ADM2487E 2.5 kV Signal Isolated, ESD Protected, Full/Half Duplex RS-485 Transceiver w/ Transformer Driver (500 kbps)

Applications Isolated RS-485/RS-422 interfaces Industrial field networks Multipoint data transmission systems

The ADM2482E/ADM2487E are isolated data transceivers with ±15 kV ESD protection and are suitable for high speed, half-duplex or full-duplex communication on multipoint transmission lines. For half-duplex operation, the transmitter outputs and receiver inputs share the same transmission line. Transmitter Output Pin Y is linked externally to Receiver Input Pin A, and Transmitter Output Pin Z to Receiver Input Pin B. The parts are designed for balanced transmission lines and comply with TIA/EIA- 485-A-98 and ISO 8482:1987(E).

The devices employ the 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. 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 3.3 V supply.

The ADM2482E/ADM2487E driver has an active high enable, and the receiver has an active low enable. The driver output enters a high impedance state when the driver enable signal is low. The receiver output enters a high impedance state when the receiver enable signal is high.

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 of −40°C to +85°C and is available in a 16-lead, wide-body SOIC package.

Applications
  • Isolated RS-485/RS-422 interfaces
  • Industrial field networks
  • Multipoint data transmission systems
Features and Benefits
  • Isolated RS-485/RS-422 transceiver, configurable as half or full duplex
  • Integrated oscillator driver for external transformer
  • ±15 kV ESD protection on RS485 input/output pins
  • Complies with TIA/EIA-485-A-98 and ISO 8482:1987(E)
  • Data rate: 500 kbps
  • 5 V or 3.3 V operation (VDD1)
  • 256 nodes on bus
  • True fail-safe receiver inputs
  • Safety and regulatory approvals
    • UL recognition: 2500 V rms for 1 minute per UL 1577
    • VDE certificates of conformity DIN VVDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 560 V peak
  • UL recognition: 2500 V rms for 1 minute per UL 1577
  • VDE certificates of conformity
    • DIN VVDE V 0884-10 (VDE V 0884-10):2006-12
    • VIORM = 560 V peak
  • DIN VVDE V 0884-10 (VDE V 0884-10):2006-12
  • VIORM = 560 V peak
  • Thermal shutdown protection
  • Operating temperature range: −40°C to +85°C
  • Wide-body, 16-lead SOIC package
  • Interface & Isolation
    Data Sheets
    Documentnote
    ADM2482E/ADM2487E: 2.5 kV Isolated RS-485 Transceivers with Integrated Transformer Driver Data Sheet (Rev. A)PDF 709 kB
    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-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
    User Guides
    Documentnote
    UG-210: Evaluation Boards for the ADM2482E and ADM2487E Isolated RS-485 TransceiversPDF 299 kB
    Frequently Asked Questions
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    ADM2487EBRWZ Production16 ld SOIC - WideOTH 47-40 to 85C4.33.64Y
    ADM2487EBRWZ-REEL7 Production16 ld SOIC - WideREEL 400-40 to 85C03.64Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-ADM2487EEB3ZEvaluation Board75Y
    EVAL-ADM2487EEB5ZEvaluation Board75Y
    Reference Materials
    ADM2482E/ADM2487E: 2.5 kV Isolated RS-485 Transceivers with Integrated Transformer Driver Data Sheet (Rev. A) adm2482e
    AN-1179: Junction Temperature Calculation for Analog Devices RS-485/RS-422, CAN, and LVDS/M-LVDS Transceivers (Rev. A) adn4670
    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-960: RS-485/RS-422电路实施指南 (Rev. 0) adm2486
    AN-960: RS-485/RS-422 Circuit Implementation Guide (Rev. 0) adm2486
    UG-210: Evaluation Boards for the ADM2482E and ADM2487E Isolated RS-485 Transceivers adm2482e
    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
    MS-2155: Options and Solutions for Partitioning Isolated Power in Isolated... 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