OPA1642
- Superior Sound Quality
- True JFET Input Operational Amplifier
With Low Input Bias Current - Low Noise: 5.1 nV/√Hz at 1 kHz
- Ultralow Distortion: 0.00005% at 1 kHz
- High Slew Rate: 20 V/µs
- Unity Gain Stable
- No Phase Reversal
- Low Quiescent Current:
1.8 mA per Channel - Rail-to-rail Output
- Wide Supply Range: ±2.25 V to ±18 V
- Single, Dual, and Quad Versions Available
The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications.
The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Features include 5.1-nV/√Hz noise, low THD+N (0.00005%), a low input bias current of 2 pA, and low quiescent current of 1.8 mA per channel.
These devices operate over a very wide supply voltage range of ±2.25 V to ±18 V. The OPA1641, OPA1642, and OPA1644 series of operational amplifiers are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions.
The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded.
The OPA1641, OPA1642, and OPA1644 are specified from –40°C to +85°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 | OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers datasheet (Rev. D) | PDF | HTML | 2016/4/4 | ||
| Application brief | MUX-Friendly, Precision Operational Amplifiers (Rev. C) | PDF | HTML | 2022/2/8 | |||
| Application brief | Understanding Op Amp Noise in Audio Circuits | PDF | HTML | 2021/6/14 | |||
| 應用說明 | Phantom Power with Operational Amplifiers (Rev. A) | 2018/11/9 | ||||
| 電子書 | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | 2017/3/28 | |||
| 類比設計期刊 | Analog Applications Journal 4Q 2014 | 2014/10/24 | ||||
| 類比設計期刊 | Distortion and source impedance in JFET-input op amps | 2014/10/24 |
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)。
AMP-PDK-EVM — 放大器性能開發套件評估模組
放大器性能開發套件 (PDK) 是一款評估模組 (EVM) 套件，可測試通用運算放大器 (op amp) 參數，並與大多數運算放大器和比較器相容。EVM 套件提供主板和多個插槽式子卡選項，可滿足封裝需求，使工程師能夠快速評估和驗證裝置性能。
AMP-PDK-EVM 套件支援五種最熱門的業界標準封裝，包括：
- D (SOIC-8 和 SOIC-14)
- PW (TSSOP-14)
- DGK (VSSOP-8)
- DBV (SOT23-5 和 SOT23-6)
- DCK (SC70-5 和 SC70-6)
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。
TIPD186 — 適用於吉他放大器的音調堆疊參考設計
這款分離式電源供電的高性能吉他音電路可控制電子吉他訊號的低音、中音及高音頻率，同時能以最小失真和雜訊提供增益。緩衝輸入和輸出可維持系統行為，不受來源和負載阻抗影響，而電路前端的射頻 (RF) 濾波器則可讓音訊頻段外的雜訊衰減。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| VSSOP (DGK) | 8 | Ultra Librarian |