PCM1760U - 20-Bit Dual Audio ADC | Texas Instruments
部品番号: PCM1760U ✗ 生産終了PCM1760U 概要
An audio ADC is a data-acquisition IC that samples incoming analog waveforms and converts their voltage amplitudes into high-resolution digital codes. The PCM1760U belongs to the broader ADC category, the ADC/DAC interface hierarchy, and ultimately the semiconductor and signal-conversion market. It is especially relevant when a design needs simultaneous conversion of two analog audio channels with high dynamic performance and manageable digital-filter implementation.
Key characteristics include 20-bit resolution, two analog inputs, sigma-delta conversion, and a maximum sampling rate of 48 kHz. The manufacturer describes typical THD+N of -92 dB and a maximum THD+N of -90 dB. Its enhanced noise-shaping architecture reduces quantization noise within the audio band, while the integrated decimation filter prepares the converted stream for downstream digital processing.
The PCM1760U integrates both the analog-to-digital modulator and the decimation filtering stage rather than requiring a separate external decimation filter for a conventional implementation. That integration can reduce board complexity and simplify clocking, data routing, and software configuration. The converter architecture remains specifically optimized for audio-rate signals, making it different from general-purpose high-speed ADCs intended for communications, instrumentation, or industrial waveform capture.
Typical applications include professional digital audio equipment, multichannel recording interfaces, studio monitor controllers, digital mixing consoles, broadcast consoles, and consumer audio products requiring two-channel conversion. It is also suitable for USB or networked audio subsystems when the downstream interface accepts the PCM1760U's audio-rate serial data and clocking arrangement.
Design the clock and digital interface carefully because converter performance depends on clean references, appropriate analog input conditioning, and a stable master clock. Use the manufacturer datasheet's recommended input and output-capacitor configuration, keep analog traces short, and provide return paths that avoid digital switching currents. Confirm interface voltage levels and data-format requirements against the exact system clock architecture.
This product summary combines the converter's stated resolution, channel count, sampling rate, distortion performance, packaging, architecture, and application guidance with practical design notes. It also distinguishes the U package from package or ordering variants and provides verified drop-in alternatives with explicit engineering differences.
ドロップイン代替品: PCM1760U — 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: PCM1760U （同一形状・フットプリント） — 相違点: Package.
PCM1760U-L
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PCM1760P
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →PCM1760U/1K
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PCM1760U 最大定格＆電気的特性
| Converter Type | Multibit enhanced noise-shaping A/D conversion system |
| 分解能 | 20 bit |
| Number of Analog Inputs | 2 inputs |
| Conversion Architecture | Sigma-delta |
| Maximum Sampling Rate | 48 kHz |
| THD+N | -92 dB typical |
| Maximum THD+N | -90 dB maximum |
| Modulator | Dual 20-bit monolithic modulator |
| Digital Filter | Monolithic decimation digital filter DF1760 |
| パッケージ | 28-pin SOIC |
| 実装タイプ | Surface mount |
| Number of Terminals | 28 terminals |
| Analog Input Channels | 2 channels |
| Digital Output Resolution | 20 bit |
PCM1760U 28-pin soic ピン配置ガイド
PCM1760U (28-pin soic 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: PCM1760U.
詳細は データシート をご参照ください。
主な用途
PCM1760U の用途: 6 件s: Professional Stereo Recording Interface, Studio Monitor Control System, Digital Mixing Console, Broadcast Audio Acquisition, USB Audio Interface, High-Precision Analog Audio Capture.
Professional Stereo Recording Interface
The PCM1760U fits a stereo recording front end because it converts two analog channels with 20-bit resolution at sampling rates up to 48 kHz. Its typical THD+N of -92 dB provides low-distortion capture for line-level studio signals. The integrated DF1760 decimation filter also reduces the filtering burden before serial audio data reaches a USB, network, or DSP interface. Engineers should condition each input for the intended source level, preserve balanced-signal grounding, and use a low-jitter master clock. The 28-SOIC package also makes the converter practical for compact multichannel boards where routing two inputs through separate converters would consume additional area.
おすすめ
Studio Monitor Control System
A studio monitor controller can use the PCM1760U to digitize left and right monitoring paths before applying volume, routing, or speaker-management processing. The dual 20-bit architecture is appropriate for a 48 kHz audio-rate control path, while the -92 dB typical THD+N helps preserve low-level monitor information. Place the converter behind the input gain and protection stages, and separate analog input routing from digital processor traces to reduce crosstalk. A stable system clock is essential because jitter can affect an otherwise accurate conversion chain even when the ADC's intrinsic distortion is low.
おすすめ
Digital Mixing Console
The PCM1760U can serve as a local stereo conversion channel in a digital mixing console that mixes channels in a downstream processor. Twenty-bit resolution and integrated noise shaping are useful when preserving low-level source material before gain staging and mixing. The converter's 48 kHz maximum rate supports conventional CD-rate audio workflows, and its two inputs align naturally with stereo channel pairs. Designers should maintain consistent clock domains across every converter and the console processor, terminate serial data correctly, and follow the manufacturer recommendations for analog supply filtering and digital-output layout.
おすすめ
Broadcast Audio Acquisition
Broadcast equipment requiring two-channel acquisition at up to 48 kHz can use the PCM1760U for monitoring, auxiliary, or production-sound inputs. Its integrated sigma-delta modulator and decimation filter provide a compact conversion path without requiring a separate stereo decimation stage. The 20-bit code depth offers adequate headroom for professional audio gain structures, while the specified -90 dB maximum THD+N supports low-distortion capture. For deployed broadcast hardware, confirm operating-temperature limits, supply tolerances, clock jitter tolerance, and long-term supply availability against the applicable production requirements.
おすすめ
USB Audio Interface
The PCM1760U is appropriate for a two-input USB audio interface targeting 44.1 or 48 kHz operation. It performs the stereo conversion while the downstream interface controller handles USB transport and packet formatting. The integrated decimation filter simplifies the audio-rate conversion stage, although the designer must still provide a stable master clock, suitable analog input gain, and filtering that meets the interface's output bandwidth. Keep the USB and digital-audio sections separated from the converter's analog inputs, and verify data timing against the selected USB audio controller.
おすすめ
High-Precision Analog Audio Capture
The PCM1760U can capture low-level analog audio in equipment where two channels and 20-bit resolution are sufficient but the application does not require a very high sample rate. Its enhanced noise-shaping architecture and integrated decimation filter are tailored to the audio band, while typical THD+N of -92 dB supports demanding capture paths. Good performance depends on low-noise input amplification, balanced grounding, and clean converter supplies. Use short analog paths, place decoupling capacitors at the appropriate supply pins, and avoid routing switching-regulator and digital-clock currents beneath the audio input network.
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: PCM1760U — 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 | PCM1760U-L | PCM1760P | PCM1760U/1K |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC |
| Resolution | 20 bit | 20 bit | 20 bit | 20 bit |
| Number of Analog Inputs | 2 inputs | 2 inputs | 2 inputs | 2 inputs |
| Conversion Architecture | Sigma-delta | Sigma-delta | Sigma-delta | Sigma-delta |
| Maximum Sampling Rate | 48 kHz | 48 kHz | 48 kHz | 48 kHz |
| Digital Filter | Integrated DF1760 decimation filter | Integrated decimation filter | Integrated DF1760 decimation filter | Integrated DF1760 decimation filter |
主な差別化要因
- Two-channel 20-bit conversion in a single converter （vs PCM1760U-L)
- Integrated multichannel decimation stage （vs PCM1760P)
- Low-distortion stereo acquisition （vs PCM1760U/1K)
設計ノート
Route the PCM1760U analog inputs as short, impedance-controlled traces away from clock, serial-data, and switching-supply nodes. Use a continuous ground reference beneath the analog section and provide a clear return path for input currents. If the analog source is not close to the converter, include suitable line-driver or differential-input conditioning rather than extending long unbalanced traces across the board.
Follow the manufacturer datasheet for supply-voltage tolerance, analog and digital supply connections, and decoupling-component selection. Place the specified bypass capacitors close to their associated pins with short ground returns. Confirm that the converter's clock and digital interface levels are compatible with the downstream device, especially when the audio processor operates from a separate supply domain.
Treat the serial audio clock and data lines as timing-sensitive interconnects. Use short routes, continuous reference planes, and terminations only where required by the exact interface specification. Verify setup and hold timing under the operating clock and grounding arrangement of the assembled board, since the PCM1760U's low distortion performance does not compensate for timing errors introduced by the digital interface.
Do not approve PCM1760U-L, PCM1760P, or PCM1760U/1K solely because they appear in the same family. Compare the ordering attributes, package drawing, pin descriptions, supply limits, clocking, reset requirements, and digital format. A suffix can change temperature grade, packing, or lead configuration even when the conversion architecture remains the same.
コンプライアンス情報
The device is an audio ADC rather than an automotive-qualified component. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation from the current manufacturer product or ordering documentation.