ADM3260 Hot Swappable, Dual I2C Isolators with Integrated DC-to-DC Converter

Based on the iCoupler® and isoPower® chip scale transformer technology, the ADM3260 is a hot swappable digital and power isolator with two nonlatching, bidirectional communication channels, supporting a complete isolated I2C interface, and an integrated isolated dc-to-dc converter, supporting up to 150 mW of isolated power conversion.

iCoupler is a chip scale transformer technology with functional, performance, size, and power consumption advantages as compared to optocouplers. The bidirectional I2C channels eliminate the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers.

Based on the Analog Devices, Inc., isoPower technology, the on-chip isolated dc-to-dc converter provides a regulated, isolated voltage of 3.15 V to 5.25 V with up to 150 mW of output power.

With the ADM3260, the iCoupler and isoPower channels, along with the I2C transceivers, can be integrated with semiconductor circuitry, which enables a complete isolated I2C interface and allows the power converter to be implemented in a small form factor. The ADM3260 is available in 20-lead SSOP package and has an operating temperature range of −40°C to+105°C.

isoPower uses high frequency switching elements to transfer power through its transformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. See the AN-0971 Application Note for board layout recommendations

Applications

Features and Benefits

isoPower integrated, isolated dc-to-dc converter

Regulated 3.15 V to 5.25 V output

Up to 150 mW output power

High common-mode transient immunity: >25 kV/μs

iCoupler integrated I²C digital isolator

Bidirectional I2C communication

3.0 V to 5.5 V supply/logic levels

Open-drain interfaces

Suitable for hot swap applications

30 mA current sink capability

1000 kHz maximum frequency

20-lead SSOP package with 5.3 mm creepage

High temperature operation: 105°C

See data sheet for additional features

Interface & Isolation

Isolated I2C Isolators

Data Sheets

Document	note
ADM3260: Hot Swappable, Dual I2C Isolators with Integrated DC-to-DC Converter Data Sheet (Rev. C)	PDF 488.97 K

Application Notes

Document	note
AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices (Rev. C)	PDF 406 kB

User Guides

Document	note
UG-724: Simple I2C and Power Isolation with ADM3260	PDF 306.93 K
UG-666: Evaluating the ADM3260 Hot Swappable Dual I2C Isolators with Integrated DC-to-DC Converter	PDF 258 kB