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LTC2444 LTC2444 LTC2445 LTC2445 LTC2448 LTC2448

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  True Rail-to-Rail, High Input Impedance ADC Simplifies Precision Measurements &mdash DN400
  PDF, 150 Kb, Archivo publicado: oct 4, 2006
  Extracto del documento

  advertisement True Rail-to-Rail, High Input Impedance ADC Simplifies
  Precision Measurements – Design Note 400
  Mark Thoren
  Introduction
  High input impedance and a wide input range are two
  highly desirable features in a precision analog-to-digital
  converter, and the LTCВ®2449 delta-sigma ADC has both.
  With just a few external components, the LTC2449 forms
  an exceptional measurement system with very high input
  impedance and an input range that extends 300mV beyond
  the supply rails.
  A designer may trade off the LTC2449’s 200nV resolution
  for faster conversion rates, but otherwise the LTC2449
  requires few to no performance tradeoffs. It simultaneously achieves 1ppm linearity (Figure 2), 200nV input
  resolution and a 5V input span. Ten п¬Ѓlter oversample
  ratios are available, providing data rates from 6.8 samples
  per second to 3500 samples per second. Normal mode
  rejection of 50Hz and 60Hz is better than 87dB in the 6.8sps
  mode. All DC specifications hold for all speeds—only the
  resolution changes. Such persistent high performance
  simplifies the design of otherwise challenging applications, such as 6-digit voltmeters, sensor interfaces, and industrial control. In addition, the LTC2449 digital
  interface and timing are extremely simple, and the No
  Latency architecture eliminates concerns about п¬Ѓlter …

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Clasificación del fabricante

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

Otros nombres:

LTC2449IUHFTRPBF, LTC2449IUHF TRPBF