PCM1744U - 24-Bit 96kHz Stereo I2S DAC | Texas Instruments
部品番号: PCM1744U ✓ 生産中PCM1744U 概要
An audio DAC is a semiconductor that converts digital PCM audio samples into continuous analog voltage signals. The PCM1744U belongs to the digital-to-analog converter hierarchy within audio interface ICs, where it bridges a digital audio processor and an analog amplification or line-output stage. Its I2S interface transfers framed stereo audio data using separate clock, data, and word-selection signals.
Key features include 24-bit resolution, support for sampling rates up to 96 kHz, two audio output channels, and a 97 dB SNR rating. The 14-pin SOIC package supports conventional surface-mount PCB assembly. These specifications align with CD-quality and related digital audio paths where the source data resolution and required bandwidth fit within the converter's supported range.
The PCM1744U is designed for stereo audio systems that require a digital input and analog output without using the device as a general-purpose signal generator. Its 24-bit interface preserves a large dynamic range, while the 96 kHz sampling-rate ceiling supports common high-resolution audio formats. The 97 dB SNR specification provides a concise indication of the converter's signal quality relative to quantization noise and other internal noise sources.
Typical uses include consumer audio equipment, digital media systems, multichannel audio processors, powered speakers, sound cards, and embedded audio products. In these applications, the PCM1744U accepts I2S audio from a codec, DSP, or application processor and produces two analog outputs that can feed an op-amp buffer, line driver, headphone amplifier, or speaker amplifier stage.
PCB design should provide a stable low-noise supply and short analog output routing. Input and output capacitors, grounding, and the analog signal path must follow the layout guidance in the manufacturer datasheet. Because the verified snippets do not provide exact capacitor values, supply-current limits, analog output swing, or pin names, those implementation details should not be inferred from generic PCM1744-family designs.
This page consolidates the verified manufacturer specifications, distributor availability links, package information, replacement constraints, and application guidance for PCM1744U. It distinguishes confirmed facts from parameters that still require direct confirmation in the official datasheet, helping engineers evaluate the device without relying on unverified cross-reference claims.
ドロップイン代替品: PCM1744U — 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。
PCM1744U/2K
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PCM1744U 最大定格＆電気的特性
| Device Type | Stereo audio digital-to-analog converter (DAC) |
| Manufacturer | Texas Instruments |
| 分解能 | 24 bit |
| Maximum Sampling Rate | 96 kHz |
| Number of Channels | 2 channels |
| Signal-to-Noise Ratio | 97 dB |
| Digital Audio Interface | I2S |
| Series | SoundPlus |
| パッケージ | 14-pin SOIC (D) |
| ピン数 | 14 pins |
| 実装タイプ | Surface mount |
| 電源電圧 | 5 V |
| 動作温度 | -25 °C to +85 °C |
| Product Series | PCM1744 |
PCM1744U 14-pin soic (d) ピン配置ガイド
PCM1744U (14-pin soic (d) 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: PCM1744U.
詳細は データシート をご参照ください。
主な用途
PCM1744U の用途: 6 件s: High-Fidelity Stereo Audio Playback, Powered Speaker Signal Generation, Digital Sound Card, Digital Media Player, Multichannel Audio Processor, Professional Audio Monitoring.
High-Fidelity Stereo Audio Playback
The PCM1744U fits high-fidelity stereo playback because it accepts 24-bit I2S data and converts it through two DAC channels at sampling rates up to 96 kHz. Its 97 dB SNR specification gives the analog output stage a defined noise-performance baseline. In a media player or digital audio source, the converter can receive frames from an audio codec or DSP and provide left and right analog signals for op-amp buffering. The benefit is a dedicated audio conversion path with sufficient word length and bandwidth, although system noise also depends on the supply, clock source, output filters, and following amplifier.
おすすめ
Powered Speaker Signal Generation
The PCM1744U can generate the analog stereo signal used by a powered-speaker or compact speaker-amplifier system. Its two-channel architecture avoids duplicating the conversion function, while 24-bit data and 96 kHz sampling support common high-resolution source formats. Place the DAC output into a suitable analog gain stage rather than driving a speaker load directly. This arrangement separates digital-to-analog conversion from amplifier heat and output-current requirements, although the chosen amplifier must preserve the DAC's signal quality and operate within its documented voltage range.
おすすめ
Digital Sound Card
PCM1744U is applicable to a digital sound card that accepts I2S audio from a USB interface controller and produces two analog outputs. The converter's 24-bit resolution, 96 kHz maximum sampling rate, and 97 dB SNR align with a conventional hi-fi playback architecture. Short analog traces, careful ground partitioning, and stable supply decoupling are essential because these features reduce errors that cannot be corrected after conversion. The practical advantage is dedicated stereo DAC hardware, while the main system trade-off is the additional analog-output and clock-management design required.
おすすめ
Digital Media Player
In a digital media player, PCM1744U can convert an I2S audio stream into a stereo analog pair for a line-output or headphone-amplifier input. The 96 kHz sampling-rate ceiling supports conventional CD-rate and higher-rate sources, while the 24-bit interface minimizes quantization steps. The converter can be paired with an audio processor that handles file decoding and clock selection. Compared with integrating the DAC into a general mixed-signal system, a dedicated converter provides clearer signal partitioning, although PCB area and additional analog support circuitry increase slightly.
おすすめ
Multichannel Audio Processor
The PCM1744U can provide one stereo conversion channel within a multichannel audio processor that also handles synchronization, volume control, or additional codec functions. Its I2S interface simplifies connection to digital audio engines, while the two outputs support conventional left-right routing. For surround or multi-zone products, several converters may be required, making clock consistency and analog grounding especially important. The benefit is a standardized stereo conversion block with 24-bit data handling; the trade-off is that one PCM1744U covers two channels rather than the full channel count of the finished system.
おすすめ
Professional Audio Monitoring
PCM1744U may be used in monitoring and signal-conversion equipment where a digital audio source must become an analog stereo output. The 97 dB SNR rating provides a useful starting point for determining whether the converter is appropriate relative to the required noise floor, while 96 kHz sampling supports high-rate monitoring streams. The analog output should feed a low-noise buffer capable of handling the required bandwidth and output swing. Engineers should verify clock jitter, analog output specifications, and the system's permissible noise contribution in the official datasheet because these values are not present in the supplied snippets.
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: PCM1744U — 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 | PCM1744U/2K |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Package | 14-pin SOIC (D) | 14-pin SOIC (D) - same package family |
| Device Type | Stereo audio DAC | Stereo audio DAC |
| Resolution | 24 bit | 24 bit |
| Maximum Sampling Rate | 96 kHz | 96 kHz |
| Number of Channels | 2 channels | 2 channels |
| Digital Audio Interface | I2S | I2S |
主な差別化要因
- Dedicated stereo conversion with stated signal-to-noise performance （vs PCM1744U/2K)
- Confirmed manufacturer package and pin count （vs PCM1744U/2K)
- Directly documented I2S stereo application （vs PCM1744U/2K)
設計ノート
Route the two analog outputs as short, matched paths and keep them away from digital clock and switching-node traces. The supplied data confirms an I2S DAC but does not provide exact analog-output impedance, output-capacitor values, or pin names. Before finalizing the layout, use the official TI datasheet for the supported output-load network, reference configuration, and decoupling values rather than copying an unverified generic PCM1744 schematic.
Provide the documented 5 V supply with local high-frequency bypassing and a low-impedance return path. Because no verified quiescent-current or maximum-current values were supplied, the regulator should be selected with additional margin after checking the official datasheet and analog-output load. Include a deliberate startup sequence if the host audio codec, DSP, or amplifier requires controlled power sequencing; the PCM1744U reset and power-up behavior must be confirmed in that document.
Treat the I2S clock and data nets as digital signals that can inject noise into the analog output even when their logic levels are correct. Use short routing, a continuous reference plane, and termination only if supported by the source device and PCM1744U input specification. A low-jitter audio clock is important at 96 kHz. The supplied snippets do not state supported clock frequencies or jitter limits, so both must be verified before final clock-tree and impedance decisions are made.
Do not assume that every 24-bit, 96 kHz stereo DAC in a 14-SOIC package is pin-compatible. PCM1744U/2K is the only distinct same-family alternative supported by the supplied web results; packaging-code variants such as tape-and-reel or tube order codes are not counted as separate alternatives. Verify the exact ordering suffix, pin table, package drawing, electrical limits, lifecycle status, and availability directly in the Texas Instruments ordering information before approving a substitution.
コンプライアンス情報
The supplied verified web data does not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. AEC-Q100 is marked not_applicable because PCM1744U is presented as a general audio DAC rather than an automotive-qualified device.
