PGA2311UA Digital Audio Volume Controller Overview
The PGA2311UA from Texas Instruments is a high-precision digital volume controller engineered to replace traditional potentiometers in professional and consumer audio systems. By leveraging digital control technology, it delivers superior channel matching, low distortion, and reliable long-term performance??key attributes for preserving audio fidelity. ICメーカー offers this advanced solution as part of its comprehensive portfolio of audio signal processing semiconductors.
Technical Parameters of PGA2311UA
| パラメータ | 価値 | 単位 |
|---|---|---|
| 全高調波歪み＋ノイズ（THD+N） | 0.002 | % |
| 音量調整範囲 | -95.5 から +31.5 | dB |
| チャンネル・マッチング | ??0.1 | dB（最大） |
| 電源電圧範囲 | 5から18 | V |
| パッケージタイプ | 20ピンTSSOP（薄型シュリンク小型外形パッケージ） | |
動作特性
| 特徴 | 仕様 |
|---|---|
| 動作温度範囲 | -40度～85度 |
| コントロール・インターフェース | SPI（シリアル・ペリフェラル・インターフェース） |
| 標準的な消費電力 | 15mW |
| 周波数特性 | 20Hz～20kHz (?0.1dB) |
| 入力インピーダンス（差動） | 100k?? |
他のボリュームコントロール・ソリューションにない利点
The PGA2311UA outperforms both traditional and basic digital volume controls in critical areas. Unlike mechanical potentiometers, which suffer from wear, channel imbalance, and noise over time, its digital design ensures consistent ??0.1dB channel matching??eliminating the left/right volume discrepancies that degrade stereo imaging in music and film audio.
ベストセラー商品
Compared to entry-level digital volume controllers with higher distortion, its 0.002% THD+N ensures audio signals remain unaltered at any volume. This is a stark contrast to cheaper alternatives, which can introduce harshness or muffling, especially noticeable in quiet passages or high-resolution audio systems.
また、-95.5dBから+31.5dBのボリューム・レンジは、競合製品よりも高い柔軟性を提供します。また、+31.5dBのゲインは、プリアンプの追加を必要とせず、弱い入力信号（マイクやターンテーブルなど）にも対応し、システムの複雑さを軽減します。
注目商品
The 20-TSSOP package further distinguishes it, combining a compact footprint (saving PCB space) with 15mW low power consumption. This makes it suitable for both portable devices (e.g., battery-powered audio interfaces) and rack-mounted gear, where space and efficiency are priorities.
Typical Applications of PGA2311UA
The PGA2311UA excels in applications requiring precise, low-distortion volume control. Key use cases include:
お問い合わせ
- ハイエンド・オーディオ・プリアンプとステレオ・レシーバー
- Professional audio mixers and recording consoles
- ホームシアタープロセッサーとサラウンドサウンドシステム
- 車載用プレミアム・サウンド・システム
- オーディオ試験・測定機器
Texas Instruments?? Legacy in Audio Precision
As a Texas Instruments product, the PGA2311UA benefits from decades of analog audio engineering expertise. TI??s audio ICs are trusted by leading manufacturers for their strict adherence to performance standards, with each unit undergoing rigorous testing to ensure consistency across temperature ranges and voltage variations. This commitment to quality makes the PGA2311UA a reliable choice for audio systems where signal integrity is non-negotiable.
よくある質問（FAQ）
How does the PGA2311UA??s digital control improve upon analog potentiometers?
Digital control eliminates mechanical wear, ensuring long-term reliability. Unlike potentiometers, which often develop channel imbalance over time, the PGA2311UA maintains ??0.1dB matching, preserving stereo imaging and preventing uneven volume between left and right channels??critical for immersive audio experiences.
ボリューム・コントローラーにとって、なぜ0.002% THD+Nが重要なのでしょうか？
Low distortion ensures the audio signal remains true to the original source at any volume. Higher THD+N in volume controls can introduce unwanted artifacts, such as hissing or distortion, which are particularly noticeable in high-fidelity systems where subtle details (e.g., reverb tails, vocal nuances) define the listening experience.
20ピンTSSOPパッケージは、システム設計者にとってどのような利点がありますか？
The 20-TSSOP package??s compact size saves valuable PCB space, making it ideal for densely packed audio equipment. Its surface-mount design enables automated assembly, improving manufacturing efficiency, while its thermal performance ensures stable operation even in enclosed systems with limited airflow.
Can the PGA2311UA operate with both low and high voltage supplies?
Yes, its ??5V to ??18V supply range allows integration into diverse systems, from low-power portable devices (e.g., battery-powered DACs) to high-voltage professional equipment (e.g., studio mixers). This versatility eliminates the need for custom voltage regulation in many designs.
SPIインターフェースはどのようにシステム統合を強化するのか？
The SPI interface allows digital control via microprocessors, enabling remote operation in smart audio systems, motorized mixers, or home automation setups. This eliminates physical knobs, simplifying design in compact devices or equipment with limited panel space while supporting precise, programmable volume presets.