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Application Notes

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  Application and Optimization of a 2GHz Differential Amplifier/ADC Driver &mdash AN123
  PDF, 537 Kb, File published: Dec 8, 2009
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  Application Note 123
  December 2009
  Application and Optimization of a 2GHz Differential
  Amplifier/ADC Driver
  Cheng-Wei Pei and Adam Shou
  TABLE OF CONTENTS
  1 INTRODUCTION . 2
  1.1 LTC6400 Features .2
  1.2 Internal Gain/Feedback Resistors .2
  2 LOW DISTORTION. 3
  2.1 Actual Bandwidth vs Usable Bandwidth .3
  2.2 Low-Frequency Distortion Performance . 4
  2.3 Distortion Performance Guaranteed . 4
  3 LOW NOISE . 5
  3.1 Noise and NF vs Source Resistance.6
  3.2 Noise and Gain Circles . 7
  3.3 Signal-to-Noise Ratio vs Bandwidth .8
  4 GAIN AND POWER OPTIONS . 9
  4.1 Gain, Phase and Group Delay .9
  4.2 Gain of 1 Configuration . 10
  5 INPUT CONSIDERATIONS . 11
  5.1 Input Impedance .11
  5.2 AC Coupling vs DC Coupling. 12 …

Design Notes

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  Single-Ended to Differential Amplifier Design Tips &mdash DN454
  PDF, 77 Kb, File published: Oct 3, 2008
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  Single-Ended to Differential Amplifier Design Tips – Design Note 454
  Philip Karantzalis and Tim Regan
  Introduction
  A fully differential amplifier is often used to convert
  a single-ended signal to a differential signal, a design
  which requires three significant considerations: the
  impedance of the single-ended source must match the
  single-ended impedance of the differential amplifier,
  the amplifier’s inputs must remain within the common
  mode voltage limits and the input signal must be level
  shifted to a signal that is centered at the desired output
  common mode voltage.
  In all cases, input impedance matching to the source
  impedance is necessary to prevent high frequency
  reflections. In designs where the single-ended source
  is DC coupled to a single supply differential amplifier,
  then level shifting and the common mode limits are
  also important considerations. The interaction of these
  three design parameters is non-trivial—component
  selection requires spreadsheet analysis using the
  equations described here.
  Input Impedance Matching
  If input AC coupling is used, then impedance matching …

Articles

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  SiGe Differential Amplifier Drives High Speed ADCs at Hundreds of MHz &mdash LT Journal
  PDF, 262 Kb, File published: Jun 14, 2007
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  LINEAR TECHNOLOGY JUNE 2007 IN THIS ISSUE…
  Cover Article
  SiGe Differential Amplifier Drives
  High Speed ADCs at Hundreds of MHz
  .1
  Kris Lokere and Adam Shou VOLUME XVII NUMBER 2 SiGe Differential Amplifier
  Drives High Speed ADCs
  at Hundreds of MHz
  by Kris Lokere and Adam Shou Linear in the News….2
  Design Features
  12-,10-, and 8-Bit DACs with
  Integrated 10ppm/В°C Reference
  in 2mm Г— 2.1mm SC70.5
  Kevin Wrenner, Troy Seman
  and Mark Thoren 3ВµA Quiescent Current LDO
  Improves Efficiency for Low Power
  Circuits in Industrial, Automotive
  and Battery-Powered Systems.8
  Sam Rankin Triple Output LED Driver Delivers
  3000:1 Dimming Ratio in Buck,
  Boost or Buck-Boost Mode.10
  Bin Zhang 4.5A Monolithic LED Drivers with
  3000:1 Dimming are Ideal for a Wide …

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Manufacturer's Classification

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Speed Amplifiers (GBW > 50MHz) | Low Noise Amplifiers (
• Signal Conditioning > Amplifiers > Differential Amplifiers > Fully Differential Amplifiers

Other Names:

LTC6400CUD-20PBF, LTC6400CUD-20 PBF, LTC6400CUD20#PBF, LTC6400CUD 20#PBF