ADM2795E Robust 5 kV RMS Isolated RS-485/RS-422 Transceiver with Level 4 EMC and Full ±42 V Protection
Product Details
The ADM2795E is a 5 kV rms signal isolated RS-485 transceiver that features up to ±42 V of ac/dc peak bus overvoltage fault protection on the RS-485 bus pins. The device integrates Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, RS-485 transceiver, and IEC electromagnetic compatibility (EMC) transient protection in a single package. The ADM2795E is a RS-485/RS-422 transceiver that integrates IEC 61000-4-5 Level 4 surge protection, allowing up to ±4 kV protection on the RS-485 bus pins (A and B). The device has IEC 61000-4-4 Level 4 EFT protection up to ±2 kV and IEC 61000-4-2 Level 4 ESD protection on the bus pins, allowing this device to withstand up to ±15 kV on the transceiver interface pins without latching up. This device has an extended common-mode input range of ±25 V to improve data communication reliability in noisy environments. The ADM2795E is capable of operating over wide power supply ranges, with a 1.7 V to 5.5 V VDD1 power supply range, allowing interfacing to low voltage logic supplies. The ADM2795E is also fully TIA/EIA RS-485/RS-422 compliant when operated over a 3 V to 5.5 V VDD2 power supply. The device is fully characterized over an extended operating temperature range of −40°C to +125°C, and is available in a 16-lead, wide-body SOIC package.
Applications
- Heating, ventilation, and air conditioning (HVAC) networks
- Industrial field buses
- Building automation
- Utility networks
Features and Benefits
- 5 kV rms isolated RS-485/RS-422 transceiver
- ±42 V 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 (±4 kV)
- IEC 61000-4-4 electrical fast transient (EFT) protection (±2 kV)
- IEC 61000-4-2 electrostatic discharge (ESD) protection
- ±8 kV contact discharge
- ±15 kV air discharge
- IEC 61000-4-6 conducted radio frequency (RF) immunity (10 V/m rms)
- 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: >±30 kV
- 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
- 3 V to 5.5 V operating voltage range on VDD2
- 1.7 V to 5.5 V operating voltage range on VDD1 logic supply
- Common-mode input range of −25 V to +25 V
- High common-mode transient immunity: >75 kV/μs
- Robust noise immunity (tested to the IEC 62132-4 standard)
- Passes EN55022 Class B radiated emissions by 6 dBμV/m margin
- Receiver short-circuit, open-circuit, and floating input fail-safe
- Supports 256 bus nodes (96 kΩ receiver input impedance)
- −40°C to +125°C temperature option
- Glitch free power-up/power-down (hot swap)
ADM2795E-EP supports defense and aerospace applications (AQEC standard)
- Download ADM2795E-EP data sheet (pdf)
- Military −55°C to +125°C temperature range
- Controlled manufacturing baseline
- 1 assembly/test site
- Enhanced product change notification
- Qualification data available on request
- V62/17611 DSCC Drawing Number