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LT1819 LT1819

应用须知

• 下载
  2 Nanosecond, .1% Resolution Settling Time Measurement for Wideband Amplifiers &mdash AN128
  PDF, 1.1 Mb, 档案已发布: Aug 16, 2010
  Instrumentation, waveform synthesis, data acquisition, feedback control systems and other application areas utilize wideband amplifiers. Current generation components feature good DC precision while maintaining high speed operation. Verifying precision operation at high speed is essential, and presents a high order measurement challenge.
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  Application Note 128
  June 2010
  2 Nanosecond, 0.1% Resolution Settling Time
  Measurement for Wideband Amplifiers
  Quantifying Quick Quiescence
  Jim Williams
  INTRODUCTION
  Instrumentation, waveform synthesis, data acquisition,
  feedback control systems and other application areas utilize wideband amplifiers. Current generation components
  (see box section, page 2, “A Precision Wideband Amplifier
  with 9ns Settling Time”) feature good DC precision while
  maintaining high speed operation. Verifying precision
  operation at high speed is essential, and presents a high
  order measurement challenge.
  SETTLING TIME DEFINED
  Amplifier DC specifications are relatively easy to verify.
  Measurement techniques are well understood, albeit
  often tedious. AC specifications require more sophisticated approaches to produce reliable information. In
  particular, amplifier settling time is extraordinarily difficult
  to determine. Settling time is the elapsed time from input
  application until the output arrives at and remains within
  a specified error band around the final value. It is usually
  specified for a full-scale transition. Figure 1 shows that …

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  Slew Rate Verification for Wideband Amplifiers: The Taming of the Slew &mdash AN94
  PDF, 594 Kb, 档案已发布: May 1, 2003
  Wideband amplifiers achieve slew rates beyond 2500V/µs. Verifying slew rates at this speed requires special techniques. In particular, a subnanosecond rise time input step is necessary for accurate slew rate measurement. A pulse generator with a 360 picosecond rise time is shown, and its construction detailed. Slew rate test results using this generator are presented and compared to data taken with slower rise time generators. Appendices cover high speed measurement technique, generator output level shifting and picosecond signal path construction considerations.
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  Application Note 94
  May 2003
  Slew Rate Verification for Wideband Amplifiers
  The Taming of the Slew
  Jim Williams
  INTRODUCTION
  Slew rate defines an amplifier’s maximum rate of output
  excursion. This specification sets limits on undistorted
  bandwidth, an important capability in A/D driver applications. Slew rate also influences achievable performance in
  D/A output stages, filters, video amplification and data
  acquisition. Because of its importance, amplifier slew rate
  must be verified by measurement. Deriving a measurement approach requires understanding slew rate’s relationship to amplifier dynamics. total elapsed time from input application until the output
  arrives at and remains within a specified error band
  around the final value is the settling time.1 Amplifier Dynamic Response Historically, slew rate measurement has been relatively
  simple.2 Early amplifiers had slew rates of typically 1V/Вµs,
  with later versions sometimes reaching hundreds of
  volts/Вµs. Standard laboratory pulse generators easily supplied rise times well beyond amplifier speeds. As slew rates
  have crossed 1000V/µs, the pulse generator’s finite rise
  time has become a concern. A recent device, the LT1818
  (See Box Section, “A 2500V/µs Slew Rate Amplifier with Figure 1 shows that amplifier dynamic response components include delay, slew and ring times. The delay time is
  small and is almost entirely due to amplifier propagation
  delay. During this interval there is no output movement.
  During slew time the amplifier moves at its highest …

文章

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  2500V/µs Slew Rate Op Amps Process Large Signals with Low Distortion at High Frequencies &mdash LT Journal
  PDF, 388 Kb, 档案已发布: Dec 1, 2002
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  DESIGN FEATURES 2500V/Вµs Slew Rate Op Amps Process
  Large Signals with Low Distortion at
  High Frequencies
  by Kris Lokere and Glen Brisebois
  Introduction
  The LT1818 and LT1819 are low distortion single and dual operational
  amplifiers that offer 400MHz gain
  bandwidth product and 2500V/Вµs
  slew rate. The parts operate with supplies from В±2V to В±6V and draw a
  typical supply current of only 9mA
  per amplifier.
  The amplifiers can drive 100Ω loads
  with a low distortion of –85dBc relative to a 5MHz, 2VP–P signal. In single
  5V supply applications, the output
  swings to 0.8V from either supply rail
  with a 500Ω load (to 2.5V), and to
  1.0V with a 100Ω load. The output
  current drive capability is typically
  70mA. The low distortion and good
  output drive capability, combined with
  the 6nV/в€љHz input voltage noise,
  make the LT1818/LT1819 an ideal
  choice for a wide variety of applications. …

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制造商分类

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Speed Amplifiers (GBW > 50MHz) | High Voltage Amplifiers (>12V) | Low Noise Amplifiers (

其他名称:

LT1818IS5PBF, LT1818IS5 PBF