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Datasheets

Design Notes

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  Updated Operational Amplifier Selection Guide for Optimum Noise Performance &mdash DN140
  PDF, 74 Кб, Файл опубликован: 1 окт 1996
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  Operational Amplifier Selection Guide for
  Optimum Noise Performance – Design Note 140
  Frank Cox
  Eight years ago, George Erdi wrote a very useful Design
  Note (DN6) that presented information to aid in the
  selection of op amps for optimum noise performance,
  in both graphical and tabular form. Design Note 140 is
  an update of DN6. It covers new low noise op amps as
  well as some high speed op amps. Although a great deal
  has changed in eight years, especially in electronics,
  noise is still a critical issue in op amp circuit design
  and the LTВ®1028 is still the lowest noise op amp for
  low source impedance applications.
  The amount of noise an op amp circuit will produce
  is determined by the device used, the total resistance
  in the circuit, the bandwidth of the measurement, the
  temperature of the circuit and the gain of the circuit. A
  convenient п¬Ѓgure of merit for the noise performance
  of an op amp is the spectral density or spot noise. This
  is obtained by normalizing the measurement to a unit
  of bandwidth. Here the unit is 1Hz and the noise is reported as “nV/√Hz.” The noise in a particular application
  bandwidth can be calculated by multiplying the spot
  noise by the square root of the application bandwidth. …

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  Flash Memory VPP Generator Reference Designs &mdash DN97
  PDF, 124 Кб, Файл опубликован: 1 фев 1995
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  advertisement Flash Memory VPP Generator Reference Designs
  Design Note 97
  Mitchell Lee
  The VPP generator circuits shown here cover a range of
  30mA to 240mA with 3.3V or 5V inputs as noted. Table 1
  summarizes these circuits for quick reference.
  30mA from 5V Input
  INPUT
  5V + 60mA from 5V Input 4.7ВµF 4.7ВµF VOUT
  C1+ VCC +
  4.7µF C1–
  C2+ 220nF C2 – SHUTDOWN* SHDN GND 470nF L1
  10ВµH DN97 F02 Charge pump design uses no inductors. This is a minimum
  component count, minimum size solution. 60mA from 3.3V/5V Input VPP2
  0.1µF C2 – *0 = PROGRAM, 1 = SHUTDOWN DN97 F01 Charge pump design uses no inductors. This is a minimum
  component count, minimum size solution. VPP1
  0.1ВµF 470nF GND *0 = PROGRAM, 1 = SHUTDOWN VCC
  3.3V/5V 4.7ВµF LTC1263
  C2+ SHDN VOUT
  C1+ VCC LTC 1262
  SHUTDOWN* 12V
  60mA + 220nF C1– ® INPUT
  5V 12V …

Модельный ряд

Классификация производителя

• Power Management > Inductorless (Charge Pump) DC/DC Converters > Flash Memory Programming | Regulated Step-Up Charge Pumps

Варианты написания:

LTC1263IS8TRPBF, LTC1263IS8 TRPBF