1. Products
  2. Interface and Isolation
  3. RS-232 / RS-422 / RS-485 / RS-562
  4. RS-485 and RS-422
  5. ADM488A


Overview

Features and Benefits

  • Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E)
  • 250 kbps data rate
  • Single 5 V ± 10% supply
  • −7 V to +12 V bus common-mode range
  • Connect up to 32 nodes on the bus
  • Reduced slew rate for low EM interference
  • Short-circuit protection
  • 30 μA supply current

Product Details

The ADM488A and ADM489A are low power, differential line transceivers suitable for communication on multipoint bus transmission lines. They are intended for balanced data transmission and comply with both RS-485 and RS-422 standards of the Electronics Industries Association (EIA). Both products contain a single differential line driver and a single differential line receiver, making them suitable for full-duplex data transfer. The ADM489A contains an additional receiver and driver enable control.

The input impedance is 12 kΩ, allowing 32 transceivers to be connected on the bus. The ADM488A / ADM489A operate from a single 5 V ± 10% power supply.

Excessive power dissipation that is caused by bus contention or output shorting is prevented by a thermal shutdown circuit. This feature forces the driver output into a high impedance state if, during fault conditions, a significant temperature increase is detected in the internal driver circuitry. The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).

The ADM488A / ADM489A are fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

The ADM488A / ADM489A are fully specified over the industrial temperature range and are available in SOIC and MSOP packages.

APPLICATIONS

  • Low power RS-485 and RS-422 systems
  • DTE-DCE interface
  • Packet switching
  • Local area networks
  • Data concentration
  • Data multiplexers
  • Integrated services digital network (ISDN)

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Design Resources

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 Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
ADM488ABRMZ Material Declaration Reliability Data 8-Lead MSOP
ADM488ABRMZ-REEL7 Material Declaration Reliability Data 8-Lead MSOP
ADM488ABRZ Material Declaration Reliability Data 8-Lead SOIC
ADM488ABRZ-REEL7 Material Declaration Reliability Data 8-Lead SOIC
Wafer Fabrication Data

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.