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OPA688P Datasheet(PDF) 1 Page - Texas Instruments |
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OPA688P Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 18 page  Unity Gain Stable, Wideband VOLTAGE LIMITING AMPLIFIER OPA688 FEATURES q HIGH LINEARITY NEAR LIMITING q FAST RECOVERY FROM OVERDRIVE: 2.4ns q LIMITING VOLTAGE ACCURACY: ±15mV q –3dB BANDWIDTH (G = +1): 530MHz q SLEW RATE: 1000V/ µs q ±5V AND 5V SUPPLY OPERATION q HIGH GAIN VERSION: OPA689 APPLICATIONS q FAST LIMITING ADC INPUT BUFFERS q CCD PIXEL CLOCK STRIPPING q VIDEO SYNC STRIPPING q HF MIXERS q IF LIMITING AMPLIFIERS q AM SIGNAL GENERATION q NON-LINEAR ANALOG SIGNAL PROCESSING q COMPARATORS DESCRIPTION The OPA688 is a wideband, unity gain stable voltage- feedback op amp that offers bipolar output voltage lim- iting. 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 ±15mV. The op amp operates linearly to within 30mV of the output limit voltages. The combination of narrow nonlinear range and low limiting offset allows the limiting voltages to be set within 100mV of the desired linear output range. A fast 2.4ns recovery from limiting ensures that overdrive sig- nals will be transparent to the signal channel. Imple- menting the limiting function at the output, as opposed to the input, gives the specified limiting accuracy for any gain, and allows the OPA688 to be used in all standard op amp applications. Non-linear analog signal processing will benefit from the OPA688’s sharp transition from linear operation to output limiting. The quick recovery time supports high- speed applications. The OPA688 is available in an industry standard pinout SO-8 package. For higher gain, or transimpedance appli- cations requiring output limiting with fast recovery, consider the OPA689. TM OPA6 88 2.5 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 –2.5 LIMITED OUTPUT RESPONSE V IN V O Time (200ns/div) V H = –VL = 2.0V G = +2 2.10 2.05 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 DETAIL OF LIMITED OUTPUT VOLTAGE Time (50ns/div) V O www.ti.com Copyright © 1997, Texas Instruments Incorporated SBOS082A Printed in U.S.A. February, 2001 |
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