Analog Devices Inc. ADM2795E Transceivers

Analog Devices Inc. ADM2795E Transceivers are 5kVrms signal-isolated RS-485 transceivers. The transceivers provide up to ±42V of AC/DC peak bus overvoltage fault protection on the RS-485 bus pins. Developed using iCoupler® technology, the transceivers combine a 3-channel isolator, RS-485 transceiver, and IEC electromagnetic compatibility (EMC) transient protection into a single package.

These Analog Devices RS-485/RS-422 transceivers offer IEC 61000-4-5 Level 4 surge protection, which enables up to ±4kV protection on the RS-485 bus pins. ADM2795E has IEC 61000-4-4 Level 4 EFT protection up to ±2kV and IEC 61000-4-2 Level 4 ESD protection on the bus pins. This protection allows the ADM2795E Transceivers to withstand up to ±15kV on the transceiver interface pins without latching up.

ADM2795E's extended common-mode input range of ±25V improves data communication reliability in noisy environments. The ADM2795E Transceivers operate over wide power supply ranges, using a 1.7V to 5.5V V_DD1 power supply range. This allows the transceivers to interface to low-voltage logic supplies. When operating over a 3V to 5.5V V_DD2 power supply, the ADM2795E transceivers are fully TIA/EIA RS-485/RS-422 compliant.

Features

5kVrms isolated RS-485/RS-422 transceiver
±42V AC/DC peak fault protection on RS-485 bus pins
Certified Level 4 EMC protection on RS-485 A, B bus pins
- IEC 61000-4-5 surge protection (±4kV)
- IEC 61000-4-4 electrical fast transient (EFT) protection (±2kV)
- IEC 61000-4-2 electrostatic discharge (ESD) protection
  - ±8kV contact discharge
  - ±15kV air discharge
- IEC 61000-4-6 conducted radio frequency (RF) immunity (10V/mrms)
Certified IEC 61000-4-x immunity across isolation barrier
IEC 61000-4-2 ESD, IEC 61000-4-4 EFT, IEC 61000-4-5 surge, IEC 61000-4-6 conducted RF immunity, IEC 61000-4-3 radiated immunity, IEC 61000-4-8 magnetic immunity
RS-485 A, B pins human body model (HBM) ESD protection: >±30kV
−25V to +25V common-mode input range
>75kV/μs common-mode transient immunity

Robust noise immunity (tested to the IEC 62132-4 standard)
Passes EN55022 Class B radiated emissions by 6dBμV/m margin
Receiver short-circuit, open-circuit, and floating input fail-safe
Supports 256 bus nodes (96kΩ receiver input impedance)
−40°C to +125°C temperature option
Glitch free power-up/power-down (hot swap)
Safety and regulatory approvals (pending)
- CSA Component Acceptance Notice 5A, DIN V VDE V 0884-10, UL 1577, CQC11-471543-2012
- TIA/EIA RS-485/RS-422 compliant over full supply range
- 3V to 5.5V operating voltage range on V_DD2
- 1.7V to 5.5V operating voltage range on V_DD1 logic supply