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放大器
運算放大器 (op amps)
高速運算放大器 (GBW ≥ 50 MHz)

OPA691

現行

具有停用功能的寬頻電流回饋運算放大器

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產品規格表

OPA691

現行
產品規格表 立即訂購

產品詳細資料

Architecture Current FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 280 BW at Acl (MHz) 280 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 2100 Vn at flatband (typ) (nV√Hz) 1.7 Vn at 1 kHz (typ) (nV√Hz) 1.7 Iq per channel (typ) (mA) 5.1 Vos (offset voltage at 25°C) (max) (mV) 2.5 Rail-to-rail No Features Shutdown Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 56 Input bias current (max) (pA) 35000000 Offset drift (typ) (µV/°C) 20 Iout (typ) (mA) 190 2nd harmonic (dBc) 70 3rd harmonic (dBc) 74 Frequency of harmonic distortion measurement (MHz) 5
Architecture Current FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 280 BW at Acl (MHz) 280 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 2100 Vn at flatband (typ) (nV√Hz) 1.7 Vn at 1 kHz (typ) (nV√Hz) 1.7 Iq per channel (typ) (mA) 5.1 Vos (offset voltage at 25°C) (max) (mV) 2.5 Rail-to-rail No Features Shutdown Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 56 Input bias current (max) (pA) 35000000 Offset drift (typ) (µV/°C) 20 Iout (typ) (mA) 190 2nd harmonic (dBc) 70 3rd harmonic (dBc) 74 Frequency of harmonic distortion measurement (MHz) 5
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • FLEXIBLE SUPPLY RANGE:
        +5V to +12V Single-Supply
        ±2.5V to ±6V Dual-Supply
  • UNITY-GAIN STABLE: 280MHz (G =1)
  • HIGH OUTPUT CURRENT: 190mA
  • OUTPUT VOLTAGE SWING: ±4.0V
  • HIGH SLEW RATE: 2100V/µs
  • LOW dG/d: 0.07%/0.02°
  • LOW SUPPLY CURRENT: 5.1mA
  • LOW DISABLED CURRENT: 150µA
  • WIDEBAND +5V OPERATION: 190MHz (G = +2)
  • APPLICATIONS
    • xDSL LINE DRIVER
    • BROADBAND VIDEO BUFFERS
    • HIGH-SPEED IMAGING CHANNELS
    • PORTABLE INSTRUMENTS
    • ADC BUFFERS
    • ACTIVE FILTERS
    • WIDEBAND INVERTING SUMMING
    • HIGH SFDR IF AMPLIFIER

All trademarks are the property of their respective owners.
  • FLEXIBLE SUPPLY RANGE:
        +5V to +12V Single-Supply
        ±2.5V to ±6V Dual-Supply
  • UNITY-GAIN STABLE: 280MHz (G =1)
  • HIGH OUTPUT CURRENT: 190mA
  • OUTPUT VOLTAGE SWING: ±4.0V
  • HIGH SLEW RATE: 2100V/µs
  • LOW dG/d: 0.07%/0.02°
  • LOW SUPPLY CURRENT: 5.1mA
  • LOW DISABLED CURRENT: 150µA
  • WIDEBAND +5V OPERATION: 190MHz (G = +2)
  • APPLICATIONS
    • xDSL LINE DRIVER
    • BROADBAND VIDEO BUFFERS
    • HIGH-SPEED IMAGING CHANNELS
    • PORTABLE INSTRUMENTS
    • ADC BUFFERS
    • ACTIVE FILTERS
    • WIDEBAND INVERTING SUMMING
    • HIGH SFDR IF AMPLIFIER

All trademarks are the property of their respective owners.

The OPA691 sets a new level of performance for broadband current feedback op amps. Operating on a very low 5.1mA supply current, the OPA691 offers a slew rate and output power normally associated with a much higher supply current. A new output stage architecture delivers a high output current with minimal voltage headroom and crossover distortion. This gives exceptional single-supply operation. Using a single +5V supply, the OPA691 can deliver a 1V to 4V output swing with over 150mA drive current and 190MHz bandwidth. This combination of features makes the OPA691 an ideal RGB line driver or single-supply Analog-to-Digital Converter (ADC) input driver.

The OPA691’s low 5.1mA supply current is precisely trimmed at 25°C. This trim, along with low drift over-temperature, ensures lower maximum supply current than competing products. System power may be further reduced by using the optional disable control pin. Leaving this disable pin open, or holding it HIGH, gives normal operation. If pulled LOW, the OPA691 supply current drops to less than 150µA while the output goes into a high impedance state. This feature may be used for power savings.

The OPA691 sets a new level of performance for broadband current feedback op amps. Operating on a very low 5.1mA supply current, the OPA691 offers a slew rate and output power normally associated with a much higher supply current. A new output stage architecture delivers a high output current with minimal voltage headroom and crossover distortion. This gives exceptional single-supply operation. Using a single +5V supply, the OPA691 can deliver a 1V to 4V output swing with over 150mA drive current and 190MHz bandwidth. This combination of features makes the OPA691 an ideal RGB line driver or single-supply Analog-to-Digital Converter (ADC) input driver.

The OPA691’s low 5.1mA supply current is precisely trimmed at 25°C. This trim, along with low drift over-temperature, ensures lower maximum supply current than competing products. System power may be further reduced by using the optional disable control pin. Leaving this disable pin open, or holding it HIGH, gives normal operation. If pulled LOW, the OPA691 supply current drops to less than 150µA while the output goes into a high impedance state. This feature may be used for power savings.
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技術文件

star =TI 所選的此產品重要文件
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重要文件 類型 標題 格式選項 日期
* Data sheet Wideband, Current Feedback Operational Amplifier With Disable datasheet (Rev. D) 2008年 7月 2日
Technical article 3 common questions when designing with high-speed amplifiers PDF | HTML 2020年 7月 17日
E-book The Signal e-book: A compendium of blog posts on op amp design topics 2017年 3月 28日
Application note RLC Filter Design for ADC Interface Applications (Rev. A) 2015年 5月 13日
User guide DEM-OPA-SO-1A User's Guide (Rev. B) 2012年 4月 12日
User guide DEM-OPA-SOT-1A User's Guide (Rev. B) 2012年 4月 12日
Application note A Numerical Solution to an Analog Problem 2010年 4月 25日
Application note Wireline Data Transmission and Reception 2010年 1月 27日
Analog Design Journal Expanding the usability of current-feedback amplifiers 2005年 2月 28日
Analog Design Journal Active filters using current-feedback amplifiers 2005年 2月 25日
Application note Noise Analysis for High Speed Op Amps (Rev. A) 2005年 1月 17日
Application note Stabilizing Current-Feedback Op Amps While Optimizing Circuit Performance 2004年 4月 28日
Application note ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers 2004年 4月 22日
Application note Measuring Board Parasitics in High-Speed Analog Design 2003年 7月 7日
Application note Current Feedback Amplifiers: Review, Stability Analysis, and Applications 2000年 11月 20日

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)。

開發板

DEM-OPA-SO-1A — 適用於 SO-8 封裝的單路運算放大器評估模組

The DEM-OPA-SO-1A demonstration fixture helps designers evaluate the operation and performance of TI's High Speed, Wide Bandwidth Operational Amplifiers. This unpopulated PC board is compatible with products offered in the 8-lead SOIC (D) package.

使用指南: PDF
TI.com 無法提供
開發板

DEM-OPA-SOT-1A — 適用於 SOT-23 5 針腳和 6 針腳封裝的單路運算放大器評估模組

DEM-OPA-SOT-1A 是一種展示電路板，用於評估高速、寬頻運算放大器的運作和性能。此未組裝的 PC 電路板與採用小型電晶體 (SOT) DBV 封裝的產品相容。

使用指南: PDF
TI.com 無法提供
模擬型號

OPA691 PSpice Model (Rev. B)

SBOM151B.ZIP (37 KB) - PSpice Model
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模擬型號

OPA691 TINA-TI Reference Design (Rev. B)

SBOC240B.TSC (103 KB) - TINA-TI Reference Design
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模擬型號

OPA691 TINA-TI Spice Model (Rev. A)

SBOM303A.ZIP (6 KB) - TINA-TI Spice Model
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計算工具

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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計算工具

VOLT-DIVIDER-CALC — Voltage divider calculation tool

The voltage divider calculation tool (VOLT-DIVIDER-CALC) quickly determines a set of resistors for a voltage divider. This KnowledgeBase JavaScript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. VOLT-DIVIDER-CALC can also be used to (...)
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
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模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
使用指南: PDF
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 6 Ultra Librarian
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