OPA2683
- REDUCED BANDWIDTH CHANGE VERSUS GAIN
- 150MHz BANDWIDTH G = +2
- >80MHz BANDWIDTH TO GAIN > +10
- LOW DISTORTION: < –65dBc at 5MHz
- HIGH OUTPUT CURRENT: 110mA
- SINGLE-SUPPLY OPERATION: +5V to +12V
- DUAL-SUPPLY OPERATION: ±2.5V to ±6V
- LOW SUPPLY CURRENT: 1.9mA Total
- POWER SHUTDOWN VERSION: MSOP-10
- APPLICATIONS
- LOW POWER BROADCAST VIDEO DRIVER
- µPOWER ACTIVE FILTERS
- SHORT LOOP ADSL CO DRIVER
- MULTICHANNEL SUMMING AMPLIFIERS
- PROFESSIONAL CAMERAS
- DIFFERENTIAL ADC INPUT DRIVER
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The OPA2683 provides a new level of performance for dual, very low-power, wideband, current-feedback amplifiers. This CFBPLUS amplifier is among the first to use an internally closed-loop input buffer stage that significantly enhances performance over earlier low-power, current-feedback (CFB) amplifiers. This new architecture provides many of the advantages of a more ideal CFB amplifier while retaining the benefits of very low-power operation. The closed-loop input stage buffer gives a very low and linearized impedance path at the inverting input to sense the feedback error current. This improved inverting input impedance gives exceptional bandwidth retention to much higher gains and improved harmonic distortion over earlier solutions limited by inverting input linearity. Beyond simple high gain applications, the OPA2683 CFBPLUS amplifier can allow the gain setting element to be set with considerable freedom from amplifier bandwidth interaction. This flexibility allows frequency response peaking elements to be added, multiple input inverting summing circuits to have greater bandwidth, and low-power differential line drivers to meet the demanding requirements of DSL.
The output capability for the OPA2683 also sets a new mark in performance for very low-power current-feedback amplifiers. Delivering a full ±4Vpp swing on ±5V supplies, the OPA2683 also has the output current to support this swing into a 100
load. This minimal output headroom requirement is complemented by a similar 1.2V input stage headroom giving exceptional capability for single +5V operation.
The OPA2683’s low 1.9mA total supply current is precisely trimmed at +25°C. This trim, along with low shift over temperature and supply voltage, gives a very robust design over a wide range of operating conditions. Further system power reduction is possible using the shutdown feature of the MSOP-10 package.
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 | Very Low-Power, Dual, Current-Feedback Operational Amplifier datasheet (Rev. H) | 2009/7/23 | |||
| 電子書 | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | 2017/3/28 | |||
| 應用說明 | RLC Filter Design for ADC Interface Applications (Rev. A) | 2015/5/13 | ||||
| 使用指南 | DEM-OPA-SO-2A User's Guide (Rev. B) | 2010/4/30 | ||||
| 應用說明 | Wireline Data Transmission and Reception | 2010/1/27 | ||||
| 使用指南 | DEM-OPA-SOT-2A User's Guide (Rev. A) | 2006/5/25 | ||||
| 類比設計期刊 | Expanding the usability of current-feedback amplifiers | 2005/2/28 | ||||
| 類比設計期刊 | Active filters using current-feedback amplifiers | 2005/2/25 | ||||
| 應用說明 | Noise Analysis for High Speed Op Amps (Rev. A) | 2005/1/17 | ||||
| 應用說明 | Stabilizing Current-Feedback Op Amps While Optimizing Circuit Performance | 2004/4/28 | ||||
| 應用說明 | ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers | 2004/4/22 | ||||
| 應用說明 | Measuring Board Parasitics in High-Speed Analog Design | 2003/7/7 | ||||
| 應用說明 | Current Feedback Amplifiers: Review, Stability Analysis, and Applications | 2000/11/20 |
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)。
DEM-OPA-SO-2A — 適用於 SO-8 封裝的二路運算放大器評估模組
The DEM-OPA-SO-2A demonstration evaluation module helps designers evaluate the operation and performance of TI dual-channel, high-speed, wideband operational amplifiers. This unpopulated printed-circuit board (PCB) is compatible with products offered in the 8-lead SOIC (D) package.
For more (...)
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-00025 — 低功耗全差動可程式編輯增益放大器參考設計
Reference Design for a Low Power Fully Differential Programmable Gain Amplifier using the TI OPA2683 Low Power Dual Current Feedback Amplifier. This design guide reviews some of the design challenges necessary to create such a circuit. The design guide reviews the results and provides some (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DCN) | 8 | Ultra Librarian |
| VSSOP (DGS) | 10 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |