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Product introduction

The ADuM1252 Bidirectional I2C isolator provides two bidirectional open leak channels for applications that require bidirectional data transmission over the same line, such as I2C. To prevent latching behavior, the first side output contains a special buffer that adjusts the logic low-level voltage to 0.64V, and the input logic low-level threshold is at least 50mV lower than the output logic low-level voltage. The second side has a traditional buffer that does not adjust the logic low-level output voltage.

The ADuM1252 has a 1.71V to 5.5V independent power supply on both the first and second sides of the isolator. The device operates at frequencies up to 2MHz. Each side provides an ultra-low standby current of 21μA, ideal for battery powered systems.

The ADuM1252 first precharges the bus pins, then monitors the bus status to find an idle bus or detect an I2C stop condition, and then connects side 1 and side 2 to provide a distract-free bus connection for the hot swappable connection on side 2.

Device: ADUM1252ASA

Type: Digital isolator

Applications: Isolated I2C/SMBus interface, battery management system, Power over Ethernet (PoE), motor control system.

Product features

Low VOL(MAX) enables higher I2C device compatibility

First side: 0.69V

Second side: 0.4V

Ultra-low power consumption extends battery life

142μA per channel at 400kHz (typical)

The wide independent VDD1/VDD2 power supply range supports more logical voltage levels and level switching

Both sides are 1.71V to 5.5V

Enhanced hot-swap second-side I/O

The initial 2-side connection occurs when the bus is idle or stopped to prevent data corruption

Two-way I2C data transmission up to 2MHz SCL

Bidirectional SCL for advanced bus topologies

Supports clock extension across isolation grids and multiple controllers

The strong current filling capability reduces the RPULL-UP value for faster bus speeds

First side: 5mA

Second side: 50mA

Robust electrical isolation for digital signals

Sustainable Tolerance (VIOWM)

8-pin narrow-body SOIC: 445VRMS

Can withstand ±10kV surge, in line with IEC 61000-4-5 standards

Creepage distance and electrical clearance

8-pin narrow body SOIC: 4mm

Safety and Regulatory Certification (pending application)

IEC60747-17 (Pending Application)

Enhanced VIORM Narrow Body SOIC: 630VPEAK

UL 1577 (pending application)

8-pin narrow-body SOIC: 3000VRMS per minute

IEC/EN/CSA 62368-1 (pending application)

IEC/EN/CSA 61010-1 (pending application)

CAN/CSA-C22.2 No. 14-18 (Pending application)

Shenzhen Mingjiada Electronics Co., LTD. (Supply, recycling) ADUM1252ASA ultra-low power consumption, bidirectional I2C isolator.

If you need, please contact us:

Tel: +8613410018555

Email: sales@hkmjd.com

Official website: www.hkmjd.com