Product details

Architecture Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 5 Total supply voltage (Max) (+5V=5, +/-5V=10) 12 GBW (Typ) (MHz) 250 BW @ Acl (MHz) 450 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 1100 Vn at flatband (Typ) (nV/rtHz) 5.6 Vn at 1 kHz (Typ) (nV/rtHz) 11 Iq per channel (Typ) (mA) 15.5 Vos (offset voltage @ 25 C) (Max) (mV) 6 Rail-to-rail No Features Integrated Clamps Rating Catalog Operating temperature range (C) -40 to 85 CMRR (Typ) (dB) 61 Input bias current (Max) (pA) 10000000 Offset drift (Typ) (uV/C) 15 Output current (Typ) (mA) 120 2nd harmonic (dBc) 74 3rd harmonic (dBc) 87 @ MHz 5
Architecture Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 5 Total supply voltage (Max) (+5V=5, +/-5V=10) 12 GBW (Typ) (MHz) 250 BW @ Acl (MHz) 450 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 1100 Vn at flatband (Typ) (nV/rtHz) 5.6 Vn at 1 kHz (Typ) (nV/rtHz) 11 Iq per channel (Typ) (mA) 15.5 Vos (offset voltage @ 25 C) (Max) (mV) 6 Rail-to-rail No Features Integrated Clamps Rating Catalog Operating temperature range (C) -40 to 85 CMRR (Typ) (dB) 61 Input bias current (Max) (pA) 10000000 Offset drift (Typ) (uV/C) 15 Output current (Typ) (mA) 120 2nd harmonic (dBc) 74 3rd harmonic (dBc) 87 @ MHz 5
SOIC (D) 8 19 mm² 3.91 x 4.9
  • HIGH LINEARITY NEAR LIMITING
  • FAST RECOVERY FROM OVERDRIVE: 1ns
  • LIMITING VOLTAGE ACCURACY: ±10mV
  • –3dB BANDWIDTH (G = +1): 450MHz
  • GAIN BANDWIDTH PRODUCT: 250MHz
  • SLEW RATE: 1100V/µs
  • ±5V AND +5V SUPPLY OPERATION
  • HIGH-GAIN VERSION AVAILABLE: OPA699
  • APPLICATIONS
    • FAST LIMITING ANALOG-TO-DIGITAL CONVERTER (ADC) INPUT BUFFERS
    • CCD PIXEL CLOCK STRIPPING
    • VIDEO SYNC STRIPPING
    • HF MIXERS
    • IF LIMITING AMPLIFIERS
    • AM SIGNAL GENERATION
    • NONLINEAR ANALOG SIGNAL PROCESSING
    • OPA688 UPGRADE

All trademarks are the property of their respective owners.

  • HIGH LINEARITY NEAR LIMITING
  • FAST RECOVERY FROM OVERDRIVE: 1ns
  • LIMITING VOLTAGE ACCURACY: ±10mV
  • –3dB BANDWIDTH (G = +1): 450MHz
  • GAIN BANDWIDTH PRODUCT: 250MHz
  • SLEW RATE: 1100V/µs
  • ±5V AND +5V SUPPLY OPERATION
  • HIGH-GAIN VERSION AVAILABLE: OPA699
  • APPLICATIONS
    • FAST LIMITING ANALOG-TO-DIGITAL CONVERTER (ADC) INPUT BUFFERS
    • CCD PIXEL CLOCK STRIPPING
    • VIDEO SYNC STRIPPING
    • HF MIXERS
    • IF LIMITING AMPLIFIERS
    • AM SIGNAL GENERATION
    • NONLINEAR ANALOG SIGNAL PROCESSING
    • OPA688 UPGRADE

All trademarks are the property of their respective owners.

The OPA698 is a wideband, unity-gain stable voltage-feedback op amp that offers bipolar output voltage limiting. Two buffered limiting voltages take control of the output when it attempts to drive beyond these limits. This new output limiting architecture holds the limiter offset error to ±10mV. The op amp operates linearly to within 20mV of the output limit voltages.

The combination of a narrow nonlinear range and the low limiting offset allows the limiting voltages to be set within 100mV of the desired linear output range. A fast 1ns recovery from limiting ensures that overdrive signals will be transparent to the signal channel. Implementing the limiting function at the output, as opposed to the input, gives the specified limiting accuracy for any gain, and allows the OPA698 to be used in all standard op amp applications.

Nonlinear analog signal processing will benefit from the ability of the OPA698 to sharply transition from linear operation to output limiting. The quick recovery time supports high-speed applications.

The OPA698 is available in an industry standard pinout SO-8 package. For higher gain, or transimpedance applications requiring output limiting with fast recovery, consider the OPA699.

The OPA698 is a wideband, unity-gain stable voltage-feedback op amp that offers bipolar output voltage limiting. Two buffered limiting voltages take control of the output when it attempts to drive beyond these limits. This new output limiting architecture holds the limiter offset error to ±10mV. The op amp operates linearly to within 20mV of the output limit voltages.

The combination of a narrow nonlinear range and the low limiting offset allows the limiting voltages to be set within 100mV of the desired linear output range. A fast 1ns recovery from limiting ensures that overdrive signals will be transparent to the signal channel. Implementing the limiting function at the output, as opposed to the input, gives the specified limiting accuracy for any gain, and allows the OPA698 to be used in all standard op amp applications.

Nonlinear analog signal processing will benefit from the ability of the OPA698 to sharply transition from linear operation to output limiting. The quick recovery time supports high-speed applications.

The OPA698 is available in an industry standard pinout SO-8 package. For higher gain, or transimpedance applications requiring output limiting with fast recovery, consider the OPA699.

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Technical documentation

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Type Title Date
* Data sheet Unity Gain Stable, Wideband Voltage Limiting Amplifier datasheet (Rev. D) 30 Dec 2008
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note RLC Filter Design for ADC Interface Applications (Rev. A) 13 May 2015
Application note ADC Input Protection 04 Sep 2013
Application note Video Designs Using High-Speed Amplifiers (Rev. A) 03 Feb 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005
Application note ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers 22 Apr 2004
Application note Measuring Board Parasitics in High-Speed Analog Design 07 Jul 2003

Design & development

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

Evaluation board

DEM-OPA-SO-1A — Single op-amp evaluation module for SO-8 package

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.

Simulation model

OPA698 PSpice Model

SBOC045.ZIP (1 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
Calculation tool

ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
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Calculation tool

VOLT-DIVIDER-CALC — Voltage Divider Determines A Set of Resistors for a Voltage Divider

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.

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Ordering & quality

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Support & training

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Videos