ADUM1253AWA+

The ADuM1253 offers two open- drain channels, one unidirectional and one bidirectional for applications, such as I2C, that require data to be transmitted in both directions on the same line but have a unidirectional clock. To prevent latch- up action, side 1 outputs comprise special buffers that regulate the logic- low voltage at 0.64V and the input logic- low threshold is at least 50mV lower than the output logic- low voltage. Side 2 features conventional buffers that do not regulate logic- low output voltage. The ADuM1253 features independent 1.71V to 5.5V supplies on both side 1 and side 2 of the isolator. The device operates up to 2Mhz. The ultra- low standby current of 21μA per side is ideal for battery- operated systems. The ADuM1253 provides a disturbance- free bus connection for hot- plug connections on side 2 by first precharging the bus pins and then monitoring the bus state for either an idle bus or detection of a I2C stop condition before connecting side 1 and side 2. The ADuM1253 is available in both an 8- pin narrow- and wide- body SOIC package, and in an 8- pin MSOP package. The device is rated for operation at ambient temperatures of - 40°C to +125°C

Applications

• Isolated I2C/SMBus Interface
• Battery Management Systems
• Power Over Ethernet (PoE)
• Motor Control Systems

Key features

• Low VOL(MAX) for Greater I2C Device Compatibility
• Side 1: 0.69V
• Side 2: 0.4V
• Ultra-Low-Power Consumption for Longer Battery Life
• 142μA (typ) per Channel at 400kHz
• Wide Independent VDD1/VDD2 Supply Range Supports More Logic Voltage Levels and Allows Level Shifting
• 1.71V to 5.5V for Both Sides
• Hot-Swappable Side 2 I/O Prevents Data Corruption
• Initial Side 2 Connection Occurs at Bus Idle or Stop States
• Bidirectional I2C Transfer up to 2MHz SCL
• Strong Current Sinking Enables Lower RPUULLUP Values for Faster Bus Speeds
• Side 1: 5mA
• Side 2: 50mA
• Robust Galvanic Isolation of Digital Signals
• Continuously Withstands (ViOWM)
• 8-MSOP: 300 VRMS
• 8-Narrow SOIC: 445VRMS
• 8-Wide SOIC: 848 VRMS
• Withstands ±10kV Surge per IEC 61000-4-5
• 3 Package with Creepage and Clearance
• 8-MSOP: 3mm
• 8-Narrow SOIC: 4mm
• 8-Wide SOIC: 8mm
• Safety and Regulatory Approvals (Pending)
• IEC 60747-17 (Pending)
• Reinforced V1ORM Narrow SOIC: 630VPEAK
• Reinforced V1ORM Wide SOIC: 1200VPEAK
• UL 1577 (Pending)
• 8-Narrow SOIC: 3000 VRMS for 1min
• 8-Wide SOIC: 5000 VRMS for 1min
• IEC/EN/CSA 62368-1 (Pending)
• IEC/EN/CSA 61010-1 (Pending)
• CAN/CSA-C22.2 No. 14-18 (Pending)