Datasheet Linear Technology LT1884 — Даташит

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Параметры

Экологический статус

Другие варианты исполнения

LT1885 LT1885

Application Notes

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  Signal Sources, Conditioners and Power Circuitry Circuits of the Fall, 2004 &mdash AN98
  PDF, 886 Кб, Файл опубликован: 19 ноя 2004
  Eighteen circuits are presented in this compilation. Signal sources include a voltage controlled current source, an amplitude/frequency stabilized sine wave oscillator, a versatile, 0V to 50V wideband level shift and four sub-nanosecond pulse generators with risetimes as low as 20ps. Five signal conditioners appear; a unique, single positive rail powered amplifier with output to (and below) zero volts, a milliohmmeter, a 0.02% accurate instrumentation amplifier with 120dB CMRR at 125VCM, a 100MHz switch with 5mV control channel feedthrough and a 5V powered, 15ppm linearity quartz stabilized V→F, converter. The power circuits section features a Xenon flashlamp supply, two 5V powered, 0V to 300V DC/DC converters, a fixed 200V output circuit for APD bias, a 100W 0V to 500V, 28V powered converter and a high current paralleling scheme for linear regulators. Two appended sections consider measurement technique and connection practice in sub-nanosecond circuits.
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  Application Note 98
  November 2004
  Signal Sources, Conditioners and Power Circuitry
  Circuits of the Fall, 2004
  Jim Williams
  Introduction
  Occasionally, we are tasked with designing circuitry for a
  specific purpose. The request may have customer origins
  or it may be an in-house requirement. Alternately, a circuit
  may be developed because its possibility is simply too
  attractive to ignore1. Over time, these circuits accumulate,
  encompassing a wide and useful body of proven capabilities. They also represent substantial effort. These considerations make publication an almost obligatory proposition
  and, as such, a group of circuits is presented here. This is
  not the first time we have displayed such wares and, given
  the encouraging reader response, it will not be the last2.
  Eighteen circuits are included in this latest effort, roughly
  arranged in the categories given in this publication’s title.
  They appear at the next paragraph.
  Voltage Controlled Current Source—Ground Referred
  Input and Output
  A voltage controlled current source with ground referred
  input and output is difficult to achieve. Executions exist,
  but are often cumbersome, involving numerous components. Figure 1’s conceptual design utilizes a differential …

Design Notes

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  Rail-to-Rail Amplifiers Operate on 2.7V with 20ВµV Offset &mdash DN230
  PDF, 75 Кб, Файл опубликован: 15 апр 2001
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  Rail-to-Rail Amplfiiers Operate on 2.7V with 20ВµV Offset
  Design Note 230
  Glen Brisebois
  The LTВ®1677 and LT1884 are the latest results of Linear
  Technology’s quest for the “ideal” Op Amp1. Both of
  them will operate with supplies down to 2.7V, have
  only 20ОјV of input offset voltage and have rail-to-rail
  outputs. The LT1677 features very low noise, 3.2nV/в€љHz;
  the LT1884 features very low 150pA input bias current.
  Each of the two application circuits shown below take
  advantage of some particular subset of the features of
  these amplifiers. To complicate matters, Geophones are often buried in
  order to avoid interference from traffic and other surface
  effects and so are often necessarily remote.
  The circuit in Figure 1 applies a gain of ~100 to the
  Geophone signal and transmits this back to the operator
  by modulating its own supply current. U2 is an LT1635
  configured as a stable current source of 5mA. This
  then powers the LT1677 as well as another LT1635,
  this time configured as a 3V shunt regulator. Resistors
  R6 and R7 set up a DC bias voltage of 1.85V, centering
  the output swing offset by Q3 and keeping the LT1677 Remote 2-Wire Geophone Preamp
  Using the Low Noise LT1677 …

Статьи

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  New Rail-to-Rail Output Op Amps Bring Precision Performance to Low Voltage Systems &mdash LT Journal
  PDF, 370 Кб, Файл опубликован: 1 май 2000
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  DESIGN FEATURES New Rail-to-Rail Output Op Amps
  Bring Precision Performance to
  Low Voltage Systems
  by Alexander Strong
  and Gary Maulding Introduction
  Linear Technology has recently
  released several new high precision
  op amps for use in low voltage systems. The LT1677, LT1881, LT1882,
  LT1884 and LT1885 all operate on
  power supplies from 3V or lower up to
  36V and have rail-to-rail output voltage swing. These amplifiers allow high
  precision circuits to be implemented
  on low voltage power supplies,
  including single positive supplies.
  Rail-to-rail output stages maintain
  the output signal dynamic range by
  eliminating the base-emitter voltage
  drops of conventional emitter-follower
  output stages. Offset voltages are trimmed to less than 80ВµV, with the low
  temperature drift and low noise to be
  expected from bipolar transistor
  designs. High open-loop voltage gains
  maintain this accuracy over the output swing range. …

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Классификация производителя

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > Rail-to-Rail Amplifiers | Precision Amplifiers (Vos | Low Power Amplifiers (Is < 1mA/amp) | High Voltage Amplifiers (>12V) | Low Bias Current Amplifiers (Ib < 100pA)