ADM2895E

RECOMMENDED FOR NEW DESIGNS

5.7kV_RMS Signal and Power Isolated Half-Duplex RS-485 Transceiver with Fault Protection

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $5.50

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Overview

5.7kV_RMS isolated half-duplex RS-485/RS-422 transceiver
±60V fault protection on RS-485 A and B pins
Low radiated emissions, integrated, isolated DC-to-DC converter
Meets EN 55032 Class B radiated emissions on a 2-layer PCB
Robust protection on the RS-485 A and B bus pins
- ≥ ±4kV IEC 61000-4-2 ESD
- ±10kV HBM ESD
- ≥ ±4kV IEC 61000-4-4 EFT
Extended ±25V common-mode range
Two speed options
- ADM2895E - low speed 250kbps for EMI control
- ADM2895E-1 - high speed 20Mbps data rate
Flexible power supplies
- Primary input V_CC supply of 3.0V to 5.5V
- Primary logic V_IO supply of 1.7V to 5.5V
- V_SEL pin to select isolated V_ISO supply of 5V (V_CC> 4.5V) or 3.3V

PROFIBUS compliant for 5V V_ISO
Wide operating temperature range: −40°C to +105°C
High common-mode transient immunity: 250kV/μs
Short-circuit, open-circuit, and floating input receiver fail-safe
Supports >224 bus nodes (112kΩ receiver input impedance)
Full hot-swap support (glitch free power-up/power-down)
Safety and regulatory approvals
- IEC 60747-17 (pending)
- UL 1577 (pending)
  - V_ISO= 5700V_RMS for 1 minute
- IEC/EN/CSA 62368-1 (pending)
- IEC/EN/CSA 61010-1 (pending)
- IEC/CSA 60601-1 (pending)
- GB 4943.1 (pending)
Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E)
Outline Dimensions with 8.3mm creepage and clearance in standard pinout

The ADM2895E/ADM2895E-1 are 5.7k_VRMS signal and power isolated RS-485 transceivers with ±60V fault protection on the RS-485 A and B pins. These devices are designed for balanced transmission lines and comply with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E). The devices can pass radiated emissions testing to the EN 55032 Class B standard with margin on a 2-layer printed circuit board (PCB) with high-frequency decoupling capacitors and two small external 0402 ferrites on isolated power and ground pins. The device features an integrated, low electromagnetic interference (EMI), isolated DC-to-DC converter, which eliminates the need for an external isolated power supply. The isolation barrier provides immunity to system level electromagnetic compatibility (EMC) standards. The devices are suitable for applications that require reinforced insulation against working voltages of 400V_RMS and 566V_DC for the lifetime of the device. The devices are protected against ±4kV contact IEC 61000-4-2 and ±15kV human body model (HBM) electrostatic discharge (ESD) events on the RS-485 A and B pins and ±8kV contact IEC 61000-4-2 ESD across the barrier without latch-up or damage.

The ADM2895E/ADM2895E-1 feature overvoltage protection on the RS-485 A and B pins to withstand up to ±60V DC or AC peak to the transceiver side GND2. This allows for robust protection against transients and accidental connection to ±12V or ±24V power supplies. The common-mode range of the device is extended to ±25V for applications with large ground offsets and long cable runs.

Please see the data sheet for the full description.

APPLICATIONS

Heating, ventilation, and air conditioning (HVAC) networks
Industrial field buses
Building automation
Utility networks
Energy meters

Part Models: 2
1ku List Price: Starting From $5.50

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADM2895EBRNZ	28-Lead SOIC (Wide, Finer Pitch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM2895EBRNZ-RL7	28-Lead SOIC (Wide, Finer Pitch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Evaluation Kits

Evaluating the ADM2895E/ADM2895E-1, 5.7kVRMS Signal and Power Isolated Half-Duplex RS-485 Transceiver with Fault Protection

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Features and Benefits

Simplified evaluation of the ADM2895E/ADM2895E-1 250kbps half-duplex isolated RS-485 transceiver
2-layer PCB compliant to EN 55032 Class B radiated emissions
Footprint for 10mm × 10mm, 28-lead SOIC_FP package with >8.0mm creepage and clearance
On-board ADP7104 LDO regulators with jumper options for simplified evaluation in multiple supply configurations
Flexible, low voltage VIO supply rail for interfacing with I/O nodes as low as 1.7V
Selectable 3.3V or 5V isolated V_ISOOUT supply

IEC 61000-4-2 ESD protection on Pin A and Pin B
- ±4kV contact discharge
SMA connector for TxD input signal
Optional on-board LTC6900 oscillator for providing TxD signal
Screw terminal blocks for connecting power, digital, and RS‑485 signals
Jumper-selectable enable and disable for digital input signals
Resistors and footprints for termination
Test points for measuring all signals

Product Details

The EVAL-ADM2895EEBZ allows simplified, efficient evaluation of the ADM2895E/ADM2895E-1, 5.7kV_RMS, 250kbps (for ADM2895E) half-duplex signal and power isolated RS-485 transceiver. The EVAL-ADM2895EEBZ can also be used to evaluate the higher speed 20Mbps (for ADM2895E-1) by replacing the low-speed part with the higher speed part.

The ADM2895E/ADM2895E-1 features an integrated, isolated, DC-to- DC converter that provides power to the isolated side of the device with no additional ICs required.

The EVAL-ADM2895EEBZ comes with options for the evaluation of the ADM2895E/ADM2895E-1 device in an individual system. Digital and RS-485 bus signals are easily accessible by the screw terminal blocks on the EVAL-ADM2895EEBZ. Each digital input can be configured by the on-board jumper options.

An on-board ADP7104 low dropout (LDO) regulator accepts an input voltage of up to 20V and outputs a range of selectable supply voltages to the V_CC pin, configurable by jumper options. The LDO regulator can be bypassed to power the ADM2895E/ADM2895E-1 V_CC supply pin directly from an external power supply.

Please see the User Guide for the full description.

Resources

UG-2301: Evaluating the ADM2895E/ADM2895E-1, 5.7kV_RMS Signal and Power Isolated Half-Duplex RS-485 Transceiver with Fault Protection (Rev.B)
10/1/2025

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Overview

Documentation

Data Sheet 1

User Guide 1

Safety and Regulatory Compliance 1