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)
- High temperature operation: 105°C
- 16-lead SOIC wide body enhanced creepage version (RI-16-2)
- 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)
The ADuM2250 / ADuM2251 are hot swappable digital isolators with non-latching, 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.
- Isolated I2C, SMbus, or PMBus Interfaces
- Multilevel I2C interfaces
- Power supplies
- Power over Ethernet
Markets and Technologies
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)
The EVAL-ADuM1250EBZ supports two bidirectional channels for evaluation of isolated I2C interfaces in 8-lead SOIC packages. The evaluation board provides a JEDEC standard, 8-lead SOIC_N pad layout. This layout supports signal distribution, loopback, and loads referenced to the VDDx or GNDx planes, as well as optimal bypass capacitance. Signal sources can be conducted to the board through header pins or through edge mounted Sub- miniature Version A (SMA) connectors (SMA connectors must be ordered separately).
Screw terminal blocks on the evaluation board provide power connections. The board includes 200 mil (5.08 mm) header positions for compatibility with active probes (probe header pins must be ordered separately). The EVAL-ADuM1250EBZ evaluation board can be used to evaluate the ADuM1250, ADuM1251, ADuM2250, and ADuM2251 devices. Although the pad layout on the EVAL- ADuM1250EBZ does not support the ADuM2250 and ADuM2251 16-lead SOIC_W and SOIC_IC packages, these devices are functionally equivalent to the ADuM1250 and ADuM1251, respectively, for the purposes of evaluation. They differ only by package and isolation capabilities. Therefore, evaluations of the ADuM1250 and ADuM1251 can be applied to the ADuM2250 and ADuM2251 as well.
The evaluation board follows best printed circuit board (PCB) design practices for 4-layer boards, including a full power and ground plane on each side of the isolation barrier. No other electromagnetic interference (EMI) or noise mitigation design features are included on this evaluation board. For high speed operation, or when ultralow emissions are required, refer to the AN-1109 Application Note for additional evaluation board layout techniques.
Full specifications for the ADuM1250 are available in the ADuM1250 data sheet, which must be consulted in conjunction with User Guide UG-1100 when working with the evaluation board.
Documentation & Resources
AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices (Rev. C)2/14/2015
AN-913: Isolating I2C Interfaces (Rev. 0)6/20/2007
AN-727: iCoupler® Isolation in RS-485 Applications (Rev. 0)11/1/2006
AN-740: iCoupler® Isolation in RS-232 Applications (Rev. A)11/1/2006
AN-770: iCoupler® Isolation in CAN Bus Applications (Rev. 0)11/1/2006
AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev. A)11/1/2006
AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev. 0)11/1/2006
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary12/10/2010
NAppkin Note: Lowering the Power of the ADuM524x12/10/2010
Microtransformer Isolation Benefits Digital Control10/1/2008
Medical Devices Demand Stringent Isolation Techniques9/28/2006
High Speed Digital Isolators Using Microscale On-Chip Transformers9/1/2003
Reference Designs (1)
CN0388Isolated 600 Mbps, LVDS, 18-Bit, 5 MSPS Data Acquisition System
CN0388Isolated 600 Mbps, LVDS, 18-Bit, 5 MSPS Data Acquisition System
Features & Benefits
- 18-bit, 5MSPS Data Acquisition System
- Isolated LVDS Output
- 600Mbps Serial Data Capability
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|
|ADUM2251ARIZ||Material Declaration||Reliability Data||16-Lead SOIC (Increased Creepage)|
|ADUM2251ARIZ-RL||Material Declaration||Reliability Data||16-Lead SOIC (Increased Creepage)|
|ADUM2251ARWZ||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|ADUM2251ARWZ-RL||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|ADUM2251WARWZ||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|ADUM2251WARWZ-RL||Material Declaration||Reliability Data||16-Lead SOIC Wide|
|Wafer Fabrication Data|
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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.