ADM2865E

RECOMMENDED FOR NEW DESIGNS

ADM2865E

5.7 kV RMS Signal and Power Isolated RS-485 Transceiver with ±15 kV IEC ESD

RECOMMENDED FOR NEW DESIGNS

RECOMMENDED FOR NEW DESIGNS

ADM2861E/ADM2865E Functional Block Diagram slide

ADM2861E/ADM2865E Pin Configuration slide

ADM2861E/ADM2865E Functional Block Diagram

ADM2861E/ADM2865E Pin Configuration

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Features

5.7 kV rms isolated RS-485/RS-422 transceiver
Low radiated emissions, integrated, isolated dc-to-dc converter
Passes EN 55032 Class B with margin on a 2-layer PCB
Cable invert smart feature
- Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature
ESD protection on RS-485 A, B, Y, and Z pins
- ≥±12 kV IEC61000-4-2 contact discharge
- ≥±15 kV IEC61000-4-2 air discharge
High speed 25 Mbps data rate (ADM2865E/ADM2867E)
Low speed 500 kbps data rate for EMI control (ADM2861E/ADM2863E)
Flexible power supplies
- Input V_CC supply of 3 V to 5.5 V
- Logic V_IO supply of 1.7 V to 5.5 V
- V_SEL pin to select V_ISO supply of 5 V (V_CC > 4.5 V) or 3.3 V

PROFIBUS compliant for 5 V V_ISO
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
Supports 192 bus nodes (72 kΩ receiver input impedance)
Full hot swap support (glitch free power-up/power-down)
Safety and regulatory approvals (pending)
UL 1577
- VISO = 5700 V_rms for 1 minute
IEC / EN / CSA 62368-1
IEC / CSA 60601-1
IEC / CSA 61010-1
CQC GB4943.1
DIN EN IEC 60747-17 (VDE 0884-17) (pending)
- V_IORM = 565 V_peak
28-lead, fine pitch SOIC_W package (10.15 mm × 10.05 mm) with >8.0 mm creepage and clearance

Additional Details

The ADM2861E, ADM2863E, ADM2865E, and ADM2867E are 5.7 kV rms signal and power isolated RS-485 transceivers. These devices are designed for balanced transmission lines and comply with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E). The devices pass radiated emissions testing to the EN 55032 Class B standard with margin on a 2-layer printed circuit board (PCB) using 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 family of isolator devices features ±12 kV contact and ±15 kV air IEC61000-4-2 ESD protection on the RS-485 A, B, Y, and Z pins. The devices also features cable invert pins, allowing the user to quickly correct reversed cable connection on the A, B, Y, and Z bus pins while maintaining full receiver fail-safe performance.

Slew rate limited versions are available, which are optimized for low speed over long cable runs, and have a maximum data rate of 500 kbps. Half duplex and full duplex variants are available. The full duplex generics allow independent cable inversion of the driver and receiver for additional flexibility.

Applications

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

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Support

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Visit the ADI Support Page

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FAQs

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Part Models 2

1ku List Price Starting From $6.84

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Technical Documents 3

ADM2867E/ADM2865E/ADM2863E/ADM2861E: 5.7 kV RMS Signal and Power Isolated RS-485 Transceiver with ±15 kV IEC ESD Data Sheet (Rev.C) 10/21/2024

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UG-1725: Evaluating the 3 kV RMS ADM2565E and the 5.7 kV RMS ADM2865E, Signal and Power Isolated, RS-485 Transceivers with ±15 kV IEC ESD (Rev.0) 10/13/2020

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Safety and Regulatory Compliance Information 01/28/2016

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Reference Materials 4

Digital Isolation and Interface Technology Selection Guide 02/07/2020

Safety and Regulatory Compliance Information 01/28/2016

Video

2

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Video

2020-10-22

03:05

ADI: Low EMI Isolated RS-485 for Your Energy and Solar Applications

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2020-12-01

03:56

Compact and Quiet: A Tiny Electrification Solution

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Design Resources 2

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
ADM2865EBRNZ	28-Lead SOIC (Wide, Finer Pitch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADM2865EBRNZ-RL7	28-Lead SOIC (Wide, Finer Pitch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

ADM2865EBRNZ
Pin/Package Drawing
28-Lead SOIC (Wide, Finer Pitch)
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADM2865EBRNZ-RL7
Pin/Package Drawing
28-Lead SOIC (Wide, Finer Pitch)
Documentation

HTML Material Declaration

external-link

HTML Reliablity Data

external-link

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

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Ultra Low Power Microcontrollers1
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reference details image

EVAL-ADM2865E

Evaluating the 5.7 kV RMS ADM2865E Signal and Power Isolated, RS-485 Transceivers with ±15 kV IEC ESD

ADM2865E Evaluation Board - Angle View

ADM2865E Evaluation Board - Top View

ADM2865E Evaluation Board - Bottom View

Evaluating the 5.7 kV RMS ADM2865E Signal and Power Isolated, RS-485 Transceivers with ±15 kV IEC ESD

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ADM2865E Evaluation Board - Angle View

ADM2865E Evaluation Board - Top View

ADM2865E Evaluation Board - Bottom View

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ADM2865E Evaluation Board - Top View

ADM2865E Evaluation Board - Bottom View

EVAL-ADM2865E

Evaluating the 5.7 kV RMS ADM2865E Signal and Power Isolated, RS-485 Transceivers with ±15 kV IEC ESD

Features and Benefits

Simplified evaluation of the ADM2865E

25 Mbps half-duplex, isolated RS-485 transceivers

2-layer PCB compliant to EN 55032/CISPR 32 Class B radiated emissions
Footprint for 10.15 mm × 10.05 mm, 28-lead SOIC_W_FP package with 8.3 mm creepage and clearance
On-board ADP7104 LDO regulator with jumper options for simplified evaluation in 5 V or 3.3 V configuration
Flexible, low voltage VIO supply rail for interfacing with I/O nodes as low as 1.7 V
Selectable 3.3 V or 5 V isolated supply voltage options available
ESD protection on the RS-485 A and B pins

≥±12 kV IEC 61000-4-2 contact discharge
≥±15 kV IEC 61000-4-2 air discharge

SMA connector for high speed 25 Mbps 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 loopback test and termination
Test points for measuring all signals

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Product Detail

The EVAL-ADM2865EEBZ allow the simplified, efficient evaluation of the 5.7 kV rms ADM2865E signal and power isolated, half-duplex RS-485 transceivers, respectively. The ADM2865E transceivers are available in a small footprint, 10.15 mm × 10.05 mm, 28-lead, small outline, wide body, with fine pitch (SOIC_W_FP) package.

The ADM2865E features an integrated, isolated, dc-to-dc converter that provides power to the isolated side of the device with no additional ICs required.

An on-board ADP7104 low dropout (LDO) regulator accepts an input voltage of 3.3 V to 20 V and regulates the voltage to a selectable 3.3 V or 5 V supply for the V_CC pin of the ADM2865E. The LDO regulator can be bypassed to power the V_CC pin of the ADM2865E directly.

A screw terminal connector on the evaluation boards allows connection to the flexible V_IO logic supply pin of the ADM2865E. This connection allows the ADM2865E to operate with a digital input/output (I/O) voltage from 1.7 V to 5.5 V, which enables communication with nodes using either a 1.8 V or 2.5 V power supply. The V_IO pin can also be supplied from the ADP7104 regulated supply.

Digital and RS-485 bus signals are easily accessible via the screw terminal connectors on each evaluation board. Each digital input can be configured via the on-board jumper options.

Alternative methods can provide the transmit data input (T×D) signal to the ADM2865E. An LTC6900 oscillator is included on each evaluation board and can be optionally configured to provide a clock signal for the T×D digital input within a 1 kHz to 12.5 MHz range. For optimal signal integrity, use the on-board Subminiature Version A (SMA) connector to connect an external data signal at high data rates up to 25 Mbps.

The EVAL-ADM2865EEBZ is populated with the ADM2865E 5.7 kV rms isolated RS-485 transceiver. The EVAL-ADM2865EEBZ differs from the EVAL-ADM2565EEBZ only by the isolated RS-485 device populated on U3.

For full details on the ADM2865E, see the ADM2865E data sheet, which must be consulted in conjunction with the user guide when using the the EVAL-ADM2865EEBZ.

Resources

PDF

UG-1725: Evaluating the 3 kV RMS ADM2565E and the 5.7 kV RMS ADM2865E, Signal and Power Isolated, RS-485 Transceivers with ±15 kV IEC ESD (Rev.0)

604.64 K

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evaluation kit item images

EVAL-ADM2865E

Evaluating the 5.7 kV RMS ADM2865E Signal and Power Isolated, RS-485 Transceivers with ±15 kV IEC ESD

IBIS Model 1

Simulation Model

IBIS Model

ADM2865E IBIS Model

459.37 KB

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MOD-BUS COMMUNICATION using ADM2865EEBZ

2 Years Ago

RE: RS485 ADM2865 Carrier detect line RXD

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