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ADUM1251:  HOT SWAPPABLE DUAL I2C ISOLATOR

The ADuM1250/ADuM12511 are hot swappable digital isolators with nonlatching, bidirectional communication channels compatible with I2C® interfaces. This eliminates the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers.

The ADuM1250 provides two bidirectional channels, supporting a complete isolated ...More

ADUM1251:  HOT SWAPPABLE DUAL I2C ISOLATOR

Product Description

The ADuM1250/ADuM12511 are hot swappable digital isolators with nonlatching, bidirectional communication channels compatible with I2C® interfaces. This eliminates the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers.

The ADuM1250 provides two bidirectional channels, supporting a complete isolated I2C interface. The ADuM1251 provides one bidirectional channel and one unidirectional channel for those applications where a bidirectional clock is not required.

Both the ADuM1250 and ADuM1251 contain hot swap circuitry to prevent glitching data when an unpowered card is inserted onto an active bus.

These isolators are based on iCoupler® chip scale transformer technology from Analog Devices, Inc. iCoupler is a magnetic isolation technology with functional, performance, size, and power consumption advantages as compared to optocouplers. With the ADuM1250/ADuM1251, iCoupler channels can be integrated with semiconductor circuitry, which enables a complete isolated I2C interface to be implemented in a small form factor.

Applications

  • Isolated I2C, SMBus, or PMBus interfaces
  • Multilevel I2C interfaces
  • Power supplies
  • Networking
  • Power-over-Ethernet

1Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.

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  • Bidirectional I2C communication
  • Open-drain interfaces
  • Suitable for hot swap applications
  • 30 mA current sink capability
  • 1000 kHz operation
  • 3.0 V to 5.5 V supply/logic levels
  • 8-lead SOIC RoHS-compliant package
  • High temperature operation:
    125°C
  • Safety and regulatory approvals
    UL recognition
    2500 V rms for 1 minute per UL 1577
    CSA Component Acceptance Notice #5A
    VDE certificate of conformity
    DIN V VDE V 0884-10
    (VDE V 0884-10):2006-12
    VIORM = 560 V peak
  • # Ch: 1
  • iCouplerType: I2C,iCoupler
  • # of Inputs Side 1: 1
  • # of Inputs Side 2: 1
  • Max Data Rate(Mbps): 1Mbps
  • Package: 8-Lead SOIC
  • Insulation Rating (kVrms): 2.5kV rms
  • Max Operating Temp (°C): 105Deg
  • Pos Supply: +3V to +5.5V
  • Max Prop Delay (ns): 150ns

Functional Block Diagram for ADuM1251

OF NOTE ...

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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.

Temperature Range
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.

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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.