ADUM1252AUA+

ADUM1252AUA+ is an ultra-low power, bidirectional I2C isolator with extended VDD, idle-bus hot-swap and low VOL. It offers two bidirectional, open-drain channels for applications, such as I2C, that require data to be transmitted in both directions on the same line. 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 ADuM1252 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 an I2C stop condition before connecting side 1 and side 2. Key applications include isolated I2C/SMBus interface, battery management systems, Power over Ethernet (PoE), and motor control systems.

• Wide independent VDD1/VDD2 supply range supports more logic voltage levels and allows level shifting
• 1.71V to 5.5V for both sides
• Bidirectional I2C data transfer up to 2MHz SCL
• Bidirectional SCL for advanced bus topologies
• Supports clock stretching and multiple controllers across isolation barrier
• Withstands ±10kV surge per IEC 61000-4-5
• Common-mode transient immunity is 200kV/µs minimum
• Leakage current is +10µA max at SDA1/SCL1 =5.5V, VDD1 = 0V, device unpowered
• 8 MSOP package
• Temperature range from -40 to 125°C