Datasheet Linear Technology LTC6078 — Datenblatt

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LTC6079 LTC6079

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  Low Power, DC Accurate Drivers for 18-Bit ADCs &mdash LT Journal
  PDF, 3.4 Mb, Datei veröffentlicht: Jul 9, 2013
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  Low Power, DC Accurate Drivers for 18-Bit ADCs
  Guy Hoover A common misconception about 18-bit SAR ADCs is the only way to drive them
  is with a high powered, high speed, low noise op amp or differential driver whose
  DC performance often leaves much to be desired. It is possible to use a low
  power, DC accurate op amp to drive an 18-bit SAR ADC if the input is a DC or low
  bandwidth AC signal and the op amp outputs are given sufficient time to settle.
  Using the single-ended to differential driver of Figure 1, four different low power
  dual op amps were tested to show the trade-offs in using low power drivers.
  This circuit enables the testing of offset voltage, the maximum sample
  rate for DC and AC signals, noise and
  power consumption. The ADC used
  is the LTC2379-18, a 1.6Msps 18-bit
  SAR ADC with an offset of В±9LSBs, INL of
  В±2LSBs and peak-to-peak noise of 5LSBs.
  The four amplifiers used are the
  LT1013, LTC6078, LTC6081 precision and
  LTC2051HV zero-drift dual op amps—
  Table 1 shows a summary of their major
  specs. The circuit supply voltage is the
  voltage applied to the V+ and V– terminals
  of the op amps. This voltage determines
  the power dissipation of the amplifier and
  its maximum signal swing. The voltages …

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  Power Precision Dual Op Amp Combines the Advantages of Bipolar and CMOS Amplifiers &mdash LT Journal
  PDF, 140 Kb, Datei veröffentlicht: Sep 1, 2005
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  DESIGN FEATURES ВµPower Precision Dual Op Amp
  Combines the Advantages of
  Bipolar and CMOS Amplifiers
  by Cheng-Wei Pei and Hengsheng Liu Introduction
  The LTC6078 and LTC6079 are dual
  and quad micropower, precision op
  amps that combine the low offset and
  drift of traditional bipolar amplifiers
  with the low bias current of CMOS
  amplifiers. Additionally, the LTC6078
  features low supply current and low
  noise, low supply voltage operation,
  and rail-to-rail input and output
  stages. This combination of features
  allows precision performance previously available only through composite
  amplifiers, manual offset trimming, or
  calibration. A Superior Op Amp
  Traditional bipolar op amps can be
  designed for excellent precision over
  temperature, but bipolar amplifiers
  lack the low bias currents of CMOS
  amplifiers. In high source impedance
  applications, a few nanoamps of input …

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• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > Precision Amplifiers (Vos | 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