CS5331A-DS - 18-Bit Stereo Audio ADC | Cirrus Logic
部品番号: CS5331A-DS ✓ 生産中CS5331A-DS 概要
A stereo audio ADC is a mixed-signal semiconductor that converts left and right analog audio signals into digital words for processing, storage, transmission, or playback. The CS5331A belongs to the ADC hierarchy that includes delta-sigma converters, audio data converters, interface ICs, and broader signal-processing semiconductors. Its integrated filtering reduces the need for a separate external anti-alias filter in conventional audio signal chains.
The CS5331A-DS uses delta-sigma modulation with 128-times oversampling, followed by digital filtering and decimation. This architecture supports 18-bit output values for both stereo channels. Its linear-phase digital filter has a passband to 21.7 kHz, 0.05 dB passband ripple, and greater than 80 dB stop-band rejection. A high-pass filter removes DC offsets from the analog input path.
The integrated filtering architecture is the central technical advantage of this converter. Oversampling and digital decimation move much of the frequency-domain filtering burden inside the IC, while the 21.7 kHz linear-phase passband targets the useful audio range. The 0.05 dB passband ripple supports flat in-band response, while greater than 80 dB stop-band rejection reduces high-frequency alias energy. These characteristics make the device suitable for compact digital-audio equipment where external filter complexity must be minimized.
Typical uses include consumer digital-audio equipment, multimedia and communication systems, audio capture modules, and stereo line-level signal-chain interfaces. The left and right inputs allow simultaneous conversion of a stereo pair, while the integrated anti-alias filtering simplifies board design. Exact input range, sampling-rate limits, clock requirements, and interface details should be confirmed from the manufacturer datasheet before final circuit design.
Designers should preserve the recommended analog input and decoupling layout, route digital clock and data signals away from sensitive audio inputs, and follow the pin-description table in the manufacturer datasheet when assigning PCB tracks. Power and ground connections should be implemented with low-impedance planes or short paths. Adequate filtering outside the converter may still be required when the source contains out-of-band energy or unusually high levels of ultrasonic interference.
This page combines the manufacturer-family specifications, package information, application guidance, and validated cross-reference findings for the CS5331A-DS. It also distinguishes verified drop-in family options from parts that would require redesign, helping engineers narrow an audio-converter selection without overlooking filtering, channel-count, or package constraints.
ドロップイン代替品: CS5331A-DS — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
CS5331A-BS
✅ ドロップイン📋 参考代替品（カタログ未掲載）
CS5331A-DS 最大定格＆電気的特性
| Converter Type | Stereo analog-to-digital converter |
| Output Resolution | 18 bit |
| Number of Channels | 2 channels |
| Conversion Architecture | Delta-sigma modulation |
| Oversampling Ratio | 128 times |
| Digital Filter | Linear-phase digital filter with decimation |
| Passband Edge | 21.7 kHz |
| Passband Ripple | 0.05 dB |
| Stop-Band Rejection | Greater than 80 dB |
| DC Offset Removal | Integrated high-pass filter |
| External Anti-Alias Filter | Not required according to the manufacturer documentation |
| ピン数 | 8 pins |
| パッケージ | 8-pin surface-mount package |
CS5331A-DS 8-pin surface-mount package ピン配置ガイド
CS5331A-DS (8-pin surface-mount package パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: CS5331A-DS.
詳細は データシート をご参照ください。
主な用途
CS5331A-DS の用途: 6 件s: Consumer Digital-Audio Equipment, Multimedia Audio Capture, Communication and Voice Equipment, Audio Interface Modules, Instrumentation and Measurement, Stereo Line-Level Signal Acquisition.
Consumer Digital-Audio Equipment
The CS5331A-DS fits consumer digital-audio equipment requiring simultaneous conversion of left and right analog channels. Its 18-bit resolution and stereo architecture preserve the format expected by digital-audio processing paths, while the 21.7 kHz linear-phase passband covers the principal audio bandwidth. The internal 128-times oversampling and digital decimation also reduce the need for a separate anti-alias filter, which can simplify board partitioning and shorten the analog input path. Confirm the required digital interface, clock arrangement, and sampling rate against the manufacturer datasheet before laying out the final PCB.
おすすめ
Multimedia Audio Capture
The CS5331A-DS is appropriate for multimedia audio-capture modules that convert a stereo analog source into 18-bit digital audio data. Its integrated delta-sigma modulator, digital filter, and decimation stages provide a compact conversion path with a passband to 21.7 kHz and stop-band rejection greater than 80 dB. This can reduce the number of discrete filter components around the converter, although board designers should still assess source-specific interference, clock jitter, grounding, and analog signal levels before finalizing the circuit.
おすすめ
Communication and Voice Equipment
The CS5331A-DS can serve as the stereo conversion stage in communication equipment where two analog channels must become digital audio data. Its 18-bit stereo architecture and integrated high-pass filter for DC-offset removal support practical line-level capture arrangements. The 0.05 dB passband ripple helps maintain amplitude consistency across the 21.7 kHz passband, while the greater-than-80 dB stop-band rejection suppresses unwanted high-frequency content after decimation. The exact gain structure, input range, and supported sampling rates should be confirmed from the manufacturer datasheet.
おすすめ
Audio Interface Modules
The CS5331A-DS is well suited to compact stereo audio interface modules that combine analog capture with digital processing. Its 128-times oversampling and integrated decimation filter move filtering into the converter, while the linear-phase response reaches 21.7 kHz. The architecture is useful when an external anti-alias network would increase component count or board area. Keep the left and right analog traces short, maintain symmetrical routing, and follow the manufacturer's power and ground recommendations to avoid converter noise or channel imbalance.
おすすめ
Instrumentation and Measurement
The CS5331A-DS can be used in audio-oriented instrumentation that requires a low-noise digital representation of two analog waveforms. The 18-bit resolution provides ample numerical headroom for common audio-capture applications, while the internal high-pass filter removes DC offsets. Its integrated anti-alias filtering supports predictable behavior when the analog bandwidth approaches the 21.7 kHz passband. Instrumentation designs should still define gain, input coupling, reference clock source, and digital-data handling in accordance with the manufacturer interface requirements.
おすすめ
Stereo Line-Level Signal Acquisition
The CS5331A-DS supports stereo line-level signal acquisition when both left and right analog inputs require independent conversion. Its simultaneous 18-bit stereo conversion reduces the need for duplicated converter channels, and the integrated decimation filter provides defined attenuation beyond the 21.7 kHz passband. Input conditioning remains a system-level responsibility, so designers should establish suitable signal amplitude, termination, and protection before the converter pins. A symmetrical analog layout is recommended to minimize gain and timing differences between the two channels.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: CS5331A-DS — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | CS5331A-BS |
|---|---|---|
| Package | SOIC-8 | SOIC-8 |
| Brand | Cirrus Logic | Cirrus Logic |
| Converter Type | Stereo analog-to-digital converter | Stereo analog-to-digital converter |
| Output Resolution | 18 bit | 18 bit |
| Number of Channels | 2 channels | 2 channels |
| Oversampling Ratio | 128 times | 128 times |
| Passband Edge | 21.7 kHz | 21.7 kHz |
| Passband Ripple | 0.05 dB | 0.05 dB |
| Stop-Band Rejection | Greater than 80 dB | Greater than 80 dB |
主な差別化要因
- Integrated stereo conversion and filtering reduce external circuitry （vs CS5331A-BS)
- Defined linear-phase audio filtering （vs CS5331A-BS)
- On-chip DC-offset removal （vs CS5331A-BS)
設計ノート
Keep the left and right analog input paths short, symmetrical, and physically separated from digital clock and data routing. Place the converter's required bypass and decoupling capacitors close to their associated pins, and use a low-impedance ground-plane arrangement. Follow the manufacturer layout artwork and pin-description table because package orientation and exposed routing requirements can affect noise and channel balance.
Treat the digital clock as a high-speed signal even though this converter uses oversampling and decimation. Use a low-jitter source, minimize clock-trace length, avoid stubs, and provide a continuous return path beneath the route. Poor clock quality can degrade conversion performance or shift the digital output spectrum, while crosstalk from data lines can increase converter noise.
Do not assume that integrated anti-alias filtering eliminates every input-network requirement. Confirm the allowed analog input range, source impedance, clock configuration, and digital output format in the manufacturer datasheet. Include appropriate input protection and gain conditioning, and avoid driving either analog channel beyond the documented limits when the circuit is connected or powered.
コンプライアンス情報
No specific RoHS, REACH, halogen-free, or conflict-minerals declaration was identified for this ordering code.
