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Analog Devices ADM2867E Isolated RS-485 Transceiver

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Analog Devices ADM2867E Isolated RS-485 Transceivers are a 5.7kVrms signal and power isolated RS-485 transceivers. The devices pass radiated emissions testing to the EN55032 Class B standard with margin on a 2-layer printed circuit board (PCB) using two small external 0402 ferrites on isolated power and ground pins. The device features an integrated, low electromagnetic interference (EMI), isolated dc-to-dc converter, which eliminates the need for an external isolated power supply. The isolation barrier provides immunity to system-level electromagnetic compatibility (EMC) standards. The family of isolator devices features ±12kV contact and ±15kV air IEC61000-4-2 ESD protection on the RS-485 A, B, Y, and Z pins. The devices also feature cable invert pins, allowing the user to quickly correct reversed cable connection on the A, B, Y, and Z bus pins while maintaining full receiver fail-safe performance.

  • 5.7kVrms isolated RS-485/RS-422 transceiver
  • Low radiated emissions, integrated, isolated DC-to-DC converter
  • Passes EN55032 Class B with margin on a 2-layer PCB
  • Cable invert smart feature
    • Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature
  • ESD protection on RS-485 A, B, Y, and Z pins
    • ≥±12kV IEC61000-4-2 contact discharge
    • ≥±15kV IEC61000-4-2 air discharge
  • High speed 25Mbps data rate (ADM2865E/ADM2867E)
  • Low-speed 500kbps data rate for EMI control (ADM2861E/ADM2863E)
  • Flexible power supplies
    • Input VCC supply of 3V to 5.5V
    • Logic VIO supply of 1.7V to 5.5V
    • VSEL pin to select VISO supply of 5V (VCC > 4.5V) or 3.3V
  • PROFIBUS compliant for 5V VISO
  • −40°C to +105°C wide operating temperature range
  • High common-mode transient immunity: 250kV/μs
  • Short-circuit, open-circuit, and floating input receiver fail-safe
  • Supports 196 bus nodes (72kΩ receiver input impedance)
  • Full hot-swap support (glitch-free power-up/power-down)
  • Safety and regulatory approvals (pending)
  • CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1
  • 28-lead, fine pitch SOIC_W package (10.15mm × 10.05mm) with >8.0mm creepage and clearance

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