ADM2461E 500 kbps, 5.7 kV RMS, Signal Isolated Half Duplex RS-485 Transceiver with ±15 kV IEC ESD

Product Details

The ADM2461E/ADM2463E are 500 kbps, 5.7 kV rms, signal isolated RS-485 transceivers that pass radiated emissions testing to the EN55032 Class B standard with margin on a 2-layer printed circuit board (PCB). The ADM2461E/ADM2463E isolation barrier provides robust immunity to noise and system level EMC events. The devices are protected against ≥±12 kV contact and ≥ ±15 kV air IEC61000-4-2 electrostatic discharge (ESD) events on the RS-485 A, B, Y, and Z pins. The devices feature cable invert pins to allow quick correction of the reversed cable connection on the A, B, Y, and Z bus pins while maintaining full receiver fail-safe performance. 

These devices are optimized for low speed over long cable runs and have a maximum data rate of 500 kbps. The high differential output voltage makes these devices suitable for Profibus nodes when powered with 5 V on the V_DD2 supply. The V_DD1 primary supply and V_DD2 isolated supply both support a wide range of voltages (1.7 V to 5.5 V and 3 V to 5.5 V, respectively). Half-duplex and full duplex device options are available in the industry standard 16-lead, wide-body, standard SOIC_W package with >8.0 mm creepage and clearance. 

APPLICATIONS  

• Heating, ventilation, and air conditioning (HVAC) networks
• Industrial field buses
• Building automation
• Utility networks

Features and Benefits

• 5.7 kV rms, signal isolated RS-485/RS-422 transceiver
• Low radiated emissions, passes EN55032 Class B with margin on a 2-layer PCB
• Cable inversion smart feature
  • Correction for reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe
• ESD protection on the RS-485 A, B, Y, and Z bus pins
  • ≥±12 kV IEC61000-4-2 contact discharge
  • ≥±15 kV IEC61000-4-2 air discharge
• Low speed 500 kbps data rate for EMI control
• Flexible power supply inputs
  • Primary V_DD1 supply of 1.7 V to 5.5 V
  • Isolated V_DD2 supply of 3.0 V to 5.5 V

• Profibus^® compliant for 5 V V_DD2
• Wide −40°C to +125°C operating temperature range
• High common-mode transient immunity: >250 kV/μs
• Short-circuit, open-circuit, and floating input receiver fail-safe
• Supports 192 bus nodes (72 kΩ receiver input impedance)
• Full hot swap support (glitch free power-up and 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
• 16-lead, wide body, SOIC_W package with >8.0 mm creepage and clearance in standard pinout