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LT1362 LT1362

Notas de Diseño

• Descargar
  C-Load TM Op Amps Conquer Instabilities &mdash DN107
  PDF, 495 Kb, Archivo publicado: jul 1, 1995
  Extracto del documento

  C-Load Op Amps Conquer Instabilities – Design Note 107
  Kevin R. Hoskins
  Introduction
  Linear Technology Corporation has taken advantage of
  advances in process technology and circuit innovations
  to create a series of C-Loadв„ў operational amplifiers that
  are tolerant of capacitive loading, including the ultimate,
  amplifiers that remain stable driving any capacitive load.
  This series of amplifiers has a bandwidth that ranges from
  160kHz to 140MHz. These amplifiers are appropriate for
  a wide range of applications from coaxial cable drivers to
  analog-to-digital converter (ADC) input buffer/amplifiers.
  Driving ADCs
  Most contemporary ADCs incorporate a sample-and-hold
  (S/H). A typical S/H circuit is shown in Figure 1. The hold
  capacitor’s (C1) size varies with the ADC’s resolution but
  is generally in the range of 5pF to 20pF, 10pF to 30pF and
  10pF to 50pF for 8-, 10-and 12-bit ADCs, respectively. gracefully and accurately drive capacitive loads, such as
  Linear Technology’s C-Load line of monolithic amplifiers.
  Table 1 lists Linear Technology’s unconditionally stable
  voltage feedback C-Load amplifiers. Table 2 lists other
  voltage feedback C-Load amplifiers that are stable with
  loads up to 10,000pF. …

• Descargar
  C-Load TM Op Amps Tame Instabilities &mdash DN83
  PDF, 929 Kb, Archivo publicado: jun 1, 1994
  Extracto del documento

  C-Load Op Amps Tame Instabilities – Design Note 83
  Richard Markell, George Feliz and William Jett
  Introduction
  By taking advantage of advances in process technology
  and innovative circuit design, Linear Technology Corporation has developed a series of C-Loadв„ў op amps which
  are tolerant of capacitive loading, including the ultimate,
  amplifiers which are stable with any capacitive load. These
  amplifiers span a range of bandwidths from 1MHz to
  140MHz. They are suited for a wide range of applications
  from coaxial cable drivers to capacitive transducer exciters.
  The Problem
  The cause of the capacitive load stability problem in most
  amplifiers is the pole formed by the load capacitance and
  the open-loop output impedance of the amplifier. This
  output pole increases the phase lag around the loop which
  reduces the phase margin of the amplifier. If the phase
  lag is great enough the amplifier will oscillate.
  External networks can be used to improve the amplifier’s
  stability with a capacitive load but have serious drawbacks.
  For instance, most designers are familiar with the use of
  a series resistor RS between the load and the amplifier
  output. The optimum value of RS depends on the load
  capacitance, so this approach isn’t useful for ill-defined …

Artículos

• Descargar
  ADSL Line Driver/Receiver Design Guide, Part 1 &mdash LT Journal
  PDF, 190 Kb, Archivo publicado: feb 1, 2000
  Extracto del documento

  DESIGN IDEAS ADSL Line Driver/Receiver
  Design Guide, Part 1 by Tim Regan Introduction
  Consumer desire for faster Internet
  access is driving the demand for very
  high data rate modems. A digital subscriber line (DSL) implementation
  speeds data to and from remote servers with data rates of 512Kbps to
  8Mbps, much faster than current
  56Kbps modem alternatives. This
  speed of data communication is providing the Internet with the capability
  to transfer information in new formats such as full-motion video, while greatly improving the timeliness of
  conventional information access.
  One very important feature of DSL
  technology is that the connection is
  handled through a normal telephone
  line; therefore, no special high speed
  cables or fiber optic links are required
  and every home and office is most
  likely DSL ready. Another feature is
  that the data interface can operate
  simultaneously with normal voice
  communication over the same tele-phone line. This allows the modem to
  be connected at all times and not
  interfere with the use of the same line …

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