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Application Notes

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  Linear Technology Magazine Circuit Collection, Volume III &mdash AN67
  PDF, 1.2 Mb, File published: Sep 1, 1996
  Application Note 67 is a collection of circuits for data conversion, interface and signal processing from the first five years of Linear Technology. This application note includes circuits such as fast video multiplexers for high speed video, an ultraselective bandpass filter circuit with adjustable gain, and a fully differential, 8-channel, 12-bit A/D system. The categories included in this app note are data conversion, interface, filters, instrumentation, video/op amps and miscellaneous circuits.
  Extract from the document

  Application Note 67
  September 1996
  Linear Technology Magazine Circuit Collection, Volume III
  Data Conversion, Interface and Signal Processing
  Richard Markell, Editor
  INTRODUCTION
  Application Note 67 is a collection of circuits from the first
  five years of Linear Technology, targeting data conversion,
  interface and signal processing applications. This
  Application Note includes circuits such as fast video
  multiplexers for high speed video, an ultraselective
  bandpass filter circuit with adjustable gain and a fully differential, 8-channel, 12-bit A/D system. The categories
  included herein are data conversion, interface, filters,
  instrumentation, video/op amps and miscellaneous
  circuits. Application Note 66, which covers power products
  and circuits from Linear Technology ’s first five years, is
  also available from LTC. ARTICLE INDEX
  Data Conversion . 3
  Fully Differential, 8-Channel, 12-Bit A/D System Using the LTCВ®1390 and LTC1410 . 3
  12-Bit DAC Applications . 5
  LTC1329 Micropower, 8-Bit, Current Output DAC Used for Power Supply Adjustment,
  Trimmer Pot Replacement . 7
  12-Bit Cold Junction Compensated, Temperature Control System with Shutdown . 8 …

Design Notes

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  C-Load TM Op Amps Conquer Instabilities &mdash DN107
  PDF, 495 Kb, File published: Jul 1, 1995
  Extract from the document

  C-Load Op Amps Conquer Instabilities – Design Note 107
  Kevin R. Hoskins
  Introduction
  Linear Technology Corporation has taken advantage of
  advances in process technology and circuit innovations
  to create a series of C-Loadв„ў operational amplifiers that
  are tolerant of capacitive loading, including the ultimate,
  amplifiers that remain stable driving any capacitive load.
  This series of amplifiers has a bandwidth that ranges from
  160kHz to 140MHz. These amplifiers are appropriate for
  a wide range of applications from coaxial cable drivers to
  analog-to-digital converter (ADC) input buffer/amplifiers.
  Driving ADCs
  Most contemporary ADCs incorporate a sample-and-hold
  (S/H). A typical S/H circuit is shown in Figure 1. The hold
  capacitor’s (C1) size varies with the ADC’s resolution but
  is generally in the range of 5pF to 20pF, 10pF to 30pF and
  10pF to 50pF for 8-, 10-and 12-bit ADCs, respectively. gracefully and accurately drive capacitive loads, such as
  Linear Technology’s C-Load line of monolithic amplifiers.
  Table 1 lists Linear Technology’s unconditionally stable
  voltage feedback C-Load amplifiers. Table 2 lists other
  voltage feedback C-Load amplifiers that are stable with
  loads up to 10,000pF. …

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  Selecting Op Amps for Precision 16-Bit DACs &mdash DN214
  PDF, 76 Kb, File published: Oct 1, 1999
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  Selecting Op Amps for Precision 16-Bit DACs – Design Note 214
  Kevin R. Hoskins, Jim Brubaker and Patrick Copely
  The LTC В®1597 16-bit current output DAC offers a new
  level of accuracy and cost efficiency. It has exceptionally high accuracy and low drift: ±1LSB (max) INL and
  DNL over temperature. It eliminates costly external
  resistors in bipolar applications because it includes
  tightly trimmed, on-chip 4-quadrant resistors. To help
  achieve the best circuit DC performance, this design
  note offers two sets of easy-to-use design equations for
  evaluating an op amp’s effects on the DAC’s accuracy
  in terms of INL, DNL, offset (unipolar), zero (bipolar),
  unipolar and bipolar gain errors. With this information,
  selecting an op amp that gives the accuracy you need
  in a unipolar or bipolar application is easy.
  Figure 1 shows a unipolar application that combines the
  LTC1597 DAC and LTВ®1468 fast settling op amp. The
  equations for evaluating the effects of the op amp on
  the DAC’s accuracy are shown in Table 1. Quick work on
  Table 1’s equations with a calculator gives the results
  shown in Table 2. These are the changes the op amp can cause to the INL, DNL, unipolar offset and gain error
  of the DAC. Note, all are substantially less than 1LSB.
  Thus, the LT1468 is an excellent choice.
  The LTC1597’s internal design is very insensitive to …

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  C-Load TM Op Amps Tame Instabilities &mdash DN83
  PDF, 929 Kb, File published: Jun 1, 1994
  Extract from the document

  C-Load Op Amps Tame Instabilities – Design Note 83
  Richard Markell, George Feliz and William Jett
  Introduction
  By taking advantage of advances in process technology
  and innovative circuit design, Linear Technology Corporation has developed a series of C-Loadв„ў op amps which
  are tolerant of capacitive loading, including the ultimate,
  amplifiers which are stable with any capacitive load. These
  amplifiers span a range of bandwidths from 1MHz to
  140MHz. They are suited for a wide range of applications
  from coaxial cable drivers to capacitive transducer exciters.
  The Problem
  The cause of the capacitive load stability problem in most
  amplifiers is the pole formed by the load capacitance and
  the open-loop output impedance of the amplifier. This
  output pole increases the phase lag around the loop which
  reduces the phase margin of the amplifier. If the phase
  lag is great enough the amplifier will oscillate.
  External networks can be used to improve the amplifier’s
  stability with a capacitive load but have serious drawbacks.
  For instance, most designers are familiar with the use of
  a series resistor RS between the load and the amplifier
  output. The optimum value of RS depends on the load
  capacitance, so this approach isn’t useful for ill-defined …

Articles

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  New Rail-to-Rail Output Op Amps Bring Precision Performance to Low Voltage Systems &mdash LT Journal
  PDF, 370 Kb, File published: 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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  Consider New Precision Amplifiers for Updated Industrial Equipment Designs &mdash LT Journal
  PDF, 154 Kb, File published: Sep 1, 2009
  Extract from the document

  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 …

Model Line

Manufacturer's Classification

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Voltage Amplifiers (>12V) | Precision Amplifiers (Vos | Low Power Amplifiers (Is < 1mA/amp) | Low Bias Current Amplifiers (Ib < 100pA)
• Space & Harsh Environment > Military Hermetic (M)
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Amplifiers

Other Names:

LT1112IN8PBF, LT1112IN8 PBF