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P0013-01

APPLICATIONS

DESCRIPTION

OPA698M

SGLS287A – MAY 2005 – REVISED MARCH 2006

UNITY-GAIN STABLE WIDEBAND VOLTAGE LIMITING AMPLIFIER

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High Linearity Near Limiting

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Fast Recovery from Overdrive: 1 ns

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Limiting Voltage Accuracy: ±15 mV

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-3-dB Bandwidth (G = +1): 450 MHz

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Slew Rate: 1100 V/ms

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±5-V and 5-V Supply Operation

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Unity Gain Version of the OPA699

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Fast Limiting ADC Input Buffers

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CCD Pixel Clock Stripping

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Video Sync Stripping

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HF Mixers

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IF Limiting Amplifiers

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AM Signal Generation

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Non-Linear Analog Signal Processing

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OPA688M Replacement

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 ±15 mV. The op amp operates linearly to within 30 mV

of the output limit voltages.

The combination of narrow nonlinear range and low limiting offset allows the limiting voltages to be set within

100 mV of the desired linear output range. A fast 1-ns 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.

Non-linear analog signal processing benefits from the ability of the OPA698 to sharply transition from linear

operation to output limiting. The quick recovery time supports high-speed applications.

The OPA698M is available in an industry standard pinout CDIP-8 package. For higher gain or transimpedance

applications requiring output limiting with fast recovery, consider the OPA699M.

ORDERING INFORMATION(1)

ORDERABLE

TOP-SIDE

TA

PACKAGE

PART NUMBER

MARKING

–55°C to 125°C

CDIP – JD

Tube

OPA698MJD

OPA698MJD

(1)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.