OPA698 Datasheet: Voltage Limiting Amplifier





OPA698 Voltage Limiting Amplifier Datasheet

Part Number OPA698
Description Voltage Limiting Amplifier
Manufacture etcTI
Total Page 30 Pages
PDF Download Download OPA698 Datasheet PDF

Features: OPA698 OPA698 www.ti.com SBOS258D – NOVEMBER 2002 – REVISED DECEMBER 2008 Unity-Gain Stable, Wideband Voltage Li miting Amplifier FEATURES q HIGH LINEA RITY NEAR LIMITING q FAST RECOVERY FROM OVERDRIVE: 1ns q LIMITING VOLTAGE ACCU RACY: ±10mV q –3dB BANDWIDTH (G = +1 ): 450MHz q GAIN BANDWIDTH PRODUCT: 250 MHz q SLEW RATE: 1100V/µs q ±5V AND + 5V SUPPLY OPERATION q HIGH-GAIN VERSION AVAILABLE: OPA699 DESCRIPTION The OPA6 98 is a wideband, unity-gain stable vol tagefeedback op amp that offers bipolar output voltage limiting. Two buffered limiting voltages take control of the o utput when it attempts to drive beyond these limits. This new output limiting architecture holds the limiter offset e rror to ±10mV. The op amp operates lin early to within 20mV of the output limi t voltages. The combination of a narrow nonlinear range and the low limiting o ffset allows the limiting voltages to b e set within 100mV of the desired linea r output range. A fast 1ns recovery from limiting ensures that overdrive .

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OPA698
OPA698
www.ti.com
SBOS258D – NOVEMBER 2002 – REVISED DECEMBER 2008
Unity-Gain Stable, Wideband
Voltage Limiting Amplifier
FEATURES
q HIGH LINEARITY NEAR LIMITING
q FAST RECOVERY FROM OVERDRIVE: 1ns
q LIMITING VOLTAGE ACCURACY: ±10mV
q –3dB BANDWIDTH (G = +1): 450MHz
q GAIN BANDWIDTH PRODUCT: 250MHz
q SLEW RATE: 1100V/µs
q ±5V AND +5V SUPPLY OPERATION
q HIGH-GAIN VERSION AVAILABLE: OPA699
DESCRIPTION
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
APPLICATIONS
q FAST LIMITING ANALOG-TO-DIGITAL
CONVERTER (ADC) INPUT BUFFERS
q CCD PIXEL CLOCK STRIPPING
q VIDEO SYNC STRIPPING
q HF MIXERS
q IF LIMITING AMPLIFIERS
q AM SIGNAL GENERATION
q NONLINEAR ANALOG SIGNAL PROCESSING
q OPA688 UPGRADE
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 opera-
tion 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.
VS = +5V
VH = +3.6V
0.1µF
VIN
715
VS = +5V
715
37
OPA698
2
4
86
5
24.9
402
402
0.1µF
VL = +1.4V
562
0.1µF
IN
100pF
102
+3.5V
REFT
VS = +5V
RSEL +VS
ADS822
10-Bit
40MSPS
REFB
+1.5V
102
INT/EXT GND
0.1µF
562
10-Bit
Data
Single-Supply Limiting ADC Input Driver
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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2002-2008, Texas Instruments Incorporated

                    
                    






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