Overview
The ADM2865EBRNZ, produced by Analog Devices Inc., is a 5.7 kV rms signal and power isolated RS-485/RS-422 transceiver. This device is part of the ADM2861E, ADM2863E, ADM2865E, and ADM2867E family, designed for balanced transmission lines and compliant with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) standards. It features an integrated, low electromagnetic interference (EMI), isolated dc-to-dc converter, which eliminates the need for an external isolated power supply. The device is suitable for various industrial and commercial applications requiring high isolation and robust communication capabilities.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Isolation Voltage | 5.7 kV rms | |
| ESD Protection | ±12 kV contact, ±15 kV air (IEC61000-4-2) | On RS-485 A, B, Y, and Z pins |
| Data Rate | 25 Mbps (ADM2865E/ADM2867E), 500 kbps (ADM2861E/ADM2863E) | |
| Power Supplies | VCC: 3 V to 5.5 V, VIO: 1.7 V to 5.5 V | |
| VISO Supply | 3.3 V or 5 V (selectable via VSEL pin) | |
| Operating Temperature | −40°C to +105°C | |
| Common-Mode Transient Immunity | 250 kV/µs | |
| Package | 28-lead, fine pitch SOIC_W (10.15 mm × 10.05 mm) | >8.0 mm creepage and clearance |
Key Features
- Integrated, low EMI isolated dc-to-dc converter
- Passes EN 55032 Class B with margin on a 2-layer PCB
- Cable invert smart feature to correct reversed cable connections
- Full receiver fail-safe feature
- High speed data rate of up to 25 Mbps (ADM2865E/ADM2867E)
- Low speed data rate of 500 kbps for EMI control (ADM2861E/ADM2863E)
- Flexible power supplies with VSEL pin for selecting VISO supply
- Wide operating temperature range: −40°C to +105°C
- High common-mode transient immunity: 250 kV/µs
- Short-circuit, open-circuit, and floating input receiver fail-safe
- Full hot swap support (glitch-free power-up/power-down)
- Safety and regulatory approvals (UL 1577, IEC / EN / CSA 62368-1, etc.)
Applications
- Heating, ventilation, and air conditioning (HVAC) networks
- Industrial field buses
- Building automation
- Utility networks
- Energy meters
Q & A
- What is the isolation voltage of the ADM2865EBRNZ?
The isolation voltage is 5.7 kV rms.
- What are the ESD protection levels for the ADM2865EBRNZ?
The device features ±12 kV contact and ±15 kV air ESD protection (IEC61000-4-2) on the RS-485 A, B, Y, and Z pins.
- What are the data rates supported by the ADM2865EBRNZ?
The device supports data rates of up to 25 Mbps (ADM2865E/ADM2867E) and 500 kbps (ADM2861E/ADM2863E) for EMI control.
- What are the power supply requirements for the ADM2865EBRNZ?
The device requires a VCC supply of 3 V to 5.5 V and a VIO supply of 1.7 V to 5.5 V.
- How does the VSEL pin function in the ADM2865EBRNZ?
The VSEL pin allows selection of the VISO supply between 3.3 V and 5 V, depending on the VCC voltage level.
- What is the operating temperature range of the ADM2865EBRNZ?
The device operates over a temperature range of −40°C to +105°C.
- What is the common-mode transient immunity of the ADM2865EBRNZ?
The device has a common-mode transient immunity of 250 kV/µs.
- Does the ADM2865EBRNZ support hot swap operations?
Yes, the device supports full hot swap operations with glitch-free power-up and power-down.
- What safety and regulatory approvals does the ADM2865EBRNZ have?
The device has various safety and regulatory approvals including UL 1577, IEC / EN / CSA 62368-1, and others.
- What package type is the ADM2865EBRNZ available in?
The device is available in a 28-lead, fine pitch SOIC_W package with >8.0 mm creepage and clearance.
