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  RS485 Transceivers Reduce Power and EMI &mdash DN102
  PDF, 80 Kb, Datei veröffentlicht: Apr 1, 1995
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  RS485 Transceivers Reduce Power and EMI – Design Note 102
  Dave Dwelley, Teo Yang Long, Yau Khai Cheong and Bob Reay
  Recent innovations in process and circuit design have
  enabled the release of three new RS485 transceivers:
  the LTC В®1481, LTC1483 and LTC1487. These devices
  share an improved receiver circuit which features 80ОјA
  quiescent current operation (driver disabled) with no
  loss in AC performance relative to standard RS485
  devices, and a new 1ОјA shutdown mode (Figure 1). All
  three new devices are pin compatible with the industry
  standard LTC485 pinout, and feature Linear Technology’s exclusive ±10kV ESD protection (Human Body
  Model) at the line I/O pins, eliminating the need for
  external ESD protection in most cases. LTC1483
  The LTC1483 is a reduced EMI version of the LTC1481
  intended for use in systems where electromagnetic
  interference concerns take precedence over high data
  rates. The LTC1483 driver slew rate is deliberately limited
  to reduce the high frequency electromagnetic emissions
  (Figures 2a and 2b) while improving signal п¬Ѓdelity by
  reducing reflections due to misterminated cables. The
  maximum operating frequency of the LTC1483 driver is
  limited to 250kbaud. All other performance parameters
  are unchanged from the LTC1481, including the low …

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• Interface > RS485/RS422 Transceivers

Andere Namen:

LTC1487CN8PBF, LTC1487CN8 PBF