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LTC2050

Design Notes

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  Op Amp Selection Guide for Optimum Noise Performance &mdash DN355
  PDF, 92 Kb, File published: Jan 7, 2005
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  Op Amp Selection Guide for Optimum Noise Performance
  Design Note 355
  Glen Brisebois
  Introduction
  Linear Technology continues to add to its portfolio of
  low noise op amps. This is not because the physics of
  noise has changed, but because low noise specifications are being combined with new features such as
  rail-to-rail operation, shutdown, low voltage and low
  power operation. Op amp noise is dependent on input
  stage operating current, device type (bipolar or FET)
  and input circuitry.This selection guide is intended to
  help you identify basic noise tradeoffs and select the
  best op amps, new or old, for your application.
  Quantifying Resistor Thermal
  Noise and Op Amp Noise
  The key to understanding noise tradeoffs is the fact that
  resistors have noise. At room temperature, a resistor
  R has an RMS voltage noise density (or “spot noise”)
  of VR = 0.13в€љR noise in nV/в€љHz. So a 10k resistor has
  13nV/в€љHz and a 1M resistor has 130nV/в€љHz. Rigorously
  speaking, the noise density is given by the equation
  VR = √4kTR, where k is Boltzman’s constant and T is
  the temperature in degrees Kelvin. This dependency …

Articles

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  LTC2050, Zero-Drift Operational Amplifier in SOT-23 Package Minimizes Board Area without Compromising Specs &mdash LT Journal
  PDF, 169 Kb, File published: Feb 1, 2000
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  DESIGN INFORMATION LTC2050, Zero-Drift Operational
  Amplifier in SOT-23 Package
  Minimizes Board Area without
  Compromising Specs
  by David Hutchinson
  Introduction Extended Input Common
  Mode Range with
  Uncompromising CMRR
  At room temperature, with the input
  common mode level at mid-supplies,
  the LTC2050 typically has 0.5ВµV of
  input-referred offset (input-referred
  offset is guaranteed to be less than
  В±3ВµV). To ensure this DC accuracy
  over the common mode input range,
  the LTC2050 has exceptionally high
  34 Rail-to-Rail Output Drive
  with a 1k Load
  The LTC2050 maintains its DC characteristics while driving resistive loads
  requiring source or sink current as
  high as 5mA with a 3V or 5V supply.
  Figure 3 shows the op amp rail-to-rail
  swing versus output resistance loading. With a 1k or 5k load, the output …

• Download
  Zero-Drift Operational Amplifier Family in Small-Footprint Packages Features 3µV Maximum DC Offset and30nV/°C Maximum Drift &mdash LT Journal
  PDF, 186 Kb, File published: Nov 1, 2000
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  DESIGN FEATURES Zero-Drift Operational Amplifier Family
  in Small-Footprint Packages Features
  3ВµV Maximum DC Offset and
  30nV/В°C Maximum Drift
  by David Hutchinson
  Introduction Extended Input
  Common Mode Range
  with Uncompromising CMRR
  At room temperature, and with the
  input common mode level at midsupplies, the parts typically have
  0.5ВµV of input-referred offset and are
  guaranteed to have less than В±3ВµV.
  To ensure this DC accuracy over the
  common mode input range, the
  LTC2050/LTC2051/LTC2052 have 6 exceptionally high CMRR over a wide
  range from the negative supply to
  typically within 0.9V of the positive
  rail, as shown in Figure 1. For
  example, as the input is varied over
  the entire 5V common mode range,
  the input-referred offset changes typically by less than 0.4ВµV. Similar levels
  of PSRR (typically less than 0.1ВµV of
  offset per volt of supply change) and …

Model Line

Manufacturer's Classification

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > Precision Amplifiers (Vos | Zero-Drift Amplifiers | Low Power Amplifiers (Is < 1mA/amp) | Low Bias Current Amplifiers (Ib < 100pA) | Rail-to-Rail Amplifiers
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Amplifiers