Overview
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
- 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
Product Details
The ADuM1250/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 ADuM1250 provides two bidirectional channels, supporting a complete isolated I2C interface. The ADuM1251 provides one bidirectional channel and one unidirectional channel for applications where a bidirectional clock is not required.
Both the ADuM1250 and 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 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
- Hybrid electric vehicle battery management
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices (Rev. C)2/14/2015
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AN-913: Isolating I2C Interfaces (Rev. 0)6/20/2007
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AN-727: iCoupler® Isolation in RS-485 Applications (Rev. 0)11/1/2006
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AN-740: iCoupler® Isolation in RS-232 Applications (Rev. A)11/1/2006
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AN-770: iCoupler® Isolation in CAN Bus Applications (Rev. 0)11/1/2006
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AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev. A)11/1/2006
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AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev. 0)11/1/2006
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FAQs7/26/2017
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Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary12/10/2010
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NAppkin Note: Lowering the Power of the ADuM524x12/10/2010
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Microtransformer Isolation Benefits Digital Control10/1/2008
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Cooking Inductively: ADI iCoupler Technology Isolates the Hob and the User Interface3/1/2008 Analog Dialogue
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Digital Isolation Offers Compact, Low-Cost Solutions to Challenging Design Problems12/1/2006 Analog Dialogue
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Medical Devices Demand Stringent Isolation Techniques9/28/2006
Tools & Simulations
IBIS Models
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ADUM1251ARZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| ADUM1251ARZ-RL7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| ADUM1251WARZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| ADUM1251WARZ-RL7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| Wafer Fabrication Data |
PCN-PDN Information
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Sample & Buy
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Lead Times
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Sampling
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.