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LTC6082 LTC6082

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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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• 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

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LTC6081IDDPBF, LTC6081IDD PBF