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.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | Very Low-Power, Dual, Current-Feedback Operational Amplifier 数据表 (Rev. H) | 2009-7-23 | |||
| 电子书 | The Signal e-book: 有关运算放大器设计主题的博客文章汇编 | PDF | HTML | 英语版 | PDF | HTML | 2018-1-31 | |
| 应用手册 | RLC Filter Design for ADC Interface Applications (Rev. A) | 2015-5-13 | ||||
| 用户指南 | DEM-OPA-SO-2A User's Guide (Rev. B) | 2010-4-30 | ||||
| 应用手册 | Wireline Data Transmission and Reception | 2010-1-27 | ||||
| 用户指南 | DEM-OPA-SOT-2A User's Guide (Rev. A) | 2006-5-25 | ||||
| 模拟设计期刊 | Expanding the usability of current-feedback amplifiers | 2005-2-28 | ||||
| 模拟设计期刊 | Active filters using current-feedback amplifiers | 2005-2-25 | ||||
| 应用手册 | Noise Analysis for High Speed Op Amps (Rev. A) | 2005-1-17 | ||||
| 应用手册 | Stabilizing Current-Feedback Op Amps While Optimizing Circuit Performance | 2004-4-28 | ||||
| 应用手册 | ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers | 2004-4-22 | ||||
| 应用手册 | Measuring Board Parasitics in High-Speed Analog Design | 2003-7-7 | ||||
| 应用手册 | Current Feedback Amplifiers: Review, Stability Analysis, and Applications | 2000-11-20 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
DEM-OPA-SO-2A — 采用 SO-8 封装的双路运算放大器评估模块
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.
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ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算列表，从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件，以稳定模数转换器 (ADC) 驱动器缓冲器电路。
除了可用作独立工具之外，该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。
TIDA-00025 — 低功耗全差动可编程增益放大器参考设计
使用 TI OPA2683 低功耗双通道电流反馈放大器的低功耗全差动可编程增益放大器的参考设计。此设计指南回顾了创建这类电路所需的一些设计中的挑战。设计指南回顾了结果并针对使用/设计低功耗 FDA PGA 提供了一些建议。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| SOT-23 (DCN) | 8 | Ultra Librarian |
| VSSOP (DGS) | 10 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |