GENERAL DESCRIPTION

The ADuM2250/ADuM22511 are hot swappable digital isolators with nonlatching, 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 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 performance, size, power consump-tion, and functional advantages compared to optocouplers. The ADuM2250/ADuM2251 integrate iCoupler channels with semi-conductor circuitry to enable a complete, isolated I2C interface in a small form factor package.

FEATURES

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

CSA Component Acceptance Notice 5A (RI-16-2 package)

IEC 60601-1: 250 V rms (reinforced)

IEC 60950-1: 400 V rms (reinforced)

VDE certificate of conformity

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

VIORM = 849 V peak

Qualified for automotive applications

APPLICATIONS

Isolated I2C, SMBus, or PMBus interfaces

Multilevel I2C interfaces

Power supplies

Networking

Power over Ethernet