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ADM3251E:  ISOLATED SINGLE CHANNEL RS-232 LINE DRIVER/RECEIVER

The ADM3251E is a high speed, 2.5 kV fully isolated, single- channel RS-232/V.28 transceiver device that operates from a single 5 V power supply. Due to the high ESD protection on the RIN and TOUT pins, the device is ideally suited for operation in electrically harsh environments or where RS-232 cables are frequently being plugged and unplugged.

The ADM3251E ...More

ADM3251E:  ISOLATED SINGLE CHANNEL RS-232 LINE DRIVER/RECEIVER

Product Description

The ADM3251E is a high speed, 2.5 kV fully isolated, single- channel RS-232/V.28 transceiver device that operates from a single 5 V power supply. Due to the high ESD protection on the RIN and TOUT pins, the device is ideally suited for operation in electrically harsh environments or where RS-232 cables are frequently being plugged and unplugged.

The ADM3251E incorporates dual-channel digital isolators with isoPower™ integrated, isolated power. There is no requirement to use a separate isolated dc-to-dc converter. Chip-scale transformer iCoupler® technology from Analog Devices, Inc., is used both for the isolation of the logic signals as well as for the inte- grated dc-to-dc converter. The result is a total isolation solution.

The ADM3251E contains isoPower technology that uses high frequency switching elements to transfer power through thetransformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. Refer to Application Note AN-0971, Control of Radiated Emissions with isoPower Devices, for details on board layout considerations. The ADM3251E conforms to the EIA/TIA-232E and ITU-T V. 28 specifications and operates at data rates up to 460 kbps. Four external 0.1 μF charge pump capacitors are used for the voltage doubler/inverter, permitting operation from a single 5 V supply.

The ADM3251E is available in a 20-lead, wide body SOIC package and is specified over the −40°C to +85°C temperature range.

Applications

  • High noise data communications
  • Industrial communications
  • General-purpose RS-232 data links
  • Industrial/telecommunications diagnostic ports
  • Medical equipment

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  • 2.5 kV fully isolated (power and data) RS-232 transceiver
  • isoPower integrated, isolated dc-to-dc converter
  • 460 kbps data rate
  • 1 Tx and 1 Rx
  • Meets EIA/TIA-232E specifications
  • ESD protection on RIN and TOUT pins
    ±8 kV: contact discharge
    ±15 kV: air gap discharge
  • 0.1 μF charge pump capacitors
  • High common-mode transient immunity: >25 kV/μs
  • Safety and regulatory approvals
    UL recognition
    2500 V rms for 1 minute per UL 1577
    VDE Certificate of Conformity (pending)
    DIN EN 60747-5-2 (VDE 0884 Teil 2): 2003-01
    CSA Component Acceptance Notice #5A (pending)
  • Operating temperature range: −40°C to +85°C
  • Wide body, 20-lead SOIC package
  • iCouplerType: RS-232
  • # of Inputs Side 1: 1
  • # of Inputs Side 2: 1
  • Max Data Rate(Mbps): 0.46Mbps
  • Package: 20-Lead SOIC
  • Insulation Rating (kVrms): 2.5kV rms
  • Max Operating Temp (°C): 85Deg
  • Pos Supply: +4.5V to +5.5V

Functional Block Diagram for ADM3251E

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For detailed drawings and chemical composition please consult our  Package Site

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Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

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This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.