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Design Notes

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  LTC1564: A Digitally Tuned Antialiasing / Reconstruction Filter Simplifies High Performance DSP Design &mdash DN276
  PDF, 90 Kb, File published: Jan 2, 2002
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  LTC1564: A Digitally Tuned Antialiasing/Reconstruction Filter
  Simplifies High Performance DSP Design – Design Note 276
  Max W. Houser and Philip Karantzalis
  Introduction
  Typically an analog antialiasing п¬Ѓlter is used to band-limit
  wideband signals at the input of an analog-to-digital
  converter. In addition, as the converter’s sampling
  rate changes, an antialiasing filter’s passband should
  increase or decrease accordingly. A frequency-tunable
  analog п¬Ѓlter for a high resolution converter requires a
  large number of expensive precision components. With
  the LTCВ®1564, designers of data acquisition instruments
  and digital signal processing (DSP) systems have a low
  noise, continuous-time, “brick wall” lowpass filter with
  digital control of the corner frequency fC, (fC range 10kHz
  to 150kHz in 10kHz steps). The LTC1564 also includes
  a digitally programmable gain amplifier (PGA, 1V/V to
  16V/V in 1V/V steps). A simple, on-chip, latching digital
  interface controls corner frequency and gain settings.
  The LTC1564 is in a small 16-pin SSOP and operates
  from a supply voltage of 2.7V to 10.5V total (single or
  split supplies).
  Filtering Performance and Operation …

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Manufacturer's Classification

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

Other Names:

LTC1608IGPBF, LTC1608IG PBF