Overview
The ADM2795EBRWZ-RL7, produced by Analog Devices Inc., is a 5 kV rms signal isolated RS-485 transceiver. This device integrates Analog Devices' iCoupler® technology, combining a 3-channel isolator, an RS-485 transceiver, and IEC electromagnetic compatibility (EMC) transient protection in a single package. It is designed to provide robust protection and reliability in various industrial and commercial applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VDD1) | 1.7 | 5.5 | V | ||
| Operating Voltage Range (VDD2) | 3 | 5.5 | V | ||
| Common-Mode Input Range | -25 | 25 | V | ||
| Common-Mode Transient Immunity | 75 | 125 | kV/μs | VCM ≥ 1 kV, transient magnitude ≥ 800 V | |
| Surge Protection (IEC 61000-4-5) | ±4 kV | On RS-485 bus pins (A and B) | |||
| EFT Protection (IEC 61000-4-4) | ±2 kV | Level 4 | |||
| ESD Protection (IEC 61000-4-2) | ±15 kV | On transceiver interface pins | |||
| Temperature Range | -40 | 125 | °C | ||
| Package Type | 16-lead SOIC-W | ||||
| Data Rate | 2.5 Mbps | ||||
| Receiver Input Impedance | 96 kΩ | Supports up to 256 bus nodes |
Key Features
- Fully TIA/EIA RS-485/RS-422 compliant when operated over a 3 V to 5.5 V VDD2 power supply.
- Up to ±42 V of AC/DC peak bus overvoltage fault protection on the RS-485 bus pins.
- IEC 61000-4-5 Level 4 surge protection up to ±4 kV on the RS-485 bus pins.
- IEC 61000-4-4 Level 4 EFT protection up to ±2 kV and IEC 61000-4-2 Level 4 ESD protection up to ±15 kV on the bus pins.
- Robust noise immunity tested to the IEC 62132-4 standard.
- Passes EN55022 Class B radiated emissions by a 6 dBµV/m margin.
- Receiver short-circuit, open-circuit, and floating input fail-safe.
- Supports 256 bus nodes with 96 kΩ receiver input impedance.
- Glitch-free power-up/power-down (hot swap) capability.
- Operating temperature range from -40°C to +125°C.
Applications
- Heating, ventilation, and air conditioning (HVAC) networks.
- Industrial field buses.
- Building automation.
- Utility networks.
Q & A
- What is the operating voltage range for the ADM2795E?
The ADM2795E operates over a voltage range of 1.7 V to 5.5 V for VDD1 and 3 V to 5.5 V for VDD2.
- What level of surge protection does the ADM2795E offer?
The ADM2795E offers IEC 61000-4-5 Level 4 surge protection up to ±4 kV on the RS-485 bus pins.
- What is the common-mode input range of the ADM2795E?
The common-mode input range is -25 V to +25 V.
- How many bus nodes does the ADM2795E support?
The device supports up to 256 bus nodes with a receiver input impedance of 96 kΩ.
- What is the temperature range for the ADM2795E?
The operating temperature range is from -40°C to +125°C.
- Does the ADM2795E have built-in ESD protection?
Yes, the device has IEC 61000-4-2 Level 4 ESD protection up to ±15 kV on the transceiver interface pins.
- Is the ADM2795E compliant with TIA/EIA RS-485/RS-422 standards?
Yes, the device is fully TIA/EIA RS-485/RS-422 compliant when operated over a 3 V to 5.5 V VDD2 power supply.
- What kind of noise immunity does the ADM2795E have?
The device has robust noise immunity tested to the IEC 62132-4 standard.
- Does the ADM2795E support hot swap operations?
Yes, the device has glitch-free power-up/power-down (hot swap) capability.
- What is the package type of the ADM2795E?
The device is packaged in a 16-lead SOIC-W package.
