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Application Notes

• Download
  Linear Technology Magazine Circuit Collection, Volume V: Data Conversion, Interface and Signal Conditioning Products &mdash AN87
  PDF, 1.5 Mb, File published: Nov 1, 2000
  Application Note 87 is the fifth in a series that excerpts useful circuits from Linear Technology magazine. Data conversion, interface and signal conditioning circuits from issue VI:1 (February 1996) through issue VIII:4 (November 1998) are featured. Like its predecessor, AN67, this Application Note includes circuits for high speed video, interface and hot swap circuits, active RC and switched capacitor filter circuitry and a variety of data conversion and instrumentation circuits. All circuits are conveniently indexed by type.
  Extract from the document

  Application Note 87
  November 2000 Linear Technology Magazine Circuit Collection, Volume V
  Data Conversion, Interface and Signal Conditioning Products
  Richard Markell, Editor
  INTRODUCTION
  Application Note 87 is the fifth in a series that excerpts
  useful circuits from Linear Technology magazine to preserve them for posterity. This application note highlights
  data conversion, interface and signal conditioning circuits
  from issue VI:1 (February 1996) through issue VIII:4
  (November 1998). Like its predecessor, AN67, this Application Note includes circuits for high speed video, interface and hot swap circuits, active RC and switched capacitor filter circuitry and a variety of data conversion and instrumentation circuits. There are also several circuits
  that cannot be so neatly categorized. So, without further
  ado, I’ll let the authors describe their circuits.
  Note: Article Titles appear in this application note exactly
  as they originally appeared in Linear Technology magazine. This may result in some inconsistency in the usage
  of terminology. TABLE OF CONTENTS
  Introduction . 1
  DATA CONVERTERS
  The LTC®1446 and LTC1446L: World’s First Dual 12-Bit DACs in SO-8 Packages . 3
  Multichannel A/D Uses a Single Antialiasing Filter. 4
  LTC1454/54L and LTC1458/58L: Dual and Quad 12-Bit, Rail-to-Rail, Micropower DACs . 5
  Micropower ADC and DAC in SO-8 Give PC 12-Bit Analog Interface . 7
  The LTC1594 and LTC1598: Micropower 4-and 8-Channel 12-Bit ADCs . 10
  MUX the LTC1419 Without Software . 13 …

Design Notes

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  UL Isolated Self-Powered Sensing &mdash DN204
  PDF, 80 Kb, File published: Apr 3, 1999
  Extract from the document

  advertisement UL Isolated Self-Powered Sensing – Design Note 204
  Wayne Shumaker
  Introduction
  One of the major drawbacks with isolated sensing is the
  need for an isolated power supply. The LTCВ®1531 combines an isolated voltage comparator and voltage reference powered through its own internal capacitive isolation
  barrier. This barrier provides 2500VRMS of isolation. The
  LTC1531 provides a way to design control circuits that
  require an isolated sensor, such as a thermistor, thermocouple or R-bridge sensor, with power and signal communication across an isolation barrier. Often there is
  enough power available on the isolated side to deliver
  several microamps of continuous power to external micropower sensor circuits, or alternatively several milliamps
  for short durations.
  The LTC1531 powers the isolated side with a voltage
  pump driving the internal isolation caps formed in the lead
  frame. This voltage is rectified and stored on the isolated
  side. Periodically, the voltage pump stops and, if the
  isolated side has stored approximately 3.3V on an external capacitor, a comparison is done with the result sent
  back to the powered side where it is latched. This latched
  result can be used with the internal zero-cross comparator, with pulsed output, for controlling a triac. To aid in the
  isolated comparison, there is a 2.5V, 5mA, 100Вµs pulsed
  reference, VREG. The isolated comparator samples at the
  , LTC and LT are registered trademarks of Linear Technology Corporation.
  AC
  120V …

Model Line

Manufacturer's Classification

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > Precision Amplifiers (Vos | Low Power Amplifiers (Is < 1mA/amp) | High Voltage Amplifiers (>12V) | Rail-to-Rail Amplifiers
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Amplifiers