ADM2483 Half-Duplex, iCoupler® Isolated RS-485 Transceiver

The ADM2483 differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on balanced, multipoint bus transmission lines. It complies with ANSI EIA/TIA-485-A and ISO 8482: 1987(E). Using Analog Devices’ iCoupler technology, the ADM2483 combines a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package. The logic side of the device is powered with either a 5 V or 3 V supply, and the bus side uses a 5 V supply only.

The ADM2483 is slew-limited to reduce reflections with improperly terminated transmission lines. The controlled slew rate limits the data rate to 500 kbps. The device’s input impedance is 96 kΩ, allowing up to 256 transceivers on the bus. Its driver has an active-high enable feature. The driver differential outputs and receiver differential inputs are connected internally to form a differential I/O port. When the driver is disabled or when VDD1 or VDD2 = 0 V, this imposes minimal loading on the bus. An active-high receiver disable feature, which causes the receive output to enter a high impedance state, is provided as well.

The receiver inputs have a true fail-safe feature that ensures a logic-high receiver output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and at the point when communication ends.

Current limiting and thermal shutdown features protect against output short circuits and bus contention situations that 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
  • Low power RS-485/RS-422 networks
  • Isolated interfaces
  • Building control networks
  • Multipoint data transmission systems
Features and Benefits
  • RS-485 transceiver with electrical data isolation
  • Complies with ANSI TIA/EIA RS-485-A and ISO 8482: 1987(E)
  • 500 kbps data rate
  • Slew rate-limited driver outputs
  • Low power operation: 2.5 mA max
  • Suitable for 5 V or 3 V operations (VDD1)
  • High common-mode transient immunity: >25 kV/μs
  • True fail-safe receiver inputs
  • Chatter-free power-up/power-down protection
  • 256 nodes on bus
  • Thermal shutdown protection
  • Safety and regulatory approvals
    • UL recognition: 2500 V rms for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A IEC 609501 800 V rms (basic), 400 V rms (reinforced)
    • VDE Certificate of Conformity DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 VIORM = 560 V peak
    • CQC certification per GB4943.1-2011
  • UL recognition: 2500 V rms for 1 minute per UL 1577
  • CSA Component Acceptance Notice 5A
    • IEC 609501 800 V rms (basic), 400 V rms (reinforced)
  • IEC 609501 800 V rms (basic), 400 V rms (reinforced)
  • VDE Certificate of Conformity
    • DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
    • VIORM = 560 V peak
  • DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
  • VIORM = 560 V peak
  • CQC certification per GB4943.1-2011
  • Operating temperature range: −40°C to +85°C
    • Interface & Isolation
    Data Sheets
    Documentnote
    ADM2483: Half-Duplex  iCoupler® Isolated RS-485 Transceiver Data Sheet (Rev. E)PDF 376.24 K
    Application Notes
    Documentnote
    AN-1179: Junction Temperature Calculation for Analog Devices RS-485/RS-422, CAN, and LVDS/M-LVDS Transceivers (Rev. A)PDF 156.87 K
    AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices (Rev. C)PDF 406 kB
    AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format (Rev. 0)PDF 671 kB
    AN-960: RS-485/RS-422 Circuit Implementation Guide (Rev. 0)PDF 245 kB
    AN-727: iCoupler® Isolation in RS-485 Applications (Rev. 0)PDF 282 kB
    AN-740: iCoupler® Isolation in RS-232 Applications (Rev. 0)PDF 716 kB
    AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev. A)PDF 246 kB
    AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev. 0)PDF 181 kB
    User Guides
    Documentnote
    UG-239: Evaluation Board for the ADM2483 Half-Duplex iCoupler Isolated RS-485 TransceiverPDF 171 kB
    Frequently Asked Questions
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD51/068Z-0REEL Obsolete16 ld SOIC - WideREEL 1000-40 to 85C00Y
    AD51/069-0REEL Contact ADI16 ld SOIC - WideREEL 1000-40 to 85C00N
    ADM2483BRW Production16 ld SOIC - WideOTH 47-40 to 85C3.853.51N
    ADM2483BRW-REEL Production16 ld SOIC - WideREEL 1000-40 to 85C03.51N
    ADM2483BRWZ Production16 ld SOIC - WideOTH 47-40 to 85C3.343.04Y
    ADM2483BRWZ-REEL Production16 ld SOIC - WideREEL 1000-40 to 85C03.04Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-ADM2483EBZEvaluation Board75Y
    Reference Materials
    ADM2483: Half-Duplex  iCoupler® Isolated RS-485 Transceiver Data Sheet (Rev. E) adm2483
    AN-1179: Junction Temperature Calculation for Analog Devices RS-485/RS-422, CAN, and LVDS/M-LVDS Transceivers (Rev. A) adn4670
    AN-0971: isoPower器件的辐射控制建议 (Rev. C) adum1233
    AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices (Rev. C) ad7400
    AN-1176：二进制.Bxl文件格式的元件尺寸和符号 (Rev. 0) adn4670
    AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format (Rev. 0) adn4670
    AN-793: iCoupler®隔离产品的ESD/闩锁考虑因素 (Rev. A) adum1233
    AN-740: RS-232应用中的Coupler® 隔离 (Rev. 0) adum1233
    AN-960: RS-485/RS-422电路实施指南 (Rev. 0) adm2486
    AN-727: RS-485应用中的iCoupler®隔离 (Rev. 0) adum1233
    AN-960: RS-485/RS-422 Circuit Implementation Guide (Rev. 0) adm2486
    AN-727: iCoupler® Isolation in RS-485 Applications (Rev. 0) ad7400
    AN-740: iCoupler® Isolation in RS-232 Applications (Rev. 0) ad7400
    AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev. A) ad7400
    AN-825: iCoupler®隔离产品的电源考虑因素 (Rev. 0) adum1233
    AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev. 0) ad7400
    UG-239: Evaluation Board for the ADM2483 Half-Duplex iCoupler Isolated RS-485 Transceiver adm2483
    数字隔离器产品选型与资源指南 adum1233
    Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4 ad7656
    Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3 ad7780
    RS-232 Transceivers Cross Reference Guide adm2486
    ADI RS-485/RS-422 Cross Reference Guide adm2486
    MS-2127: 在太阳能逆变器中利用 i Coupler 数字隔离器进行设计 adum3220
    Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with ad7400
    NAppkin Note: Lowering the Power of the ADuM524x ad7400
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