ADUM1250ARZ-RL7

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

8-lead SOIC lead-free package

High temperature operation: 105°C

Safety and regulatory approvals

UL recognition

2500 V rms for 1 minute per UL 1577

CSA Component Acceptance Notice #5A (pending)

VDE Certificate of Conformity (pending)

DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01

DIN EN 60950 (VDE 0805): 2001-12; DIN EN 60950: 2000

VIORM = 560 V peak

APPLICATIONS

Isolated I2C, SMBus, or PMBus interfaces

Multilevel I2C interfaces

Power supplies

Networking

Power-over-Ethernet 

GENERAL DESCRIPTION

The ADuM1250/ADuM12511

 are hot swappable digital

isolators with non latching bidirectional communication

channels compatible with I2

C interfaces. This eliminates the

need for splitting I2

C signals into separate transmit and receive

signals for use with standalone optocouplers.

The ADuM1250 provides two bidirectional channels

supporting a complete isolated I2

C 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 I2

C interface to be provided in a small

form factor. 

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