Hot Swappable Dual IC Isolator

The ADuM1250 / ADuM1251 are hot swappable digital isolators with non-latching, 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

* Hybrid electric vehicle battery management

* 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