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Экологический статус

Application Notes

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  Measurement and Control Circuit Collection &mdash AN45
  PDF, 1.2 Мб, Файл опубликован: 5 июн 1991
  A variety of measurement and control circuits are included in this application note. Eighteen circuits, including ultra low noise amplifiers, current sources, transducer signal conditioners, oscillators, data converters and power supplies are presented. The circuits emphasize precision specifications with relatively simple configurations.
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  Application Note 45
  June 1991
  Measurement and Control Circuit Collection
  Diapers and Designs on the Night Shift
  Jim Williams
  Introduction
  During my wife’s pregnancy I wondered what it would
  really be like when the baby was finally born. Before that
  time, there just wasn’t much mothering and fathering to
  do. As a consolation, we busied ourselves watching the
  baby’s heartbeat (Figure 1) on a thrown-together fetal heart
  monitor (see References). feedings. As such, the circuits are annotated with the
  number of feedings required for their completion; e.g., a
  “3-bottle circuit” took three feedings. The circuit’s degree
  of difficulty, and Michael’s degree of cooperation, combined
  to determine the bottle rating, which is duly recorded in
  each figure.
  Low Noise and Drift Chopped Bipolar Amplifier
  Figure 2’s circuit combines the low noise of an LT®1028
  with a chopper based carrier modulation scheme to achieve
  an extraordinarily low noise, low drift DC amplifier. DC
  drift and noise performance exceed any currently available
  monolithic amplifier. Offset is inside 1ОјV, with drift less …

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  Linear Technology Magazine Circuit Collection, Volume 1 &mdash AN52
  PDF, 190 Кб, Файл опубликован: 1 янв 1993
  This application note consolidates the circuits from the first few years of Linear Technology magazine into one publication. Presented in the note are a variety of circuits ranging from a 50W high efficiency (>90%) switching regulator to steep roll-off filter circuits with low distortion to 12-bit differential temperature measurement systems.
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  Application Note 52
  January 1993
  Linear Technology Magazine Circuit Collection, Volume 1
  Richard Markell, Editor
  Introduction
  Over the past several years Linear Technology, the magazine, has come of age. From nothing, the publication has
  come into its own, as has its subscriber list. Many innovative circuits have seen the light of day in the pages of our
  now hallowed publication. This Application Note is meant to consolidate the circuits
  from the first few years of the magazine in one place.
  Circuits herein range from laser diode driver circuits to
  data acquisition systems to a 50W high efficiency switcher
  circuit. Enough said. I’ll stand aside and let the authors
  explain their circuits.
  L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
  Technology Corporation. All other trademarks are the property of their respective owners. CIRCUIT INDEX
  A-to-D Converters .2
  LTC1292: 12-BIT DATA ACQUISITION CIRCUITS .2
  Temperature-Measurement System .2
  Floating, 12-Bit Data Acquisition System .2
  Differential Temperature Measurement System .2
  MICROPOWER SO8 PACKAGED ADC CIRCUITS .4
  Floating 8-Bit Data Acquisition System .4
  0В°C – 70В°C Thermometer .5 …

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  A Seven-Nanosecond Comparator for Single Supply Operation &mdash AN72
  PDF, 882 Кб, Файл опубликован: 1 май 1998
  AN72 is an extensive discussion of the causes and cures of problems in very high speed comparator circuits. A separate applications section uses the 7ns LT1394 in V-to-F converters, crystal oscillators, clock skew generators, triggers, sampling configurations and a nanosecond pulse stretcher. Appendices cover related topics.
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  Application Note 72
  May 1998
  A Seven-Nanosecond Comparator
  for Single Supply Operation
  Guidance for Putting Civilized Speed to Work
  Jim Williams INTRODUCTION
  In 1985 Linear Technology Corporation introduced the
  LT В®1016 Comparator. This device was the first readily
  usable, high speed TTL comparator. Previous ICs were
  either too slow or unstable, preventing widespread
  acceptance. The LT1016 was, and is, a highly successful
  product.
  Recent technology trends have emphasized low power,
  single supply operation. The LT1016, although capable of
  such operation, does not include ground in its input range.
  As such, it must be biased into its operating common
  mode range for practical single supply use. A new device,
  the LT1394, maintains the speed and application civility of
  its predecessor while including ground in its input operating range. Additionally, the new comparator is faster and
  pulls significantly lower operating current than the LT1016.
  This publication borrows shamelessly from earlier LTC
  efforts, while introducing new material.1 It approximates,
  affixes, appends, abridges, amends, abbreviates, abrogates, ameliorates and augments the previous work.2 …

Design Notes

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  A Precision Wideband Current Probe for LCD Backlight Measurement &mdash DN101
  PDF, 93 Кб, Файл опубликован: 1 апр 1995
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  A Precision Wideband Current Probe for LCD Backlight
  Measurement – Design Note 101
  Jim Williams
  Evaluation and optimization of Cold Cathode Fluorescent
  Lamp (CCFL) performance requires highly accurate
  AC current measurement. CCFLs, used to backlight
  LCD displays, typically operate at 30kHz to 70kHz
  with measurable harmonic content into the low MHz
  region1. Accurate determination of RMS operating current is important for electrical and emissivity efficiency
  computations and to ensure long lamp life. Additionally,
  it is desirable to be able to perform current measurements in the presence of high common-mode voltage
  (>1000VRMS). This capability allows investigation and
  quantification of display and wiring induced losses,
  regardless of their origins in the lamp drive circuitry. operating at a gain of about 3.75. No impedance matching is required due to the probe’s low output impedance
  termination. Additional amplifiers provide distributed
  gain, maintaining wide bandwidth with an overall gain
  of about 200. The individual amplifiers avoid any possible crosstalk-based error that could be introduced
  by a monolithic quad amplifier. D1 and Rx are selected
  for polarity and value to trim overall amplifier offset.
  The 100О© trimmer sets gain, п¬Ѓxing the scale factor.
  The output drives a thermally-based, wideband RMS
  voltmeter. In practice, the circuit is built into a 2.25" Г—
  1" Г— 1" enclosure which is directly connected, via BNC …

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  Updated Operational Amplifier Selection Guide for Optimum Noise Performance &mdash DN140
  PDF, 74 Кб, Файл опубликован: 1 окт 1996
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  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. …

Модельный ряд

Классификация производителя

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

Варианты написания:

LT1122BCN8PBF, LT1122BCN8 PBF