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• Herunterladen
  Instrumentation Applications for a Monolithic Oscillator: A Clock for All Reasons &mdash AN93
  PDF, 1.1 Mb, Datei veröffentlicht: Feb 1, 2003
  Instrumentation applications for a monolithic programmable oscillator are presented in this publication. Circuits include platinum and thermistor based thermometers, an isolated thermometer and three relative humidity signal conditioners. Bipolar and FET input chopper stabilized amplifiers with noise below 45nV (0.1Hz to 10Hz) are detailed. Two clock tunable sine wave generators with settable amplitude appear, as well as a tunable notch filter, an interval generator and an A to D converter. The oscillator's performance is contrasted against other approaches and its interval operation discussed.
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  Application Note 93
  February 2003
  Instrumentation Applications for a Monolithic Oscillator
  A Clock for All Reasons
  Jim Williams INTRODUCTION Clock Types Oscillators are fundamental circuit building blocks. A
  substantial percentage of electronic apparatus utilize oscillators, either as timekeeping references, clock sources,
  for excitation or other tasks. The most obvious oscillator
  application is a clock source in digital systems.1 A second
  area is instrumentation. Transducer circuitry, carrier based
  amplifiers, sine wave formation, filters, interval generators and data converters all utilize different forms of
  oscillators. Although various techniques are common, a
  simply applied, broadly tunable oscillator with good accuracy has not been available. Commonly employed oscillators are resonant element
  based or RC types.2 Figure 1 shows two of each. Quartz
  crystals and ceramic resonators offer high initial accuracy
  and low drift (particularly quartz) but are essentially
  untunable over any significant range. Typical RC types
  have lower initial accuracy and increased drift but are
  easily tuned over broad ranges. A problem with conventional RC oscillators is that considerable design effort is
  required to achieve good specifications. A new device, the
  LTC1799, is also an RC type but fills the need for a simply
  applied, broadly tunable, accurate oscillator. Its accuracy
  and drift specifications fit between resonator based types
  and typical RC oscillators. Additionally, its board footprint, …

Konstruktionshinweise

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  Rail-to-Rail I/O and 2.4V Operation Allow UltraFast Comparators to be Used on Low Voltage Supplies &mdash DN248
  PDF, 105 Kb, Datei veröffentlicht: Jan 1, 2001
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  Rail-to-Rail I/O and 2.4V Operation Allow UltraFast Comparators to be Used on Low Voltage Supplies
  Design Note 248
  Glen Brisebois
  The new LTВ®1711 to LT1714 family of UltraFastв„ў
  comparators have full differential rail-to-rail inputs and
  outputs and operate down to 2.4V, allowing unfettered
  application on low supply voltages. The LT1711 (single)
  and LT1712 (dual) are specified at 4.5ns of propagation
  delay and 100MHz toggle frequency. The lower power
  LT1713 (single) and LT1714 (dual) are specified at 7ns
  of propagation delay and 65MHz toggle frequency. All
  of these comparators are fully equipped to support
  multiple supply applications and have Latch Enable
  (LE) pins and complementary outputs like the popular
  LT1016, LT1116, LT1671 and LT1394. They are available in MSOP and SSOP packages, fully specified
  over commercial and industrial temperature ranges
  on 2.7V, 5V and В±5V supplies.
  Simultaneous Full Duplex 75Mbaud Interface
  with Only Two Wires
  The circuit of Figure 1 shows a simple, fully bidirectional, differential 2-wire interface that gives good
  results to 75Mbaud, using the lower power LT1714.
  Eye diagrams under conditions of unidirectional and
  bidirectional communication are shown in Figures 2 …

Artikel

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  New UltraFast Comparators: Rail-to-Rail Inputs and 2.4V Operation Allow Use on Low Supplies &mdash LT Journal
  PDF, 194 Kb, Datei veröffentlicht: Feb 1, 2001
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  DESIGN FEATURES New UltraFast Comparators: Rail-toRail Inputs and 2.4V Operation Allow
  Use on Low Supplies
  by Glen Brisebois
  Introduction
  The new LT1711 family of UltraFast
  comparators has fully differential railto-rail inputs and outputs and
  operates on supplies as low as 2.4V,
  allowing unfettered application on low
  voltages. The LT1711 (single) and
  LT1712 (dual) are specified at 4.5ns
  of propagation delay and 100MHz
  toggle frequency. The low power
  LT1713 (single) and LT1714 (dual)
  are specified at 7ns of propagation
  delay and 65MHz toggle frequency.
  All of these comparators are fully
  equipped to support multiple-supply
  applications, and have latch-enable
  pins and complementary outputs like
  the popular LT1016, LT1671 and
  LT1394. They are available in MSOP
  and SSOP packages, fully specified
  over commercial and industrial temperature ranges on 2.7V, 5V and В±5V …

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• Signal Conditioning > Comparators > High Speed Comparators

Andere Namen:

LT1671IS8TRPBF, LT1671IS8 TRPBF