Data Sheet
Hot Swappable, Dual I2C Isolators ADuM1250/ADuM1251
FEATURES
Bidirectional I2C communication Open-drain int...
Data Sheet
Hot Swappable, Dual I2C Isolators ADuM1250/ADuM1251
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
APPLICATIONS
Isolated I2C, SMBus, or PMBus interfaces Multilevel I2C interfaces Power supplies Networking Power over Ethernet Hybrid electric vehicle battery management
GENERAL 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.
06113-001
FUNCTIONAL BLOCK DIAGRAMS
VDD1 1 SDA1 2 SCL1 3 GND1 4
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Figure 1. ADuM1250
8 VDD2 7 SDA2 6 SCL2 5 GND2
VDD1 1 SDA1 2 SCL1 3 GND1 4
DECODE ENCO...