Datasheet Linear Technology LTC2450 — Datenblatt

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  Digitize a $1000 Sensor with a $1 Analog-to-Digital Converter &mdash DN456
  PDF, 145 Kb, Datei veröffentlicht: Oct 3, 2008
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  Digitize a $1000 Sensor with a $1 Analog-to-Digital Converter
  Design Note 456
  Mark Thoren
  Introduction
  The LTC2450 is a 16-bit, single-ended input, deltasigma ADC in a 2mm × 2mm DFN package, but don’t
  let its small size and low cost fool you. The LTC2450
  has impressive DC specs, including 2LSB INL, 2LSB
  offset and a 0.01% gain error, making it a perfect match
  for many high-end industrial sensors, as well as a wide
  variety of data acquisition, measurement, control and
  general purpose voltage monitoring applications.
  Digitize an Accurate Sensor with an
  Accurate ADC
  The Setra Model 270 is an exquisitely accurate
  barometric pressure sensor often used in weather
  stations and semiconductor manufacturing. A 600 to
  1100 millibar input range corresponds to a 0V to 5V
  output. Despite its high accuracy, it does not require an
  expensive ADC to take full advantage of this sensor’s
  performance. The LTC2450’s DC specifications are
  more than adequate for the 270’s 0.05% accuracy.
  Figure 1 shows the basic connections, and Figure 2
  shows the change in barometic pressure from walking …

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• Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Single Channel ADCs