Overview
The ADM2795EARWZ from Analog Devices Inc. is a robust, 5 kV rms signal isolated RS-485/RS-422 transceiver. This device integrates Analog Devices' iCoupler® technology, combining a 3-channel isolator, RS-485 transceiver, and IEC electromagnetic compatibility (EMC) transient protection in a single package. It is fully TIA/EIA RS-485/RS-422 compliant and operates over a wide power supply range, making it suitable for various industrial and commercial applications. The transceiver features high common-mode transient immunity, robust noise immunity, and extensive overvoltage fault protection, ensuring reliable data communication in noisy environments.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | ADM2795EARWZ |
| Package Type | 16-lead Wide-Body SOIC |
| Operating Voltage Range (VDD1) | 1.7 V to 5.5 V |
| Operating Voltage Range (VDD2) | 3 V to 5.5 V |
| Data Rate | Up to 2.5 Mbps |
| Temperature Range | -40°C to +85°C (or +125°C option) |
| Common-Mode Input Range | -25 V to +25 V |
| Bus Overvoltage Fault Protection | Up to ±42 V ac/dc peak |
| ESD Protection | Up to ±15 kV (Air Gap), ±8 kV (Contact), ±4 kV (HBM) |
| Surge Protection | Up to ±4 kV (IEC 61000-4-5 Level 4) |
| Number of Bus Nodes Supported | 256 |
Key Features
- Fully TIA/EIA RS-485/RS-422 compliant
- 5 kV rms signal isolation using iCoupler technology
- High common-mode transient immunity (>75 kV/μs)
- Robust noise immunity (tested to IEC 62132-4 standard)
- Receiver short-circuit, open-circuit, and floating input fail-safe
- Glitch-free power-up/power-down (hot swap)
- IEC 61000-4-6 conducted RF immunity (10V/m rms)
- Passes EN55022 Class B radiated emissions by 6 dBµV/m margin
- Supports up to 256 bus nodes (96 kΩ receiver input impedance)
Applications
- Heating, ventilation, and air conditioning (HVAC) networks
- Industrial field buses
- Building automation
- Utility networks
Q & A
- What is the primary function of the ADM2795EARWZ?
The ADM2795EARWZ is a 5 kV rms signal isolated RS-485/RS-422 transceiver, integrating a 3-channel isolator and IEC EMC transient protection.
- What is the operating voltage range for VDD1 and VDD2?
VDD1 operates from 1.7 V to 5.5 V, and VDD2 operates from 3 V to 5.5 V.
- What is the maximum data rate supported by the ADM2795EARWZ?
The device supports data rates up to 2.5 Mbps.
- What is the temperature range for the ADM2795EARWZ?
The device operates over a temperature range of -40°C to +85°C (or +125°C option).
- What level of bus overvoltage fault protection does the ADM2795EARWZ offer?
The device offers up to ±42 V ac/dc peak bus overvoltage fault protection.
- How many bus nodes can the ADM2795EARWZ support?
The device supports up to 256 bus nodes.
- What kind of ESD protection does the ADM2795EARWZ have?
The device has ESD protection up to ±15 kV (Air Gap), ±8 kV (Contact), and ±4 kV (HBM).
- Is the ADM2795EARWZ compliant with TIA/EIA RS-485/RS-422 standards?
Yes, the device is fully TIA/EIA RS-485/RS-422 compliant.
- What are some common applications for the ADM2795EARWZ?
Common applications include HVAC networks, industrial field buses, building automation, and utility networks.
- What package type is the ADM2795EARWZ available in?
The device is available in a 16-lead wide-body SOIC package.
