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LTC1518

Design Notes

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  Precision Receiver Delay Improves Data Transmission &mdash DN129
  PDF, 106 Кб, Файл опубликован: 1 июн 1996
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  Precision Receiver Delay Improves Data Transmission
  Design Note 129
  Victor Fleury
  Moving data from one board to another over a backplane
  places stringent requirements on channel-to-channel
  and part-to-part skew and delay. The propagation delay
  of typical CMOS line receivers can vary as much as
  500% over process and temperature. In high speed
  synchronous systems where clock and data signal
  timing are critical, transmission rates must often be
  reduced to minimize the effects of propagation delay
  and skew uncertainties in the receiver. The LTC В®1518/
  LTC1519/LTC1520 family of high speed line receivers solves this problem, reducing propagation delay
  changes to less than В±17% over production variations
  and temperature, a better than 10 times improvement
  over previous solutions.
  The LTC1518/LTC1519/LTC1520 family of 50Mbps quad
  line receivers translate differential input signals into
  CMOS/TTL output logic levels. The receivers employ
  a unique architecture that guarantees excellent performance over process and temperature with propagation
  delay of 18ns В±3ns. The architecture affords low same
  channel skew (|tPHL -tPLH| 500ps typ), and low channelto-channel propagation delay variation (400ps typ). The
  propagation delay and skew performance are unmatched …

Статьи

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  Tiny 12-Bit ADC Delivers 2.2Msps Through 3-Wire Serial Interface &mdash LT Journal
  PDF, 184 Кб, Файл опубликован: 1 фев 2000
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  DESIGN FEATURES Tiny 12-Bit ADC Delivers 2.2Msps
  Through 3-Wire Serial Interface
  by Joe Sousa
  Introduction
  Serial interfaces occupy little routing
  space, but usually limit the speed of
  an ADC. The LTC1402 has a full
  conversion speed of 2.2Msps and a
  very compact 3-wire interface for connecting to DSPs and microprocessors
  without glue logic. It comes in a 16-pin
  narrow SSOP package. This minuscule package (200mil Г— 230mil
  footprint) and compact serial interface are easy to fit close to sensors to
  best preserve analog signal integrity.
  Other serial 12-bit ADCs have
  sample rates limited to hundreds of
  kilosamples-per-second, which limits
  their utility in high speed data acquisition systems. This slow sample rate,
  combined with poor distortion characteristics, makes them unsuitable
  for tracking high frequency signals.
  The LTC1402 will capture, in less
  than 60ns, the fast steps from an
  external analog input multiplexer for
  high speed data acquisition and it will …

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• Interface > RS485/RS422 Transceivers