ADUM2251 Hot-Swappable Dual I2C® Isolators, 5 kV

The ADuM2250/ADuM2251 are hot swappable digital isolators with nonlatching, bidirectional communication channels and are compatible with I2C interfaces. This eliminates the need for splitting I2C signals into separate transmit and receive signals for use with stand-alone optocouplers.

The ADuM2250 provides two bidirectional channels, supporting a complete isolated I2C interface. The ADuM2251 provides one bidirectional channel and one unidirectional channel for those applications where a bidirectional clock is not required.

The ADuM2250/ADuM2251 contain hot swap circuitry to prevent data glitches 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 compared to optocouplers. The ADuM2250/ADuM2251 integrate iCoupler channels with semiconductor circuitry to enable a complete, isolated I2C interface provided in a small form factor.

Applications
  • Isolated I2C, SMbus, or PMBus Interfaces
  • Multilevel I2C interfaces
  • Power supplies
  • Networking
  • Power over Ethernet
Features and Benefits
  • 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
  • 16-lead SOIC wide body package version (RW-16)
  • 16-lead SOIC wide body enhanced creepage version (RI-16-2)
  • High temperature operation: 105°C
  • Safety and regulatory approvals
  • UL recognition: 5000 V rms for 1 minute per UL 1577
  • 5000 V rms for 1 minute per UL 1577
  • CSA Component Acceptance Notice 5A (RI-16-2 package)
Interface & Isolation
Reference Designs
Data Sheets
Documentnote
ADuM2250/ADuM2251: Hot-Swappable, Dual I2C Isolators, 5 kV Data Sheet (Rev. D)PDF 302 kB
Application Notes
Documentnote
AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices (Rev. C)PDF 406 kB
AN-913: Isolating I2C Interfaces (Rev. 0)PDF 280 kB
AN-727: iCoupler® Isolation in RS-485 Applications (Rev. 0)PDF 282 kB
AN-740: iCoupler® Isolation in RS-232 Applications (Rev. 0)PDF 716 kB
AN-770: iCoupler® Isolation in CAN Bus Applications (Rev. 0)PDF 234 kB
AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev. A)PDF 246 kB
AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev. 0)PDF 181 kB
Frequently Asked Questions
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADUM2251ARIZ Production16 ld SOIC (increased Creepage)OTH 37-40 to 105C3.132.77Y
ADUM2251ARIZ-RL Production16 ld SOIC (increased Creepage)REEL 1000-40 to 105C02.77Y
ADUM2251ARWZ Production16 ld SOIC - WideOTH 47-40 to 105C3.132.77Y
ADUM2251ARWZ-RL Production16 ld SOIC - WideREEL 1000-40 to 105C02.77Y
ADUM2251WARWZ Production16 ld SOIC - WideOTH 47-40 to 125C3.923.46Y
ADUM2251WARWZ-RL Production16 ld SOIC - WideREEL 1000-40 to 125C03.46Y
Reference Materials
ADuM2250/ADuM2251: Hot-Swappable, Dual I2C Isolators, 5 kV Data Sheet (Rev. D) adum2250
AN-0971: isoPower器件的辐射控制建议 (Rev. C) adum1233
AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices (Rev. C) ad7400
AN-793: iCoupler®隔离产品的ESD/闩锁考虑因素 (Rev. A) adum1233
AN-770: CAN总线应用中的iCoupler®隔离 (Rev. 0) adum1233
AN-740: RS-232应用中的Coupler® 隔离 (Rev. 0) adum1233
AN-727: RS-485应用中的iCoupler®隔离 (Rev. 0) adum1233
AN-913: I²C 接口的隔离 (Rev. 0) adum1233
AN-913: Isolating I2C Interfaces (Rev. 0) ad7400
AN-727: iCoupler® Isolation in RS-485 Applications (Rev. 0) ad7400
AN-740: iCoupler® Isolation in RS-232 Applications (Rev. 0) ad7400
AN-770: iCoupler® Isolation in CAN Bus Applications (Rev. 0) ad7400
AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev. A) ad7400
AN-825: iCoupler®隔离产品的电源考虑因素 (Rev. 0) adum1233
AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev. 0) ad7400
数字隔离器产品选型与资源指南 adum1233
Creepage Requirements for Medical Applications adm2682e
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with ad7400
NAppkin Note: Lowering the Power of the ADuM524x ad7400
High Speed Digital Isolators Using Microscale On-Chip Transformers adum1233
微变压器为混合动力汽车提供信号与电源隔离 adum1233
iCoupler® Products with isoPower™ Technology: Signal and Power Transfer... adum1233
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