5.7 kV RMS Isolated, High Working Voltage, RS-485 Transceiver with ±15 kV IEC ESD

The ADM2761E/ADM2763E are 500 kbps, 5.7 kV rms, signal isolated RS-485 transceivers that pass radiated emissions testing to the EN 55032, Class B standard with margin on a 2-layer printed circuit board (PCB). These devices are compliant to the RS-485 and RS-422 communication standards. The ADM2761E/ ADM2763E isolation barrier provides robust system level immunity to IEC 61000-4-x system level electromagnetic compatibility (EMC) standards. The devices are suitable for applications that require insulation against working voltages of 1060 V rms and 1500 V dc for the lifetime of the device.

The devices are protected against ≥±12 kV contact and ≥±15 kV air IEC 61000-4-2 electrostatic discharge (ESD) events on the RS-485 A, B, Y, and Z pins. The ADM2763E features a receiver cable invert pin to allow quick correction of the reversed cable connection on the A and B receiver 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 3.0 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 8.3 mm creepage and clearance.

Applications

* Solar inverters

* Electrical test and measurement

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

* Industrial field buses

* Building automation

* 5.7 kV rms, signal isolated RS-485 transceiver

* 1500 V peak and dc working voltage to DIN V VDE 0884-11

* Low radiated emissions: passes EN 55032, Class B with margin on a 2-layer PCB

* Receiver cable inversion smart feature

* Correction for reversed cable connection on A and B bus pins while maintaining full receiver fail-safe feature

* ESD protection on the RS-485 A, B, Y, and Z bus pins

* ≥ ±12 kV IEC 61000-4-2 contact discharge

* ≥ ±15 kV IEC 61000-4-2 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