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ADuM1251 Datasheet

ADuM1251 Datasheet

Hot Swappable, Dual I2C Isolators
Part No.: ADuM1251
Page: 14 Pages
Size: 350 KB
Manufacturer: Analog Devices, Inc.
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Views: 1
Update Time: 2023-11-24 10:58:54
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ADuM1251 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
ADUM1251ARZ Tube 98   3 8 -40°C ~ 105°C 8-Lead SOIC  
ADUM1251ARZ-RL7 Reel 1000   3 8 -40°C ~ 105°C 8-Lead SOIC  
ADUM1251WARZ Tube 98   3 8 -40°C ~ 125°C 8-Lead SOIC  
ADUM1251WARZ-RL7 Reel 1000   3 8 -40°C ~ 125°C 8-Lead SOIC  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

ADuM1251 Datasheet(PDF)

ADuM1251 Datasheet(Picture)

ADuM1251 Features

  • 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, RoHS compliant SOIC package
  • High temperature operation: 125°C
  • Qualified for automotive applications
  • Safety and regulatory approvals
    • DIN VDE V 0884-11:2017-01
      • Reinforced VIORM = 560 V peak
    • 2500 V rms for 1 minute per UL 1577
    • IEC/EN/CSA 62368-1
    • IEC/CSA 61010-1
    • CAN/CSA-C22.2 No. 14-18
    • GB4943.1-2011

ADuM1251 Applications

  • Isolated I2C, SMBus, or PMBus interfaces
  • Multilevel I2C interfaces
  • Power supplies
  • Networking
  • Power over Ethernet
  • Hybrid electric vehicle battery management

ADuM1251 Description

The ADuM1251 are hot swappable digital isolators with non-latching, bidirectional communication channels that are compatible with I2C interfaces. This eliminates the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers.

The ADuM1251 provides one bidirectional channel and one unidirectional channel for applications where a bidirectional clock is not required.

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

These isolators are based on the 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 ADuM1251, iCoupler channels can be integrated with semiconductor circuitry, which enables a complete isolated I2C interface to be implemented in a small form factor.

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