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  Generating a В±10.24V True Bipolar Input for an 18-Bit, 1Msps SAR ADC &mdash DN522
  PDF, 452 Kb, File published: Nov 26, 2013
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  Generating a В±10.24V True Bipolar Input for an 18-Bit, 1Msps
  SAR ADC
  Design Note 522
  Guy Hoover
  Introduction
  The LTC В®2338 is an 18-bit fully differential SAR ADC
  that is remarkably easy to drive. This 1Msps ADC operates from a single 5V supply and achieves В±4LSB INL
  maximum with –111dB THD and 100dB SNR. Its fully
  differential В±20.48V true bipolar input range minimizes
  the need for range scaling, and its 2kО© resistive input
  greatly reduces the charge kickback from the internal
  sampling capacitor.
  ADCs claiming similar performance require scaling
  to exceed what is typically a 0V to VREF input range,
  resulting in low impedance inputs or an additional
  buffer stage requirement. To band limit noise and
  minimize disturbances reflected into the buffer from
  sampling transients, other ADCs require filter circuitry
  composed of expensive film or C0G capacitors at the
  driver output. In contrast, the simple driver circuit
  presented here requires only a dual precision op amp
  and two resistors to drive the LTC2338-18. Layout
  strategies for this circuit are also shown. C59 …

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Manufacturer's Classification

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

Other Names:

LT1469IS8-2PBF, LT1469IS8-2 PBF, LT1469IS82#PBF, LT1469IS8 2#PBF