet summary reproduced by the verified search results. Delta-sigma conversion shapes quantization noise into a digitally filtered form, supporting the device's stated 24-bit resolution. The available verified snippets do not expose the internal architecture, clock requirements, analog performance metrics, or digital interface mode in sufficient detail to characterize the converter further without unsupported assumptions.
Typical uses include professional and consumer stereo audio equipment, digital mixing equipment, sound-card circuitry, multimedia appliances, and embedded audio systems that require both record and playback channels. The same 50 kHz limitation that makes the codec suitable for conventional stereo audio applications also makes it less appropriate for designs needing higher-rate professional audio, unless the complete system requirements are limited to 50 kHz.
When laying out a CS4221-KS design, analog signal routing should be kept separate from digital clock and serial-data paths, and the power, ground, and bypass connections must follow the manufacturer's recommended application circuit. Because the supplied verified data does not include a complete pin table or decoupling values, engineers should verify pin assignments and recommended passive values against the official Cirrus Logic datasheet before release to production.
This page consolidates the verified distributor specifications, package information, lifecycle observations, source links, selection guidance, and engineering considerations for CS4221-KS. It also distinguishes confirmed characteristics from parameters that require direct confirmation from the manufacturer datasheet, helping procurement and design teams avoid treating incomplete distributor metadata as a complete electrical specification.
直接替換替代品，適用於 CS4221-KS — 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CS4221-KS 最大額定值與電氣特性
| Product Type | Stereo audio codec |
| Converter Resolution | 24 bit |
| ADC Channels | 2 stereo channels |
| DAC Channels | 2 stereo channels |
| Maximum Sampling Frequency | 50 kHz |
| Digital Interface Supply | 3 V |
| Digital Interface | Serial |
| Conversion Method | Delta-sigma conversion |
| 封裝 | 28-pin SSOP, 0.209 inch / 5.30 mm width |
| 安裝類型 | Surface mount |
| RoHS Compliance | unknown |
| REACH Compliance | unknown |
| AEC-Q100 Qualification | not_applicable |
CS4221-KS 28-pin ssop, 0.209 inch / 5.30 mm width 腳位配置指南
CS4221-KS（28-pin ssop, 0.209 inch / 5.30 mm width 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： CS4221-KS.
請參閱 資料表 以查看完整腳位配置。
典型應用
CS4221-KS 適用於 6 應用s: Stereo Digital Audio Recording, Stereo Audio Playback, Digital Sound Card, Digital Mixing Console, Multimedia Audio Appliance, Embedded Audio Control System.
Stereo Digital Audio Recording
The CS4221-KS fits stereo recording equipment because it combines two analog-to-digital conversion channels with a verified 24-bit resolution and a maximum sampling rate of 50 kHz. The codec can accept left and right analog inputs, convert them through delta-sigma stages, and provide serial digital audio data to a processor or storage controller. This integration reduces the need for separate mono ADC pairs. Designers should preserve analog-signal isolation from digital clock lines and verify the required input gain structure, anti-alias filtering, and clock arrangement in the manufacturer application circuit.
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Stereo Audio Playback
For stereo playback, the CS4221-KS uses its integrated digital-to-analog converters to turn serial digital audio into left and right analog outputs. The verified 24-bit converter resolution supports conventional digital-audio signal paths, while the 50 kHz maximum rate covers applications that do not require higher-rate professional formats. The implementation must include the output reconstruction filtering and analog output stage prescribed by the datasheet. Short analog traces, stable references, and adequate return paths are especially important because converter performance can be undermined by noisy or poorly decoupled supply rails.
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Digital Sound Card
The CS4221-KS is applicable to a stereo sound-card architecture that requires simultaneous capture and playback. Two ADC channels provide recording input, two DAC channels provide playback output, and the serial interface connects the converter to a digital audio controller. Its 50 kHz ceiling suits conventional voice and media-audio workloads but is a decisive constraint for high-resolution multichannel recording. The board should separate microphone or line-input routing from headphone or line-output routing, minimize analog crosstalk, and place bypass capacitance close to the device's supply pins according to the datasheet layout guidance.
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Digital Mixing Console
A digital mixing console can use the CS4221-KS for local stereo conversion when it needs a compact 24-bit input and output path at up to 50 kHz. Integrated ADC and DAC channels reduce board area compared with separate converter packages, while the serial interface allows connection to a mixing engine or control processor. Signal-chain design must account for the codec's supported sample rate and interface timing. Level management, input protection, and output impedance belong in the surrounding analog circuitry rather than being assumed to be provided internally by the codec.
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Multimedia Audio Appliance
The CS4221-KS suits a multimedia appliance that records and plays conventional stereo audio while using a 3 V digital interface. Its integrated 24-bit ADC and DAC channels simplify connection between analog transducers and a digital media processor. The 50 kHz sampling limit aligns with many speech, control-panel, and legacy media applications, though it does not support higher-rate modern audio without a different codec. Power-supply planning and analog grounding remain critical because converter and digital sections share a compact package, and system-level power consumption was not supplied in the verified data.
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Embedded Audio Control System
An embedded industrial audio controller can use the CS4221-KS when it requires a local stereo capture and playback function without a separate host codec. The serial interface supports integration with a digital controller, while the 24-bit converters provide a single-package conversion path. Because the supplied evidence does not specify supported serial modes, framing, master-clock ratios, or latency, the system architect should confirm those points before assigning signal timing. Digital communications and switching regulators should be routed away from analog pins, and unused digital inputs should be handled exactly as directed in the verified pin table.
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推薦產品摘要
工程參考資料，適用於 CS4221-KS — 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 |
|---|---|
| Package | 28-pin SSOP |
| Brand | Cirrus Logic |
| Product Type | Stereo audio codec |
| Converter Resolution | 24 bit |
| ADC Configuration | Stereo ADC |
| DAC Configuration | Stereo DAC |
| Maximum Sampling Frequency | 50 kHz |
| Digital Interface | 3 V serial interface |
| Conversion Method | Delta-sigma |
主要差異化特點
- Integrated bidirectional stereo conversion (對比CS4216-KL)
- Documented 24-bit resolution (對比CS4297-JQ)
- 3 V serial interface integration (對比WM8762CGED)
- 50 kHz sampling-rate fit (對比WM8523GEDT)
設計說明
Separate the analog input and output paths from serial data, clock, and control traces. Route analog signals over a continuous ground plane, keep digital return currents away from sensitive converter inputs, and avoid sharing narrow necks between analog and digital sections. Exact trace geometry and ground topology should follow the manufacturer's recommended layout because the supplied excerpts do not provide a verified reference layout or pin table.
Provide the documented supply rails and place bypass capacitors close to the corresponding device pins. The verified data confirms a 3 V interface but does not establish the analog rail, permissible supply sequencing, capacitor values, or operating current. Verify those details in the current Cirrus Logic datasheet and power-tree constraints before PCB release; a generic decoupling network should not substitute for the manufacturer recommendation.
Do not assume that the CS4221 and CS4220 names are interchangeable or that any similarly packaged codec is pin-compatible. The supplied evidence only confirms that both belong to the same stereo 24-bit delta-sigma family. Obtain exact pin assignments, clock requirements, interface modes, and analog specifications for the exact ordering code. Also avoid assuming current production from distributor listings; the verified datasheet index associates this device with obsolete status and aftermarket channels.
Treat the serial digital audio and clock signals as potentially high-speed signals even though the maximum audio sample rate is 50 kHz. Confirm edge rates, voltage levels, bus topology, and supported framing from the manufacturer data before calculating termination or trace length. Keep clock routing short, provide a continuous reference plane, and observe any required separation from analog outputs to reduce coupling into the recording path.
合規資訊
The supplied verified search results do not provide product-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. No compliance attributes were inferred from the manufacturer, package, or distributor listings.
