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LTC1595B LTC1595C LTC1596A LTC1596B LTC1596C

Notas de aplicación

• Descargar
  Component and Measurement Advances Ensure 16-Bit DAC Settling Time &mdash AN74
  PDF, 980 Kb, Archivo publicado: jul 1, 1998
  DAC DC specifications are relatively easy to verify. AC specifications require more sophisticated approaches to produce reliable information. In particular, the settling time of the DAC and its output amplifier is extraordinarily difficult to determine to 16-bit resolution. This application note presents methods for 16-bit DAC settling time measurement and compares results. Appendices discuss oscilloscope overdrive, frequency compensation, circuit and optimization techniques, layout, power stages and a historical perspective of precision DACs.
  Extracto del documento

  Application Note 74
  July 1998
  Component and Measurement Advances Ensure
  16-Bit DAC Settling Time
  The art of timely accuracy
  Jim Williams
  Introduction
  Instrumentation, waveform generation, data acquisition,
  feedback control systems and other application areas are
  beginning to utilize 16-bit data converters. More specifically, 16-bit digital-to-analog converters (DACs) have
  seen increasing use. New components (see Components
  for 16-Bit Digital-to-Analog Conversion, page 2) have
  made 16-bit DACs a practical design alternative1. These
  ICs provide 16-bit performance at reasonable cost compared to previous modular and hybrid technologies. The
  DC and AC specifications of the monolithic DAC’s
  approach or equal previous converters at significantly
  lower cost.
  DAC Settling Time
  DAC DC specifications are relatively easy to verify. Measurement techniques are well understood, albeit often
  tedious. AC specifications require more sophisticated
  approaches to produce reliable information. In particular,
  the settling time of the DAC and its output amplifier is
  extraordinarily difficult to determine to 16-bit resolution. …

• Descargar
  A Standards Lab Grade 20-Bit DAC with 0.1ppm/В° Drift: The Dedicated Art of Digitizing One Part Per Million &mdash AN86
  PDF, 540 Kb, Archivo publicado: enero 1, 2001
  This publication details a true 1ppm D-to-A converter. Total DC error of this processor corrected DAC remains within 1ppm from 18-32°C, including reference drift. DAC error exclusive of reference drift is substantially better. Construction details and performance verification techniques are included, along with a complete software listing.
  Extracto del documento

  Application Note 86
  January 2001
  A Standards Lab Grade 20-Bit DAC with 0.1ppm/В°C Drift
  The Dedicated Art of Digitizing One Part Per Million
  Jim Williams
  J. Brubaker
  P. Copley
  J. Guerrero
  F. Oprescu INTRODUCTION
  Significant progress in high precision, instrumentation
  grade D-to-A conversion has recently occurred. Ten years
  ago 12-bit D-to-A converters (DACs) were considered
  premium devices. Today, 16-bit DACs are available and
  increasingly common in system design. These are true
  precision devices with less than 1LSB linearity error and
  1ppm/В°C drift.1 Nonetheless, there are DAC applications
  that require even higher performance. Automatic test
  equipment, instruments, calibration apparatus, laser trimmers, medical electronics and other applications often
  require DAC accuracy beyond 16 bits. 18-bit DACs have
  been produced in circuit assembly form, although they are
  expensive and require frequent calibration. 20 and even
  23+ (0.1ppm!) bit DACs are represented by manually
  switched Kelvin-Varley dividers. These devices, although …

Notas de Diseño

• Descargar
  New 16-Bit SO-8 DAC Has 1LSB (Max) INL and DNL Over Industrial Temperature Range &mdash DN173
  PDF, 90 Kb, Archivo publicado: feb 1, 1998
  Extracto del documento

  New 16-Bit SO-8 DAC Has 1LSB (Max) INL and DNL Over
  Industrial Temperature Range – Design Note 173
  Jim Brubaker, William C. Rempfer and Kevin R. Hoskins
  The new LTC В®1595/LTC1596 16-bit DACs from LTC
  provide the easiest to use, most cost effective, highest performance solution for upgrading industrial and
  instrumentation applications from 12 bits to 16 bits.
  They feature: В±1LSB (max) INL and DNL over the industrial
  temperature range Ultralow, 1nV-s glitch impulse В±10V output capability Small SO-8 package (LTC1595) Pin compatible upgrade for industry standard 12-bit
  DACs (DAC8043/DAC8143 and AD7543) can be upgraded to true 16-bit resolution and linearity
  without requiring more precise op amps.
  16-Bit Accuracy Over Temperature
  Without Autocalibration
  Autocalibrated DACs achieve their 16-bit accuracy at the
  cost of additional autocalibration circuitry that increases
  size and cost, requires cumbersome calibration overhead for the user and, because of poor linearity drift,
  requires DAC recalibration every time the temperature
  changes.
  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.
  0.5
  0.4
  INTEGRAL NONLINEARITY (LSB) Nice Features of the 16-Bit DACs …

Artículos

• Descargar
  Component and Measurement Advances Ensure 16-Bit DAC Settling Time (Part One) &mdash LT Journal
  PDF, 262 Kb, Archivo publicado: agosto 1, 1998
  Extracto del documento

  DESIGN INFORMATION Component and Measurement
  Advances Ensure 16-Bit DAC
  by Jim Williams
  Settling Time (Part One)
  Introduction
  Instrumentation, waveform generation, data acquisition, feedback
  control systems and other application
  areas are beginning to utilize 16-bit
  data converters. More specifically, 16bit digital-to-analog converters (DACs)
  have seen increasing use. New components (see the sidebar “Components
  for 16-Bit Digital-to-Analog Conversion” on page 31) have made 16-bit
  DACs a practical design alternative.
  These ICs provide 16-bit performance
  at reasonable cost compared to previous modular and hybrid technologies.
  The DC and AC specifications of the
  monolithic DACs approach or equal
  previous converters at significantly
  lower cost. DAC Settling Time
  DAC DC specifications are relatively
  easy to verify. Measurement techniques are well understood, albeit often
  tedious. AC specifications require
  more sophisticated approaches to
  produce reliable information. In particular, the settling time of the DAC …

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• Data Conversion > Digital-to-Analog Converters (DAC) > Unipolar Digital-to-Analog Converters (DAC) | Current Output DACs