ADUM2250:  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