ADM2485
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ADM2485

2.5 kV Signal Isolated, High Speed (16 Mbps), Half Duplex RS-485 Transceiver w/ Transformer Driver

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1ku List Price Starting From $4.94
Features
  • Half-duplex, isolated RS-485 transceiver
  • Integrated oscillator driver for external transformer
  • PROFIBUS® compliant
  • Complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E)
  • Data rate: 16 Mbps
  • 5 V or 3.3 V operation (VDD1)
  • High common-mode transient immunity: >25 kV/μs
  • Wide-body, 16-lead SOIC package
  • 50 nodes on bus
  • Isolated DE OUT status output
  • Thermal shutdown protection
  • Safety and regulatory approvals
    • UL recognition: 2500 V rms for 1 minute per UL 1577
    • VDE Certificate of Conformity
      • DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
      • Reinforced insulation, VIORM = 560 V peak
  • Operating temperature range: –40°C to +85°C
  • Wide-body, 16-lead SOIC package
Additional Details
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The ADM2485 differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced transmission lines and complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E).

The device employs Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package. An on-chip oscillator outputs a pair of square waveforms that drive an external transformer to provide isolated power with an external transformer. The logic side of the device can be powered with either a 5 V or a 3.3 V supply, and the bus side is powered with an isolated 5 V supply.

The ADM2485 driver has an active high enable. The driver differential outputs and the receiver differential inputs are connected internally to form a differential input/output port that imposes minimal loading on the bus when the driver is disabled or when VDD1 or VDD2 = 0 V. Also provided is an active high receiver disable that causes the receive output to enter a high impedance state.

The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention might cause excessive power dissipation. The part is fully specified over the industrial temperature range and is available in a 16-lead, wide-body SOIC package.

Applications

  • Isolated RS-485/RS-422 interfaces
  • PROFIBUS networks
  • Industrial field networks
  • Multipoint data transmission systems
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Part Models 2
1ku List Price Starting From $4.94
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ADM2485

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Data Sheet

2

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UPDATED 07/10/2008
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ADM2485: High Speed, Isolated RS-485 Transceiver with Integrated Transformer Driver Data Sheet (Rev.A)

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580 kB
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UPDATED 08/15/2008
Japanese

ADM2485: トランス・ドライバ内蔵の高速絶縁型RS-485トランシーバ (Rev.A)

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1097 kB
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Application Note

23

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UPDATED 11/01/2006
English
AN-740: iCoupler® Isolation in RS-232 Applications (Rev.A) redirect icon

218.29 K

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UPDATED 08/31/2010
Chinese
AN-740: RS-232应用中的iCoupler® 隔离 (Rev.0) redirect icon

494 kB

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UPDATED 11/09/2010
Japanese
AN-740: RS-232アプリケーションでのiCoupler®アイソレーション (Rev.0) redirect icon

560 kB

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UPDATED 11/01/2006
English
AN-727: iCoupler® Isolation in RS-485 Applications (Rev.0) redirect icon

282 kB

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UPDATED 07/26/2010
Chinese
AN-727: RS-485应用中的iCoupler®隔离 (Rev.0) redirect icon

373 kB

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UPDATED 02/21/2011
Japanese
AN-727: RS-485アプリケーションでのiCoupler®アイソレータ (Rev.0) redirect icon

756 kB

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pdf

UPDATED 11/01/2006
English
AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev.A) redirect icon

246 kB

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UPDATED 01/31/2011
Chinese
AN-793: iCoupler®隔离产品的ESD/闩锁考虑因素 (Rev.A) redirect icon

500 kB

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UPDATED 11/01/2006
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AN-793: iCoupler®アイソレータ製品のESD / ラッチアップに関する考慮事項 (Rev.0) redirect icon

331 kB

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pdf

UPDATED 11/01/2006
English
AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev.0) redirect icon

181 kB

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UPDATED 09/09/2010
Chinese
AN-825: iCoupler®隔离产品的电源考虑因素 (Rev.0) redirect icon

181 kB

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UPDATED 11/01/2006
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AN-825: iCoupler®アイソレーション製品での電源の考慮事項 (Rev.0) redirect icon

340 kB

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UPDATED 11/10/2017
English
AN-1493: Half-Duplex, Isolated RS-485 Interface (Rev.B) redirect icon

86.52 K

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UPDATED 02/07/2014
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AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format redirect icon

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UPDATED 02/07/2014
Chinese
AN-1176: 二进制.Bxl文件格式的元件尺寸和符号 redirect icon

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UPDATED 03/01/2015
English
AN-1179: Junction Temperature Calculation for Analog Devices RS-485/RS-422, CAN, and LVDS/M-LVDS Transceivers redirect icon

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UPDATED 03/01/2015
Japanese
AN-1179: アナログ・デバイセズの RS-485/RS-422、CAN、およびLVDS/M-LVDS トランシーバーのジャンクション温度算出 redirect icon

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UPDATED 07/09/2020
English
AN-960: RS-485/RS-422 Circuit Implementation Guide redirect icon

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UPDATED 07/09/2020
Chinese
AN-960：RS-485/RS-422电路实施指南 redirect icon

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UPDATED 07/09/2020
Japanese
AN-960: RS-485/RS-422 回路の実装ガイド redirect icon

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UPDATED 07/03/2020
English
AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices redirect icon

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UPDATED 07/03/2020
Chinese
AN-0971: iso Power器件的辐射控制建议 redirect icon

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UPDATED 07/03/2020
Japanese
AN-0971：isoPower デバイスでの EMI 放射制御についての推奨事項 redirect icon

Technical Articles

7

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UPDATED 12/10/2010
English
NAppkin Note: Lowering the Power of the ADuM524x redirect icon

223 kB

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UPDATED 12/10/2010
English
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary redirect icon

291 kB

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UPDATED 04/01/2012
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Digital Isolators Offer Performance Advantages in Industrial Motor Drive Applications redirect icon

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UPDATED 04/01/2012
Chinese
利用数字隔离器简化设计并确保系统可靠性 redirect icon

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UPDATED 04/01/2012
Japanese
産業用モーター駆動で優位性を発揮するデジタル・アイソレータ redirect icon

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UPDATED 12/01/2021
English
Options and Solutions for Partitioning Isolated Power in Isolated RS-485 Nodes redirect icon

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UPDATED 12/01/2021
Chinese
在隔离RS-485节点中划分隔离电源的选项和解决方案 redirect icon

Safety and Regulatory Compliance

2

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UPDATED 01/28/2016
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Safety and Regulatory Compliance Information redirect icon

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UPDATED 01/28/2016
Japanese
安全規格認証や適合の取得状況 redirect icon

User Guide

2

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UPDATED 07/28/2011
English
UG-213: Evaluation Board for the ADM2485 Half-Duplex, Isolated RS-485 Transceiver with Transformer Driver redirect icon

293 kB

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pdf

UPDATED 07/28/2011
Chinese
UG-213：内置变压器驱动器的半双工、隔离式RS-485收发器ADM2485的评估板 redirect icon

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Frequently Asked Question

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UPDATED 05/17/2017
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Documentation

Technical Documents 17
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Data Sheet 1

ADM2485: High Speed, Isolated RS-485 Transceiver with Integrated Transformer Driver Data Sheet (Rev.A)

User Guide 1

UG-213: Evaluation Board for the ADM2485 Half-Duplex, Isolated RS-485 Transceiver with Transformer Driver

Application Note 9

AN-740: iCoupler® Isolation in RS-232 Applications (Rev.A)
AN-727: iCoupler® Isolation in RS-485 Applications (Rev.0)
AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev.A)
AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev.0)
AN-1493: Half-Duplex, Isolated RS-485 Interface (Rev.B)
AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format
AN-1179: Junction Temperature Calculation for Analog Devices RS-485/RS-422, CAN, and LVDS/M-LVDS Transceivers
AN-960: RS-485/RS-422 Circuit Implementation Guide
AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices

Technical Articles 4

NAppkin Note: Lowering the Power of the ADuM524x
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary
Digital Isolators Offer Performance Advantages in Industrial Motor Drive Applications
Options and Solutions for Partitioning Isolated Power in Isolated RS-485 Nodes

Safety and Regulatory Compliance 1

Safety and Regulatory Compliance Information

Frequently Asked Question 1

FAQ

Safety and Regulatory Compliance 1

Safety and Regulatory Compliance Information

Solutions Bulletin & Brochure 1

Building the Future of Industrial Robotics

Product Selection Guide 1

Digital Isolation and Interface Technology Selection Guide

Webcast 2

Solving Isolation Challenges in Power Conversion Applications
Solving Isolation Challenges in Industrial Automation

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2020-10-28

01:00

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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
ADM2485BRWZ 16-Lead SOIC Wide external-link
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ADM2485BRWZ-REEL7 16-Lead SOIC Wide external-link
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Mar 13, 2024

- 23_0069

Qualification Notification of Alternate Wafer Fab Site at ADI Limerick for Select Isolator Products

ADM2485BRWZ

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ADM2485BRWZ-REEL7

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PCN23_0069_Form

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Material_Report

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Qualification Results Summary

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Delta Qualification Matrix

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Qualification Results Summary

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Sep 22, 2015

- 15_0135

Alternate Assembly Site of Select Isolator Products in 8L/16L SOIC_N, 16L/20L SOIC_W and 16L/20L SOIC_IC at ASE Chungli

ADM2485BRWZ

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ADM2485BRWZ-REEL7

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PCN15_0135_Form

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Detailed Change Description

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Qualification Results Summary

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Apr 22, 2015

- 14_0173

Qualification of Alternate Fab Foundry at Analog Devices, Limerick for IC and TC die in Isolator RS-485 Transceivers

ADM2485BRWZ

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ADM2485BRWZ-REEL7

PRODUCTION

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PCN14_0173_Form

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Material_Report

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Qualification Results Summary

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Flow Chart

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Feb 27, 2012

- 11_0066

Qualification of Alternate Fab Foundry Gold Plating Process Site for Isolation Products at ADI Limerick.

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

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PCN11_0066_Form

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Material_Report

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Qualification Plan Summary

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Flow Chart

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Aug 4, 2010

- 10_0117

Halogen Free Material Change for SOIC_W Products at Carsem

ADM2485BRWZ

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ADM2485BRWZ-REEL7

PRODUCTION

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PCN10_0117_Form

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Material_Report

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Reliability Report

Dec 21, 2009

- 06_0159

Qualification of 8" S6 wafer fab process at Analog Devices, Limerick, Ireland.

ADM2485BRWZ

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ADM2485BRWZ-REEL7

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PCN06_0159_Form

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RQR03910S

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Mar 13, 2024

- 23_0069

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Qualification Notification of Alternate Wafer Fab Site at ADI Limerick for Select Isolator Products

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

pdf

PCN23_0069_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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pdf

Qualification Results Summary

external-icon
Sep 22, 2015

- 15_0135

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Alternate Assembly Site of Select Isolator Products in 8L/16L SOIC_N, 16L/20L SOIC_W and 16L/20L SOIC_IC at ASE Chungli

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

pdf

PCN15_0135_Form

external-icon

xls

Material_Report

Download
Detailed Change Description

pdf

Qualification Results Summary

external-icon
Apr 22, 2015

- 14_0173

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Qualification of Alternate Fab Foundry at Analog Devices, Limerick for IC and TC die in Isolator RS-485 Transceivers

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

pdf

PCN14_0173_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

pdf

Flow Chart

external-icon
Feb 27, 2012

- 11_0066

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Qualification of Alternate Fab Foundry Gold Plating Process Site for Isolation Products at ADI Limerick.

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

pdf

PCN11_0066_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Plan Summary

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pdf

Flow Chart

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Aug 4, 2010

- 10_0117

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Halogen Free Material Change for SOIC_W Products at Carsem

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

pdf

PCN10_0117_Form

external-icon

xls

Material_Report

Download
Reliability Report
Dec 21, 2009

- 06_0159

arrow down

Qualification of 8" S6 wafer fab process at Analog Devices, Limerick, Ireland.

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

xls

Material_Report

Download

pdf

PCN06_0159_Form

external-icon

pdf

RQR03910S

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Software & Part Ecosystem

Parts Product Life Cycle Description
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2.75kVRMS Isolated 20Mbps Half-Duplex PROFIBUS/RS-485 Transceiver with ±35kV ESD Protection and Integrated Transformer Driver

Evaluation Kits 1

EVAL-ADM2485

ADM2485 Evaluation Board

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EVAL-ADM2485

ADM2485 Evaluation Board

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EVAL-ADM2485
ADM2485 Evaluation Board
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Product Detail

The ADM2485 evaluation board allows the ADM2485 isolated RS-485 transceiver to be quickly and easily evaluated. The evaluation board allows all of the input and output functions to be exercised without the need for external components. When the ADM2485 is powered by 3.3 V on the logic side, a transformer, TI, is required with a turns ratio of 1:2.2 (DA2304_AL) to step up the 3.3 V to 6 V. This ensures that there is enough headroom for the ADP667 LDO to output a regulated 5 V output (EVAL-ADM2485EB3Z).

If the ADM2485 is powered by 5 V on the logic side, a trans-former, TI, is required with a turns ratio of 1:1.5 (DA2303_AL) so that there is enough headroom for the ADP667 LDO to output a regulated 5 V output (EVAL-ADM2485EB5Z).

Resources

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UG-213: Evaluation Board for the ADM2485 Half-Duplex, Isolated RS-485 Transceiver with Transformer Driver Download

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Evaluation Kits1

EVAL-ADM2485

ADM2485 Evaluation Board

Reference Designs 1

Half-Duplex Isolated RS-485 Interface Using ADM2485 and ADP3330

CN0031

Half-Duplex, Isolated RS-485 Interface

Reference Designs1

Half-Duplex Isolated RS-485 Interface Using ADM2485 and ADP3330

CN0031

Half-Duplex, Isolated RS-485 Interface

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