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Notas de Diseño

• Descargar
  12-Bit 3Msps SAR ADC Solves Pipeline Problems &mdash DN192
  PDF, 125 Kb, Archivo publicado: oct 2, 1998
  Extracto del documento

  advertisement 12-Bit 3Msps SAR ADC Solves Pipeline Problems
  Design Note 192
  Dave Thomas and Kevin R. Hoskins
  A new 12-bit 3Msps ADC brings unparalleled levels of
  performance and ease of use to the high speed ADC user.
  Its successive approximation (SAR) method eliminates
  many problems found in pipelined and subranging ADCs in
  that speed range. This note describes these problems and
  introduces a new, simple-to-use alternative, the LTCВ®1412.
  The LTC1412 offers an ideal combination of speed, performance and size. Some of its features and benefits include: Complete low power 12-bit 3Msps ADC Great AC performance: 72.5dB SINAD and 83dB SFDR at
  Nyquist Great DC performance: В±0.25LSB typical INL and DNL
  (В±1LSB max) Three-state output bus with no pipeline delay (parallel
  I/O with DSP interface signals) Tiny 28-lead SSOP package
  PIPELINE PROBLEMS
  Pipelined ADCs are great for giving the fastest speed short
  of that provided by a full-flash converter. In fact, LTC
  manufactures both pipelined and subranging ADCs. However, at resolutions of 12 bits and higher, these architectures can have a number of fundamental drawbacks.
  These drawbacks include poor noise and SNR, complex
  reference circuitry, complicated input circuitry, pipeline
  latency and poor frequency domain performance. These
  parts have large package size and high power dissipation.
  They also lack three-state outputs.
  THE LTC1412 BENEFITS …

Artículos

• Descargar
  Eliminate Pipeline Headaches with New 12-Bit 3Msps SAR ADC &mdash LT Journal
  PDF, 250 Kb, Archivo publicado: agosto 1, 1998
  Extracto del documento

  DESIGN FEATURES Eliminate Pipeline Headaches
  with New 12-Bit 3Msps SAR ADC
  by Dave Thomas and
  William C. Rempfer
  Headache #1:
  A new 12-bit 3Msps ADC brings Unpredictable Behavior
  new levels of performance and ease of
  use to high speed ADC applications.
  By raising the speed of the successive
  approximation (SAR) method to
  3Msps, it eliminates the many drawbacks of pipelined and subranging
  ADCs in that speed range. It is the
  first clean, simple to use alternative
  to pipelined ADCs for applications up
  to 3Msps.
  The LTC1412 is an ultrafast SAR
  ADC that offers an ideal combination
  of performance, size and cost. Some
  of its features include:
  вќЏ Complete low power 12-Bit
  3Msps ADC
  вќЏ Great AC performance: 72.2dB
  SINAD and –80dB THD at …

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Clasificación del fabricante

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