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ADuM1250ARZ

ADIADuM1250ARZ

MPN: ADUM1250ARZ
Analog Devices Inc.
I2C Digital Isolator 2500Vrms 2 Channel 1Mbps 25kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
Active2,132 in stock
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Overview

The ADuM1250ARZ is a hot-swappable, digital isolator specifically designed for I2C, SMBus, and PMBus interfaces. It utilizes iCoupler technology to provide 2500Vrms isolation without the size and power limitations of optocouplers, supporting bidirectional data transfer at rates up to 1Mbps. The device is ideal for applications requiring galvanic isolation of clock and data lines while maintaining compatibility with standard open-drain interfaces.

Why Choose This Part

This device eliminates the need for external pull-up resistors on the isolated side for basic operation and supports 25kV/us common-mode transient immunity. It features low power consumption, operating at 2.8mA (5V) or 1.9mA (3.3V), and its 8-SOIC footprint offers a compact alternative to discrete optocoupler solutions.

Applications

Isolated I2C/SMBus Interfaces
Providing safe communication across high-voltage barriers in industrial systems and power supplies.
HEV/EV Battery Management Systems
Isolating communication between cell monitoring ICs and the central controller in automotive battery packs.
Power over Ethernet (PoE)
Managing data and power signals in networking equipment where ground loop prevention is critical.
Multilevel I2C Networking
Connecting multiple I2C buses with different voltage levels (3V to 5.5V) while providing electrical isolation.

Key Specifications

Type I2C
Data Rate 1Mbps
Technology Magnetic Coupling
Channel Type Bidirectional
Mounting Type Surface Mount
Isolated Power No
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 3V ~ 5.5V
Number of Channels 2
Voltage - Isolation 2500Vrms
Operating Temperature -40degC ~ 105degC
Inputs - Side 1/Side 2 2/2
Supplier Device Package 8-SOIC
Pulse Width Distortion (Max) 145ns, 85ns
Common Mode Transient Immunity (Min) 25kV/us

Getting Started

To evaluate the ADuM1250ARZ, engineers should ensure proper decoupling with 0.1uF capacitors on both VDD1 and VDD2 pins. Since the device is I2C-compatible, it can be integrated into any standard MCU toolchain such as STM32CubeIDE or Arduino; however, pay close attention to bus capacitance limits to maintain signal integrity at 1Mbps speeds.

Also Consider

ISO1540 TITexas Instruments - A pin-compatible I2C isolator that offers similar 2500Vrms isolation and bidirectional data channels.