Hot Swappable, Dual I2C Isolators
Description
The ADuM1250/ADuM12511 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 ADuM1250 provides two bidirectional channels, supporting a complete isolated I2C interface. The ADuM1251 provides one bidirectional channel and one unidirectional channel for applications where a bidirectional clock is not required. Both the ADuM1250 and the ADuM1251 contain hot swap circuitry to prevent glitching data when an unpowered card is inserted onto an active bus. These isolators are based on the 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.
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, RoHS compliant SOIC package
• High temperature operation: 125°C
• Qualified for automotive applications Safety and regulatory approvals
- UL recognition 2500 V rms for 1 minute per UL 1577
- CSA Component Acceptance Notice 5A
- VDE certificate of conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 560 V peak
