FEATURES                                                                                             FUNCTIONAL BLOCK DIAGRAMS

isoPower integrated, isolated dc-to-dc converter                             

Regulated 3.3 V or 5 V output

Up to 500 mW output power

Quad dc-to-25 Mbps (NRZ) signal isolation channels

Schmitt trigger inputs

16-lead SOIC package with 7.6 mm creepage

High temperature operation: 105°C

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

Safety and regulatory approvals (pending)

    UL recognition

        5000 V rms for 1 minute per UL1577

    CSA Component Acceptance Notice #5A

        IEC 60950-1: 600 V rms (reinforced)

        IEC 60601-1: 250 V rms (reinforced)

    VDE certificate of conformity

        DIN V VDE V 0884-10 (VDE V 0884-10):2006-12                              

        V_IORM = 560 V peak

APPLICATIONS

RS-232/RS-422/RS-485 transceivers

Medical isolation

AC/dc power supply startup bias and gate drives

Isolated sensor interface

GENERAL DESCRIPTION

The ADuM640x¹ devices are quad-channel digital isolators with

isoPower®, an integrated, isolated dc-to-dc converter. Based on

the Analog Devices, Inc., iCoupler® technology, the dc-to-dc

converter provides up to 500 mW of regulated, isolated power at

either 5.0 V or 3.3 V from a 5.0 V input supply, or 3.3 V from a

3.3 V supply at the power levels shown in Table 1. This eliminates

the need for a separate, isolated dc-to-dc converter in low power,

isolated designs. The iCoupler chip scale transformer technology

is used to isolate the logic signals and for the magnetic components

of the dc-to-dc converter. The result is a small form factor, total

isolation solution.

The ADuM640x isolators provide four independent isolation

channels in a variety of channel configurations and data rates

(see the Ordering Guide for more information).

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. Refer to the AN-0971 application note for board

layout recommendations at www.analog.com.