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Application Notes

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  Linear Technology Magazine Circuit Collection, Volume V: Data Conversion, Interface and Signal Conditioning Products &mdash AN87
  PDF, 1.5 Мб, Файл опубликован: 1 ноя 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.
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  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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  A New Low Power, High Output Current Dual CFA Makes xDSL Line Driving Clean and Easy &mdash DN187
  PDF, 75 Кб, Файл опубликован: 3 авг 1998
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  A Low Power, High Output Current Dual CFA Makes xDSL Line
  Driving Clean and Easy – Design Note 187
  Adolfo A Garcia
  Introduction
  Driving the balanced lines of high speed modems has
  become a very popular application for high speed,
  high output current, dual operational amplifiers. High
  amplifier speed is required to faithfully process signal
  passbands of at least 1MHz bandwidth, and high
  output currents are required to meet peak drive levels
  into 100О© or 135О© termination. Taking into account
  peak-to-average signal ratios in these applications,
  Table 1 summarizes peak voltage/current drive levels
  required by current xDSL systems. The peak voltage
  and current drive values shown are for ADSL systems
  with 100О© termination and HDSL/HDSL2 systems with
  135О© termination.
  Table 1. Peak Drive Levels for Popular xDSL Systems
  Nominal
  Peak
  Transmit Power Voltage xDSL Peak
  Current 13.5dBm 5.6VP-P 42mAP-P ADSL DMT Upstream 13dBm 15VP-P 150mAP-P ADSL CAP Upstream 13dBm 8.5VP-P 86mAP-P ADSL CAP Downstream 20dBm 18.9VP-P 190mAP-P
  19.6VP-P 146mAP-P HDSL HDSL2 16.5dBm There are ampliп¬Ѓer products available today that can …

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• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Speed Amplifiers (GBW > 50MHz) | Low Noise Amplifiers ( | High Output Current Amplifiers (>100mA) | Current Feedback Amplifiers | High Voltage Amplifiers (>12V)