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

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 VDD2 supply. The VDD1 primary supply and VDD2 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 SOICW package with >8.0 mm creepage and clearance.

APPLICATIONS

* Heating, ventilation, and air conditioning (HVAC) networks

* Industrial field buses

* Building automation

* Utility networks

* 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 VDD1 supply of 1.7 V to 5.5 V

* Isolated VDD2 supply of 3.0 V to 5.5 V