ADM2485
warning : NOT RECOMMENDED FOR NEW DESIGNS
searchIcon
cartIcon

ADM2485

2.5 kV Signal Isolated, High Speed (16 Mbps), Half Duplex RS-485 Transceiver w/ Transformer Driver

Show More showmore-icon

warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
Part Models 2
1ku List Price Starting From $4.94
Features
  • Half-duplex, isolated RS-485 transceiver
  • Integrated oscillator driver for external transformer
  • PROFIBUS® compliant
  • Complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E)
  • Data rate: 16 Mbps
  • 5 V or 3.3 V operation (VDD1)
  • High common-mode transient immunity: >25 kV/μs
  • Wide-body, 16-lead SOIC package
  • 50 nodes on bus
  • Isolated DE OUT status output
  • Thermal shutdown protection
  • Safety and regulatory approvals
    • UL recognition: 2500 V rms for 1 minute per UL 1577
    • VDE Certificate of Conformity
      • DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
      • Reinforced insulation, VIORM = 560 V peak
  • Operating temperature range: –40°C to +85°C
  • Wide-body, 16-lead SOIC package
Additional Details
show more Icon

The ADM2485 differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced transmission lines and complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E).

The device employs 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 with an external transformer. 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 5 V supply.

The ADM2485 driver has an active high enable. The driver differential outputs and the receiver differential inputs are connected internally to form a differential input/output port that imposes minimal loading on the bus when the driver is disabled or when VDD1 or VDD2 = 0 V. Also provided is an active high receiver disable that causes the receive output to enter a high impedance state.

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 and is available in a 16-lead, wide-body SOIC package.

Applications

  • Isolated RS-485/RS-422 interfaces
  • PROFIBUS networks
  • Industrial field networks
  • Multipoint data transmission systems
Part Models 2
1ku List Price Starting From $4.94

close icon

Documentation

Technical Documents 17
show more Icon

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADM2485BRWZ
  • HTML
  • HTML
ADM2485BRWZ-REEL7
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Mar 13, 2024

- 23_0069

Qualification Notification of Alternate Wafer Fab Site at ADI Limerick for Select Isolator Products

Sep 22, 2015

- 15_0135

Alternate Assembly Site of Select Isolator Products in 8L/16L SOIC_N, 16L/20L SOIC_W and 16L/20L SOIC_IC at ASE Chungli

Apr 22, 2015

- 14_0173

Qualification of Alternate Fab Foundry at Analog Devices, Limerick for IC and TC die in Isolator RS-485 Transceivers

Feb 27, 2012

- 11_0066

Qualification of Alternate Fab Foundry Gold Plating Process Site for Isolation Products at ADI Limerick.

Aug 4, 2010

- 10_0117

Halogen Free Material Change for SOIC_W Products at Carsem

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

Dec 21, 2009

- 06_0159

Qualification of 8" S6 wafer fab process at Analog Devices, Limerick, Ireland.

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Mar 13, 2024

- 23_0069

arrow down

Qualification Notification of Alternate Wafer Fab Site at ADI Limerick for Select Isolator Products

Sep 22, 2015

- 15_0135

arrow down

Alternate Assembly Site of Select Isolator Products in 8L/16L SOIC_N, 16L/20L SOIC_W and 16L/20L SOIC_IC at ASE Chungli

Apr 22, 2015

- 14_0173

arrow down

Qualification of Alternate Fab Foundry at Analog Devices, Limerick for IC and TC die in Isolator RS-485 Transceivers

Feb 27, 2012

- 11_0066

arrow down

Qualification of Alternate Fab Foundry Gold Plating Process Site for Isolation Products at ADI Limerick.

Aug 4, 2010

- 10_0117

arrow down

Halogen Free Material Change for SOIC_W Products at Carsem

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

Dec 21, 2009

- 06_0159

arrow down

Qualification of 8" S6 wafer fab process at Analog Devices, Limerick, Ireland.

ADM2485BRWZ

PRODUCTION

ADM2485BRWZ-REEL7

PRODUCTION

Software & Part Ecosystem

Evaluation Kits 1

EVAL-ADM2485

ADM2485 Evaluation Board

zoom

EVAL-ADM2485

ADM2485 Evaluation Board

ADM2485 Evaluation Board

Product Detail

The ADM2485 evaluation board allows the ADM2485 isolated RS-485 transceiver to be quickly and easily evaluated. The evaluation board allows all of the input and output functions to be exercised without the need for external components. When the ADM2485 is powered by 3.3 V on the logic side, a transformer, TI, is required with a turns ratio of 1:2.2 (DA2304_AL) to step up the 3.3 V to 6 V. This ensures that there is enough headroom for the ADP667 LDO to output a regulated 5 V output (EVAL-ADM2485EB3Z).

If the ADM2485 is powered by 5 V on the logic side, a trans-former, TI, is required with a turns ratio of 1:1.5 (DA2303_AL) so that there is enough headroom for the ADP667 LDO to output a regulated 5 V output (EVAL-ADM2485EB5Z).

Reference Designs 1

Half-Duplex Isolated RS-485 Interface Using ADM2485 and ADP3330

Half-Duplex, Isolated RS-485 Interface

Recently Viewed