ADM1487E 5 V, ±15 kV ESD Protected, Half Duplex RS-485/RS-422 Transceiver (2.5 Mbps, ¼ Load)

The ADM485E/ADM487E/ADM1487E are 5 V low power data transceivers with ±15 kV ESD protection suitable for halfduplex communication on multipoint bus transmission lines. They are designed for balanced data transmission and comply with TIA/EIA standards RS-485 and RS-422. The ADM487E and the ADM1487E have a 1/4 unit load receiver input impedance that allows up to 128 transceivers on a bus, while the ADM485E allow up to 32 transceivers on a bus. Since only one driver is enabled at any time, the output of a disabled or powerdown driver is three-stated to avoid overloading the bus. The driver outputs are slew rate-limited in order to reduce EMI and data errors caused by reflections from improperly terminated buses. Excessive power dissipation caused by bus contention or output shorting is prevented with a thermal shutdown circuit. The parts are fully specified over the industrial temperature ranges and are available in 8-lead SOIC packages. Applications Energy/power metering Lighting systems Industrial control Telecommunications Security systems Instrumentation

Applications
  • Energy/power metering
  • Lighting systems
  • Industrial control
  • Telecommunications
  • Security systems
  • Instrumentation
Features and Benefits
  • TIA/EIA RS-485/RS-422 compliant
  • ESD protection on RS-485 I/O pins
  • ±15 kV human body model
  • Data rates: 2.5 Mbps
  • Half-duplex options
  • Reduced slew rates for low EMI
  • −7 V to +12 V common-mode input range
  • Thermal shutdown and short-circuit protection
  • 8-lead SOIC packages
Interface & Isolation
Data Sheets
Documentnote
ADM485E/ADM487E/ADM1487E: 5 V, 15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers Data Sheet (Rev. B)PDF 757 kB
Application Notes
Documentnote
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
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADM1487EARZ Production8 ld SOICOTH 98-40 to 85C1.090.95Y
ADM1487EARZ-REEL7 Production8 ld SOICREEL 1000-40 to 85C00.95Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-RS485HDEBZStandard Half-Duplex RS-485 Evaluation Board30Y
Reference Materials
ADM485E/ADM487E/ADM1487E: 5 V, 15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers Data Sheet (Rev. B) adm1487e
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
Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4 ad7656
Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3 ad7780