ADM3493 3.3 V, ⅛ Load, Low Power, RS-485/RS-422 Transceiver (Half Duplex, 250 kbps, Slew Rate Limited, DE/RE)

The ADM3493 is a low power, differential line transceiver designed to operate using a single 3.3 V power supply. Low power consumption, coupled with a shutdown mode, makes it ideal for power-sensitive applications. The ADM3493 is suitable for communication on multipoint bus transmission lines.

The device contains one driver and one receiver. Designed for half-duplex communication, the ADM3493 features a slew rate limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250 kbps.

The receiver input impedance is 96 kΩ, allowing up to 256 transceivers to be connected on the bus. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. If a significant temperature increase is detected in the internal driver circuitry during fault conditions then the thermal shutdown circuit forces the driver output into a high impedance state. The receiver contains a fail-safe feature that results in a logic high output state, if the inputs are unconnected (floating).

The ADM3493 is fully specified over the commercial and industrial temperature ranges and is available in an 8-lead SOIC.

Features and Benefits
  • Operates with 3.3 V Supply
  • Interoperable with 5 V Logic
  • EIA RS-422 and RS-485 Compliant over Full CM Range
  • Data Rate: 250 kbps
  • Half Duplex Transceiver
  • Reduced Slew Rates for Low EMI
  • 2 nA Supply Current in Shutdown Mode
  • Up to 256 Transceivers on a Bus
  • −7 V to +12 V Bus Common-mode Range
  • Specified over −40°C to +85°C Temperature Range
  • 8 ns Skew
  • Available in 8-lead SOIC
Interface & Isolation
Data Sheets
Documentnote
ADM3493: 3.3 V Slew Rate Limited, Half Duplex RS-485/RS-422 Transceiver Data Sheet (Rev. 0)PDF 334 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
ADM3493ARZ Production8 ld SOICOTH 98-40 to 85C1.060.96Y
ADM3493ARZ-REEL7 Production8 ld SOICREEL 1000-40 to 85C00.96Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-RS485HDEBZStandard Half-Duplex RS-485 Evaluation Board30Y
Reference Materials
ADM3493: 3.3 V Slew Rate Limited, Half Duplex RS-485/RS-422 Transceiver Data Sheet (Rev. 0) adm3493
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
ADI RS-485/RS-422 Cross Reference Guide adm2486