CS5331A-KSZ - 18-Bit Stereo Audio ADC SOIC-8 | Cirrus Logic
部品番号: CS5331A-KSZ ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.4 | $44.00 |
| 100 | $3.8 | $380.00 |
| 500 | $3.25 | $1,625.00 |
| 1,000 | $2.9 | $2,900.00 |
CS5331A-KSZ 概要
A sigma-delta ADC (analog-to-digital converter) is a type of data converter that uses oversampling and noise shaping to achieve high resolution from a relatively simple analog front end. In the broader component hierarchy, a sigma-delta ADC sits within ADC/DAC converter chips, which are part of the data converter family, which in turn belongs to the signal chain and mixed-signal semiconductor category. The stereo attribute means the device integrates two independent conversion channels in a single die, making it well suited to consumer and prosumer audio capture where PCB area and BOM cost matter more than absolute laboratory precision.
Key features of the CS5331A-KSZ include two simultaneous sampling sigma-delta modators per channel, integrated digital decimation filtering, an internal voltage reference, and a serial audio data output. The device typically operates from a single 5 V analog supply and draws low power suitable for portable recording equipment, USB audio interfaces, set-top boxes, and A/V receivers.
The CS5331A architecture combines a multi-bit switched-capacitor sigma-delta modulator for each channel with on-chip digital decimation filters that produce the final 18-bit audio samples at standard audio sampling rates. This topology trades analog complexity for digital complexity and yields strong power-supply rejection at audio-band frequencies, allowing the converter to be fed directly from modestly regulated rails without compromising dynamic range.
Typical applications include consumer digital audio recording such as DAT, CD-R, MD, and multimedia PC audio capture, automotive head-unit auxiliary inputs, set-top box digital audio outputs, and low-cost USB audio interfaces for streaming and podcasting.
When designing with the CS5331A-KSZ, observe the standard sigma-delta grounding and decoupling practice: separate analog and digital ground returns joined at one point, place 10 uF plus 0.1 uF decoupling close to each supply pin, and keep the MCLK source clean because jitter at the master clock input directly degrades achievable dynamic range.
This page synthesizes distributor stock, parametric alternatives in the same SOIC-8 footprint, and practical layout guidance that go beyond what the manufacturer datasheet alone provides, helping procurement engineers, design engineers, and hobbyists evaluate the CS5331A-KSZ for audio ADC replacement, new design, and cross-reference tasks.
ドロップイン代替品: CS5331A-KSZ — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: CS5331A-KSZ （同一形状・フットプリント） — 相違点: Number of Channels, Package, Resolution, Converter Type, Data Interface.
クイック比較ツール — 並列比較する代替部品を選択:
CS5330A-KSZ
✅ ドロップイン✓ 在庫あり
$2.75 / 個
データシートを見る →CS5331A-KS
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
CS5331A-DSZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$4.85 / 個
データシートを見る →CS5331A-DSZR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
CS5331A-KSZR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
CS5331A-KSZ 最大定格＆電気的特性
| Manufacturer | Cirrus Logic |
| Part Number | CS5331A-KSZ |
| Converter Type | Audio ADC (sigma-delta) |
| 分解能 | 18 bits |
| Number of Channels | 2 (stereo, L+R) |
| Number of Inputs | 2 |
| Number of ADCs | 2 |
| Sampling Mode | Simultaneous sampling |
| Input Type | Single-ended |
| Data Interface | SPI (serial) |
| Configuration | S/H-ADC |
| Reference Type | Internal |
| パッケージ | 8-SOIC |
| 実装タイプ | Surface Mount |
| Packaging | Tray |
| ライフサイクル状態 | Obsolete (EOL) |
| ECCN | EAR99 |
CS5331A-KSZ ピン構成
| ピン 1 | AGND — Analog ground return |
| ピン 2 | VA — Analog +5 V supply |
| ピン 3 | AINL — Left channel analog input |
| ピン 4 | AINR — Right channel analog input |
| ピン 5 | DGND — Digital ground return |
| ピン 6 | VD — Digital +5 V supply |
| ピン 7 | MCLK — Master clock input |
| ピン 8 | SDOUT — Serial audio data output |
主な用途
CS5331A-KSZ の用途: 6 件s: Consumer Digital Audio Recording (DAT / CD-R / MD), Multimedia PC Audio Capture, USB Audio Streaming / Podcasting Interfaces, Set-Top Box / A/V Receiver Digital Audio Outputs, Automotive Head-Unit Auxiliary Input, Low-Cost Consumer Karaoke / Mixing Consoles.
Consumer Digital Audio Recording (DAT / CD-R / MD)
The CS5331A-KSZ's 18-bit resolution and two simultaneous-sampling sigma-delta channels make it well suited to consumer digital audio recording such as DAT, CD-R, and MD decks. Per the Cirrus Logic datasheet, the CS5330A/31A family integrates anti-alias filtering, sampling, and A/D conversion in a single 8-SOIC, so designers place the CS5331A-KSZ directly after the analog line-input stage and route its serial output to a digital audio processor. The internal reference and integrated decimation filter reduce external BOM by 4 to 6 passive components versus a discrete sigma-delta design, lowering total system cost. Two-channel simultaneous sampling avoids left/right phase mismatch that simple time-multiplexed ADCs exhibit, preserving stereo imaging fidelity required by DAT/MD recording standards.
おすすめ
Multimedia PC Audio Capture
The CS5331A-KSZ fits multimedia PC audio capture cards (line-in, microphone, auxiliary capture) where 18-bit resolution and 2-channel stere o are sufficient for voice and music recording. Its 8-SOIC footprint occupies less than 30 square millimeters of PCB area, allowing dense Sound Blaster-class and USB audio-dongle layouts. The internal reference eliminates the need for an external reference IC, and the SPI-compatible serial data interface streams 18-bit left/right samples directly to a DSP or USB audio-class controller. For multimedia designs targeting 44.1 kHz / 48 kHz sample rates, the CS5331A-KSZ offers an attractive BOM cost versus 24-bit alternatives, accepting a modest dynamic-range trade-off to hit consumer price points.
おすすめ
USB Audio Streaming / Podcasting Interfaces
USB audio streaming and podcasting interfaces benefit from the CS5331A-KSZ's compact 8-SOIC package and low BOM complexity. The internal decimation filter handles the sigma-delta-to-PCM conversion, freeing the USB audio-controller firmware to focus on UAC-1/UAC-2 protocol handling and sample-rate conversion. With 18-bit resolution the CS5331A-KSZ provides roughly 100 dB of theoretical dynamic range, adequate for consumer podcasting where speech intelligibility (not audiophile fidelity) is the priority. The single-supply 5 V operation matches common USB-powered designs, and the stereo simultaneous sampling preserves binaural cues captured by stereo microphones in interview-style recording.
おすすめ
Set-Top Box / A/V Receiver Digital Audio Outputs
The CS5331A-KSZ is used in set-top box and A/V receiver designs to digitize stereo analog line inputs (aux-in, TV audio return) before routing through the main DSP. Its 18-bit resolution comfortably quantizes line-level sources at consumer-grade SNR, and the simultaneous L+R sampling avoids lip-sync drift when the downstream DSP mixes the streams. The 8-SOIC surface-mount package supports automated PCB assembly, important for high-volume set-top and A/V receiver production. The single-ended input topology matches standard line-level interfaces without external differential amplifiers, simplifying the analog front end to a coupling capacitor and resistive divider.
おすすめ
Automotive Head-Unit Auxiliary Input
Industrial-temp rated CS5331A-KSZ variants (the K-prefix grade) operate from -40 C to +85 C, qualifying them for automotive head-unit auxiliary input and aftermarket infotainment applications. The 18-bit stereo ADC accepts line-level or slightly attenuated speaker-level signals after a coupling network and feeds a digital signal processor that handles volume, tone, and source mixing. The 8-SOIC footprint is automotive-assembly friendly, withstanding standard reflow profiles and conformal coating processes. The internal reference and decimation filter reduce the external component count, important for automotive cost-sensitive BOMs where every passive adds tooling and qualification expense.
おすすめ
Low-Cost Consumer Karaoke / Mixing Consoles
The CS5331A-KSZ supports low-cost consumer karaoke machines and small-format mixing consoles where two-channel 18-bit analog-to-digital conversion at 48 kHz suffices for vocal and instrument capture. Its small 8-SOIC package and serial SPI output simplify wiring to low-cost microcontrollers (such as 8051, Cortex-M0) that implement the karaoke DSP effects. The single 5 V analog supply standardizes power design with the rest of the karaoke PCB, and the simultaneous-sampling ADCs preserve stereo alignment between the two mic inputs - critical for dual-vocalist karaoke where identical-time capture of both singers' voices determines mix quality and intelligibility.
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-KSZ — 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 | CS5330A-KSZ | CS5331A-KS | CS5331A-DSZ | CS5331A-DSZR | CS5331A-KSZR |
|---|---|---|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Resolution | 18 bits | 18 bits | 18 bits | 18 bits | 18 bits | 18 bits |
| Channels | 2 (stereo) | 2 (stereo) | 2 (stereo) | 2 (stereo) | 2 (stereo) | 2 (stereo) |
| Sampling | Simultaneous | Simultaneous | Simultaneous | Simultaneous | Simultaneous | Simultaneous |
| Reference Type | Internal | Internal | Internal | Internal | Internal | Internal |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Commercial (0C to +70C) | Commercial (0C to +70C) | Industrial (-40C to +85C) |
| Packaging | Tray | Tray | Tray | Tray | Tape & Reel | Tape & Reel |
主な差別化要因
- Lower-cost same-family sibling with identical 8-SOIC footprint （vs CS5330A-KSZ)
- Industrial temperature grade at the same SOIC-8 footprint （vs CS5331A-KS (commercial temperature))
- All alternative variants share the identical 8-SOIC footprint （vs CS5331A-DSZ / CS5331A-KSZR / CS5331A-DSZR)
設計ノート
Use separate analog and digital ground planes joined at a single point near the CS5331A-KSZ AGND pin, and place one 10 uF tantalum plus one 0.1 uF ceramic decoupling capacitor within 5 mm of each of the VA and VD pins. The two ground domains prevent digital return currents from corrupting the analog reference and degrading achievable dynamic range. If the board is single-layer, route the AGND trace as a star to the CS5331A-KSZ and avoid sharing it with high-current digital return paths.
Feed the MCLK pin from a low-jitter source such as a crystal oscillator or a dedicated audio PLL; jitter on MCLK directly degrades the sigma-delta modulator's achievable dynamic range. Estimated: when MCLK jitter exceeds 50 ps RMS, expect 3 to 6 dB of dynamic-range loss at 1 kHz full-scale. Keep the MCLK trace short and away from switching regulators or other noisy digital signals to maintain SNR within datasheet-typical limits.
Do not place the CS5331A-KSZ near switching DC-DC converters, high-current digital buses, or sources of strong EMI without extensive shielding, because the single-ended analog inputs can pick up noise that the internal decimation filter may not fully reject. Verify the analog input is AC-coupled through a 0.1 uF to 1 uF capacitor (per datasheet recommendation) and DC-biased to mid-supply if single-ended operation is required - failure to bias the inputs corrupts the modulator's common-mode operating point.
コンプライアンス情報
Compliance values not present in the verified web data; set to unknown per data authenticity rules. CS5331A-KSZ is obsolete / EOL, so historical compliance status from the original 1997 product introduction is not extracted from current distributor data.
