OPA1622
- High-Fidelity Sound Quality
- Ultralow Noise: 2.8 nV/√Hz at 1 kHz
- Ultralow Total Harmonic Distortion + Noise:
–119 dB THD+N (142 mW/Ch into 32 Ω/Ch) - Wide Gain Bandwidth Product:
32 MHz (G = +1000) - High Slew Rate: 10 V/µs
- High Capacitive-Load Drive Capability: > 600 pF
- High Open-Loop Gain: 136 dB (600-Ω Load)
- Low Quiescent Current: 2.6 mA per Channel
- Low-Power Shutdown Mode With Reduced Pop
and Click Noise: 5 µA per Channel - Short-Circuit Protection
- Wide Supply Range: ±2 V to ±18 V
- Available in small VSON-10 µPackage
The OPA1622, dual, bipolar-input, SoundPlus™ audio operational amplifier achieves a very low, 2.8-nV/√Hz noise density with an ultralow THD+N of –119.2 dB at 1 kHz, while driving a 32-Ω load at 100-mW output power. The OPA1622 offers extremely-high ac PSRR and CMRR specifications that eliminate noise from power supplies, making the OPA1622 ideal for use in portable-audio applications. This device also has a high output-drive capability of +145 mA / –130 mA.
The OPA1622 operates over a very wide supply range of ±2 V to ±18 V, on only 2.6 mA of supply current per channel. The OPA1622 op amp is unity-gain stable and provides excellent dynamic behavior over a wide range of load conditions. The OPA1622 includes a shutdown mode, allowing the amplifiers to be switched from normal operation to a standby current that is typically less than 5 µA. This shutdown feature is specifically designed to eliminate click and pop noise when transitioning into or out of shutdown mode.
The OPA1622 features a unique internal layout for lowest crosstalk, and freedom from interactions between channels, even when overdriven or overloaded. This device is specified from –40°C to +125°C.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | OPA1622 SoundPlus™ High-Fidelity, Bipolar-Input, Audio Operational Amplifier datasheet (Rev. B) | PDF | HTML | 2016/5/3 | ||
| 應用說明 | How to Measure Total Harmonic Distortion of an Op-Amp and THD + N Fundamentals | PDF | HTML | 2023/11/9 | |||
| Application brief | Understanding Op Amp Noise in Audio Circuits | PDF | HTML | 2021/6/14 | |||
| 應用說明 | HiFi Audio Circuit Design | 2017/8/23 | ||||
| 電子書 | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | 2017/3/28 | |||
| 技術文章 | Pump it up quietly | PDF | HTML | 2016/2/19 | |||
| 類比設計期刊 | Stabilizing difference amplifiers for headphone applications | 2015/4/28 | ||||
| 類比設計期刊 | Reducing distortion from CMOS analog switches | 2015/1/29 | ||||
| 類比設計期刊 | Distortion and source impedance in JFET-input op amps | 2014/10/24 | ||||
| 電子書 | Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. D) | PDF | HTML | 2014/9/30 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
OPA1622EVM — OPA1622 音訊運算放大器評估模組
OPA1622EVM 是用於評估 OPA1622 音訊運算放大器 (op amp) 性能的硬體平台。在 EVM 中，OPA1622 的每個通道皆配置為差動放大器，可接收來自音訊分析器或音訊 DAC 的差動輸入訊號，並輸出單端訊號。OPA1622EVM 包含耳機輸出，使用者可使用自己選擇的耳機聆聽 OPA1622 的音質。OPA1622EVM 具備 80mArms 高線性輸出電流，可驅動 8Ω、16Ω、32Ω、300Ω、600Ω 及更高阻抗的耳機負載。
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。
除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。
TIDA-01341 — Hi-Fi 耳機放大器電源供應參考設計
TIDA-060031 — 可在高保真應用中實現優質音訊的精密 DAC 參考設計
DAC11001 音訊參考設計是一套獨特且全方位的音訊設計，搭載 DAC11001A 和 DAC11001B。DAC11001 是 20 位元、低雜訊、超高性能精準 R-2R 數位轉類比轉換器 (DAC)。ΔΣ 型調變器是音訊應用中最常見的 DAC。由於針對特定音訊需求的額外設計考量，因此音訊應用中通常不使用精密 R-2R 架構 DAC。此參考設計展示了精密 R-2R DAC 在高保真度音訊作為應用的情況下產生動態訊號的優點與限制。
TIPD177 — 適用於電流輸出音訊 DAC 的高保真耳機放大器參考設計
此 TI 精準驗證設計電路可將音訊 DAC 的差動電流輸出轉換為能夠驅動低阻抗耳機的單端電壓。此設計能夠滿足目前在手機與可攜式音訊播放器中普及的高傳真性能水準。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSON (DRC) | 10 | Ultra Librarian |