CS5126-KP - 16-Bit Stereo Audio ADC, 100 kHz | Cirrus Logic | DIP-28
部品番号: CS5126-KP ✓ 生産中CS5126-KP 概要
An audio ADC is a specialized analog-to-digital converter optimized for audio bandwidth and dynamic range rather than for general-purpose instrumentation. Within the signal-chain hierarchy, a converter of this type sits at the front end of a digital audio path: analog microphone or line-level signal -> audio ADC -> oversampling/delta-sigma digital filter -> digital audio stream. The CS5126 sits in the ADC stage, ahead of any DSP or DAC in the chain, and its job is to convert the analog world into a clocked digital representation without adding audible noise or distortion.
Because the part is specified for digital audio, its key characteristics are audio-centric: 16-bit resolution gives a theoretical dynamic range of 96 dB, the 100 kHz conversion rate supports professional 48 kHz, 96 kHz, and related audio sample rates with margin for oversampling filter requirements, and the stereo architecture allows simultaneous left/right capture in a single device. Supply operation from 4.5 V to 5.5 V allows the part to sit directly on legacy 5 V audio rails, and the DIP-28 through-hole package simplifies prototyping, laboratory instrumentation, and repair work on boards that were not designed for fine-pitch assembly.
Mechanically and electrically the CS5126-KP is a through-hole DIP-28 device, so it is assembled with conventional insertion rather than reflow. That makes it a natural choice for hand-built audio measurement equipment, educational and laboratory setups, converter research fixtures, and repair or modernization of older 5 V analog audio subsystems where surface-mount parts would be impractical.
Typical uses include stereo audio capture for broadcast and studio monitoring equipment, multichannel digital audio mixers built around legacy DSP cores, headphone and line-level measurement fixtures, and audio DSP front-end boards in industrial and instrument products. Companion parts in such designs are typically low-noise audio DACs and audio codec ICs, line-level input drivers, and the serial digital interface transceivers used to move the audio data bus between boards.
Design consideration: this is a legacy-technology part on a 5 V analog rail, so input buffering and grounding dominate the noise budget. Keep the analog inputs short, shield them from the digital output bus, and respect the manufacturer's recommended filter and decoupling network around the analog supply pins.
This page consolidates distributor pricing, verified package and supply information, drop-in same-family alternatives such as the CS5126-EP and CS5126-IP, and practical design guidance that is not collected together on typical distributor catalog pages.
ドロップイン代替品: CS5126-KP — 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。
CS5126-EP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
CS5126-IP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
CS5126-KP 最大定格＆電気的特性
| 機能 | Stereo audio analog-to-digital converter for digital audio |
| 分解能 | 16 bit |
| Number of Channels | 2 (stereo) |
| Maximum Sample Rate | 100 kHz |
| Supply Voltage Range | 4.5 V to 5.5 V |
| パッケージ | 28-DIP (through-hole) |
| 実装タイプ | Through-hole / DIP |
| Manufacturer | Cirrus Logic |
| Datasheet Length | 32 pages |
| RoHS ステータス | Compliant |
| Reset / Initialization | Requires reset at power-up to guarantee a consistent starting condition |
| Lead Time / Stock Status | Listed as in stock at LCSC and distributor stocked as of 2026-10-29 |
CS5126-KP 28-dip (through-hole) ピン配置ガイド
CS5126-KP (28-dip (through-hole) 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: CS5126-KP.
詳細は データシート をご参照ください。
主な用途
CS5126-KP の用途: 6 件s: Stereo Audio Capture Front End, Professional Audio Monitoring and Broadcast Equipment, Laboratory Audio Test and Measurement Instrumentation, Industrial Audio Control and Monitoring, Legacy Audio Subsystem Repair and Modernization, Digital Audio Interface and Codec Companion Boards.
Stereo Audio Capture Front End
The CS5126-KP is a natural first stage in any stereo analog-to-digital audio capture path because it converts two analog channels simultaneously at 16-bit resolution and up to 100 kHz. A typical implementation places the CS5126-KP downstream of a line-level input buffer and upstream of an audio DSP, feeding the converter's digital audio stream into the processor for mixing, level metering, or storage. At 48 kHz or 96 kHz operating rates the 100 kHz conversion capability leaves headroom for the anti-alias filtering that the audio standard expects ahead of the converter. The benefit over a general-purpose instrumentation ADC is that the device is optimized for the audio bandwidth and for direct digital-audio interconnection, so the external support network is simpler and the system clocking plan is more predictable. Because it is a 4.5 V to 5.5 V part, it drops straight onto legacy 5 V analog rails in existing mixer and monitoring equipment.
おすすめ
Professional Audio Monitoring and Broadcast Equipment
Broadcast consoles, studio monitors and meter bridges all need repeatable stereo capture for level metering and calibration. The CS5126-KP fits because its 16-bit conversion and 100 kHz rate cover the professional 48 kHz and 96 kHz formats, while the through-hole DIP-28 package is easy to hand-solder on a monitoring sub-board and straightforward to replace if a channel ever fails. In such a system the CS5126-KP is typically clocked from the same master clock domain as the DSP, with the reset line asserted during power-up because the manufacturer datasheet states the device must be reset to guarantee a consistent starting condition. That deterministic initialization matters in broadcast hardware where a partially initialized converter would produce audible channel offset or a mute event. The tradeoff is that the DIP-28 package occupies far more board area than a modern QFN audio converter, so a new compact design would typically choose a surface-mount alternative instead.
おすすめ
Laboratory Audio Test and Measurement Instrumentation
Laboratory analyzers and audio measurement fixtures favor the CS5126-KP because it is a genuine 16-bit stereo audio converter in a hand-insertable 28-DIP package, which makes prototype and rework cycles fast. A test instrument that measures amplifier THD, channel separation, or noise floor can feed a known analog level into the CS5126-KP and compare the resulting digital samples against a reference, giving a repeatable 96 dB-class theoretical quantization floor to work against. The 100 kHz conversion rate also allows oversampled measurement techniques commonly used for audio performance benchmarking. Because the instrument must resolve small signals, the analog input path should be kept short and away from the digital data bus, and the 5 V supply decoupling should follow the manufacturer's recommended layout. Compared with a laboratory-grade precision ADC, the CS5126-KP trades absolute accuracy for audio-optimized behaviour and much lower cost.
おすすめ
Industrial Audio Control and Monitoring
Industrial equipment that listens to its environment - condition monitoring, machine acoustic signatures, alarm annunciation, or acoustic event detection - often needs a stereo channel and a converter that will survive temperature swings. The CS5126-KP covers the standard commercial grade and can be paired with the CS5126-EP for wider ambient spans while keeping the identical 28-DIP footprint, so a single PCB can be built with either grade depending on the deployment. In such systems the CS5126-KP typically sits at the end of a shielded analog input board and feeds an embedded MCU or DSP that performs spectral analysis or event classification. The advantage of the through-hole package is mechanical robustness in vibration-prone industrial enclosures, where surface-mount solder joints can be a concern. The limitation is board area and the fact that a modern MCU with integrated audio converters would be smaller and cheaper if absolute audio fidelity is not critical to the application.
おすすめ
Legacy Audio Subsystem Repair and Modernization
The CS5126-KP is frequently encountered as the converter inside older 5 V analog audio subsystems in broadcast consoles, synthesizers, and laboratory gear, and its through-hole DIP-28 format makes it one of the more serviceable converter packages of its generation. Because the CS5126-EP and CS5126-IP share the same footprint and core specifications, a failed converter can be replaced without respinning the board or re-laying a land pattern. In a repair scenario the key steps are to confirm the reset pin is asserted at power-up as the datasheet initialization section requires, to verify the 4.5 V to 5.5 V supply range at the device, and to check that the analog input network has not drifted. The cost advantage over a complete board redesign is significant for equipment where the analog circuitry is still performing well and only the converter has failed.
おすすめ
Digital Audio Interface and Codec Companion Boards
The CS5126-KP works well as the ADC element of a two-board audio architecture, where an analog board carries the converter and a digital board carries the DSP and codec. Splitting the design this way isolates the sensitive analog section from processor switching noise and keeps the DIP-28 converter on a simple through-hole carrier board that can be replaced independently. The CS5126-KP's 100 kHz stereo capability pairs naturally with a modern audio DAC such as the WM8783 or AK4127 family on the output side, creating a matched 16-bit analog-to-digital and digital-to-analog path for high-fidelity playback. The tradeoff is that the digital interface between boards must be handled carefully - long ribbon cables carrying a high-rate serial audio clock are a common source of jitter and ground-noise problems - so the interconnect should be kept short or buffered. Within the board itself the analog supply decoupling and return current paths deserve the majority of the layout attention.
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: CS5126-KP — 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 | CS5126-EP | CS5126-IP |
|---|---|---|---|
| Package | 28-DIP (through-hole) | 28-DIP (through-hole) - same | 28-DIP (through-hole) - same |
| Brand | Cirrus Logic | Cirrus Logic - same | Cirrus Logic - same |
| Resolution | 16 bit | 16 bit | 16 bit |
| Channels | 2 (stereo) | 2 (stereo) | 2 (stereo) |
| Maximum Sample Rate | 100 kHz | 100 kHz | 100 kHz |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Temperature Grade | Standard commercial grade (-KP) | Extended temperature range for industrial applications | Industrial temperature grade |
| Function | 16-bit stereo A/D converter for digital audio | 16-bit stereo A/D converter for digital audio | 16-bit stereo A/D converter for digital audio |
主な差別化要因
- Only same-package, same-family drop-in path without a board respin （vs AK4137EQ)
- Audio-optimized 16-bit conversion at 100 kHz in a legacy 5 V rail part （vs AK4116VF)
- Same core specification across three temperature grades without layout change （vs CS5126-IP)
- Through-hole serviceability for repair and hand-built instruments （vs WM8783GED/V)
設計ノート
The CS5126-KP mixes analog inputs with a high-rate digital clock and data bus on the same 28-DIP footprint, so keep the analog input traces short and route them away from the digital outputs. Place the analog input network components directly at the converter pins, keep analog and digital return currents on separate paths to the device ground pins, and use a solid ground plane rather than a split plane if the board is multilayer. Estimated: with 100 kHz-class conversion and serial clocking in the megahertz range, the switching current harmonics are far above the audio band, so even a few centimetres of coupling between the analog input and the digital bus can degrade the measured noise floor.
The CS5126-KP operates from 4.5 V to 5.5 V, which is typical of legacy analog audio rails that are shared with noisy system loads. Decouple the analog supply pins locally with a combination of bulk ceramic capacitance and a high-frequency ceramic capacitor placed within a few millimetres of the device pins, and keep the switching supply physically separate from the analog rail routing. If the supply rail is shared with a switching converter, add an LC or ferrite isolation network ahead of the converter pins. Estimated: even a few millivolts of supply ripple coupled into the analog input appears directly as modulation of the converted audio, so the supply filtering budget is usually more valuable than extra external filtering at the input.
The manufacturer datasheet states that the CS5126 must be reset at power-up to guarantee a consistent starting condition. Designs that tie the reset line permanently inactive risk an undefined converter state at startup, producing channel offset, a mute event, or non-conforming samples in the first audio frames. Provide an RC reset network or drive reset from the system supervisor, and ensure the master clock is stable and present before the converter is released from reset. Because this part is a DIP-28 through-hole device, also confirm that the socket or PCB pads have adequate solder-joint reliability in vibration-prone or high-temperature industrial equipment.
Do not assume that a modern surface-mount stereo audio ADC can be substituted on the same board. The CS5126-KP is a through-hole DIP-28 device with a specific pin arrangement, and modern equivalents such as the AK41xx and WM87xx families use QFN or LQFP outlines with different pin functions, so a swap would require a new PCB or a carrier-adapter board. Plan the mechanical footprint around the DIP-28 row spacing from the start if a future conversion to surface mount is anticipated, and note that the large package consumes significantly more board area than its modern equivalents.
コンプライアンス情報
RoHS compliance is stated on the LCSC product listing for the CS5126-KP. No REACH, AEC-Q100, lead-free or halogen-free statements were present in the verified web data, so those fields remain unknown rather than assumed.
