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  Dual 25ВµV Micropower Op Amp Fits in 3mm x 3mm Package &mdash DN331
  PDF, 82 Kb, Datei veröffentlicht: Feb 2, 2004
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  Dual 25ВµV Micropower Op Amp Fits in 3mm Г— 3mm Package
  Design Note 331
  Glen Brisebois
  Introduction
  Conventional monolithic micropower op amps with a
  wide supply voltage range require a large die area and
  therefore, a large package and footprint. The unconventional LTВ®6011 dual op amp п¬Ѓts 25ОјV input precision
  micropower operation and wide 2.7V to 36V supply range
  in a tiny new package—its 3mm × 3mm DFN package
  is so small it doesn’t even have leads. The LT6011 also
  provides rail-to-rail output swing and utilizes superbeta
  input transistors to achieve picoampere input currents.
  Hall Sensor Amplifier
  Figure 1 shows the LT6011 applied as a low power Hall
  sensor amplifier. The magnetic sensitivity of a Hall sensor is proportional to the DC excitation voltage applied
  across it. With a 1V bias voltage, the sensitivity of this
  Hall sensor is specified as 4mV/mTesla of magnetic
  п¬Ѓeld. At that level of DC bias, however, the 400О© bridge
  consumes 2.5mA. Reducing the excitation voltage would
  reduce the power consumption, but it would also reduce
  the sensitivity. This is where the beauty of precision
  micropower amplification becomes especially apparent.
  The LT1790-1.25 micropower reference provides a …

Artikel

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  New Rail-to-Rail Output Op Amps Bring Precision Performance to Low Voltage Systems &mdash LT Journal
  PDF, 370 Kb, Datei veröffentlicht: May 1, 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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Herstellerklassifikation

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

Andere Namen:

LT1881IS8TRPBF, LT1881IS8 TRPBF