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Product details

Parameters

Architecture Current FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 4 Total supply voltage (Max) (+5V=5, +/-5V=10) 12 GBW (Typ) (MHz) 280 BW @ Acl (MHz) 280 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 2100 Vn at flatband (Typ) (nV/rtHz) 1.7 Vn at 1 kHz (Typ) (nV/rtHz) 1.7 Iq per channel (Typ) (mA) 5.1 Vos (offset voltage @ 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) (uV/C) 20 Output current (Typ) (mA) 190 2nd harmonic (dBc) 70 3rd harmonic (dBc) 74 @ MHz 5 open-in-new Find other High-speed op amps (GBW>=50MHz)

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 open-in-new Find other High-speed op amps (GBW>=50MHz)

Features

  • 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.

open-in-new Find other High-speed op amps (GBW>=50MHz)

Description

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.

open-in-new Find other High-speed op amps (GBW>=50MHz)
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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 20
Type Title Date
* Datasheet Wideband, Current Feedback Operational Amplifier With Disable datasheet (Rev. D) Jul. 02, 2008
Technical articles How to reduce distortion in high-voltage, high-frequency signal generation for AWGs Oct. 30, 2018
Technical articles What are the advantages of using JFET-input amplifiers in high-speed applications? Jun. 18, 2018
Technical articles Unique active mux capability combines buffer and switch into one solution Oct. 10, 2017
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Technical articles How to minimize filter loss when you drive an ADC Oct. 20, 2016
Application notes RLC Filter Design for ADC Interface Applications (Rev. A) May 13, 2015
User guides DEM-OPA-SO-1A User's Guide (Rev. B) Apr. 12, 2012
User guides DEM-OPA-SOT-1A User's Guide (Rev. B) Apr. 12, 2012
Application notes A Numerical Solution to an Analog Problem Apr. 25, 2010
Application notes Wireline Data Transmission and Reception Jan. 27, 2010
User guides DEM-OPA-SOT-1A User's Guide (Rev. A) Mar. 22, 2006
User guides DEM-OPA-SO-1A User's Guide (Rev. A) Mar. 16, 2006
Application notes Expanding the usability of current-feedback amplifiers Feb. 28, 2005
Application notes Active filters using current-feedback amplifiers Feb. 25, 2005
Application notes Noise Analysis for High Speed Op Amps (Rev. A) Jan. 17, 2005
Application notes Stabilizing Current-Feedback Op Amps While Optimizing Circuit Performance Apr. 28, 2004
Application notes ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers Apr. 22, 2004
Application notes Measuring Board Parasitics in High-Speed Analog Design Jul. 07, 2003
Application notes Current Feedback Amplifiers: Review, Stability Analysis, and Applications Nov. 20, 2000

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
5
Description

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.

EVALUATION BOARDS Download
document-generic User guide
5
Description

The DEM-OPA-SOT-1A is a demonstration fixture that 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 SOT(DBV) package.

EVALUATION BOARDS Download
49
Description

The THS3111 EVM User's Guide is included within the Datasheet.

The THS3111 EVM is a turnkey module that allows you to evaluate the low-noise, high-voltage, current-feedback amplifier used in high performance applications. This module provides well-regulated ac performance characteristics and allows (...)

Features

THS3111 evaluation module features:

  • Low Noise
  • High Output Current Drive: 260 mA
  • High Slew Rate: 1300 Vµs
  • Wide Bandwidth: 90 MHz
  • Wide Supply Range: ±5 V to ±15 V
EVALUATION BOARDS Download
49
Description

The THS3120 EVM User's Guide is included within the Datasheet.

The THS3120 EVM is a turnkey module that allows you to evaluate the low-noise, high-voltage, high output current drive, current-feedback amplifier designed to operate over a wide supply range for high performance applications.  The (...)

Features

Feature for the THS3120 EVM include:

  • Low Noise
  • High Output Current Drive: 475 mA
  • High Slew Rate: 1700V/µs
  • Wide Bandwidth: 120 MHz
  • Wide Supply Range: ±5 V to  ±15 V
  • Power-Down Feature
EVALUATION BOARDS Download
49
Description

The THS3121EVM User's Guide is included within the Datasheet.

The THS3121 EVM is a turnkey module that allows you to evaluate the low-noise, high-voltage, high output current drive, current-feedback amplifier designed to operate over a wide supply range for high performance applications.

Applications (...)

Features

Feature for the THS3121 EVM include:

  • Low Noise
  • High Output Current Drive: 475 mA
  • High Slew Rate: 1700V/µs
  • Wide Bandwidth: 120 MHz
  • Wide Supply Range: ±5 V to  ±15 V
  • Useful example of functional PCB board layout

Design tools & simulation

SIMULATION MODELS Download
SBOC240B.TSC (103 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM151B.ZIP (37 KB) - PSpice Model
SIMULATION MODELS Download
SBOM303A.ZIP (6 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)
CALCULATION TOOLS Download
Voltage Divider Determines A Set of Resistors for a Voltage Divider
VOLT-DIVIDER-CALC 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. This calculator can also be used to design non-inverting attentuation circuits.

(...)

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
SOT-23 (DBV) 6 View options

Ordering & quality

Support & training

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