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Notas de Diseño

• Descargar
  Updated Operational Amplifier Selection Guide for Optimum Noise Performance &mdash DN140
  PDF, 74 Kb, Archivo publicado: oct 1, 1996
  Extracto del documento

  Operational Amplifier Selection Guide for
  Optimum Noise Performance – Design Note 140
  Frank Cox
  Eight years ago, George Erdi wrote a very useful Design
  Note (DN6) that presented information to aid in the
  selection of op amps for optimum noise performance,
  in both graphical and tabular form. Design Note 140 is
  an update of DN6. It covers new low noise op amps as
  well as some high speed op amps. Although a great deal
  has changed in eight years, especially in electronics,
  noise is still a critical issue in op amp circuit design
  and the LTВ®1028 is still the lowest noise op amp for
  low source impedance applications.
  The amount of noise an op amp circuit will produce
  is determined by the device used, the total resistance
  in the circuit, the bandwidth of the measurement, the
  temperature of the circuit and the gain of the circuit. A
  convenient п¬Ѓgure of merit for the noise performance
  of an op amp is the spectral density or spot noise. This
  is obtained by normalizing the measurement to a unit
  of bandwidth. Here the unit is 1Hz and the noise is reported as “nV/√Hz.” The noise in a particular application
  bandwidth can be calculated by multiplying the spot
  noise by the square root of the application bandwidth. …

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  Source Resistance Induced Distortion in Op Amps &mdash DN84
  PDF, 355 Kb, Archivo publicado: jul 1, 1994
  Extracto del documento

  Source Resistance Induced Distortion in Op Amps
  Design Note 84
  William H. Gross RS
  VIN
  20VP-P +
  DUT –
  –15V VOUT DISTORTION
  ANALYZER DN84 F01 Figure 1 Results
  Unfortunately there is no easy way to predict which amplifiers will have the lowest source resistance induced
  distortion from the data sheets. There are two main
  causes of the distortion: nonlinear input resistance and
  nonlinear input capacitance. At first thought, one would
  not expect the small input capacitance of an op amp to
  cause distortion at a few kHz. But a 10k source is loaded 07/94/84_conv TOTAL HARMONIC DISTROTION (%) 10
  OP27 0.01 12 LF356 14
  0.001 0.0001
  100 16 LT1169
  LT1355 LT1124
  10k
  1k
  SOURCE RESISTANCE (О©) 18 100k
  DN84 F02 Figure 2. 1kHz Distortion vs Source Resistance
  1 …

Artículos

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  Consider New Precision Amplifiers for Updated Industrial Equipment Designs &mdash LT Journal
  PDF, 154 Kb, Archivo publicado: sept 1, 2009
  Extracto del documento

  L DESIGN FEATURES Consider New Precision Amplifiers for
  Updated Industrial Equipment Designs
  by Brian Black Introduction
  Industrial equipment is designed for
  long life cycles, so the electronic components used in industrial applications
  are often chosen with significant emphasis on proven performance, quality
  and reliability. Precision amplifiers are
  no exception. Even if new and innovative amplifiers become available over a
  product’s lifetime, a redesigned board
  is often built using the same proven
  op amps in the old board. Even for
  entirely new applications, designers
  will choose amplifiers that have proven
  their mettle in other circuits, making a
  choice based more on familiarity than
  performance.
  Although an amplifier may have
  been tried and proven in a design, it
  is not necessarily the best solution for
  every new design. Many can benefit
  from using more recently released
  amplifiers, which can improve overall
  system performance, reduce power …

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Clasificación del fabricante

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Voltage Amplifiers (>12V) | Low Noise Amplifiers ( | Low Bias Current Amplifiers (Ib < 100pA) | JFET Input Amplifiers

Otros nombres:

LT1169CS8PBF, LT1169CS8 PBF