GENERAL DESCRIPTION

The ADuM2280/ADuM2281/ADuM2285/ADuM22861 (also

referred to as ADuM228x in this data sheet) are 5 kV rms dualchannel

digital isolators based on Analog Devices, Inc., iCoupler?

technology. Combining high speed CMOS and monolithic air

core transformer technology, these isolation components

provide outstanding performance characteristics superior to

alternatives, such as optocoupler devices and other integrated

couplers.

With propagation delay at 24 ns maximum, pulse width

distortion is less than 2 ns for C grade. Channel-to-channel

matching is tight at 5 ns for C grade. The ADuM228x are

available in two channel configurations with three different

data rates up to 100 Mbps (see the Ordering Guide). All models

operate with the supply voltage on either side ranging from

2.7 V to 5.5 V, providing compatibility with lower voltage

systems as well as enabling a voltage translation functionality

across the isolation barrier. Unlike other optocoupler

alternatives, the ADuM228x isolators have a patented refresh

feature that ensures dc correctness in the absence of input logic

transitions. When power is first applied or is not yet applied to

the input side, the ADuM2280 and ADuM2281 have a default

high output and the ADuM2285 and ADuM2286 have a default low output.

FEATURES

High isolation voltage: 5000 V rms

Up to 100 Mbps data rate

Low propagation delay: 24 ns maximum

Low dynamic power consumption

Bidirectional communication

3 V to 5 V level translation

High temperature operation: 125°C

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

Default high output: ADuM2280/ADuM2281

Default low output: ADuM2285/ADuM2286

16-lead SOIC wide body enhanced creepage package

Safety and regulatory approvals (pending)

UL recognition: 5000 V rms for 1 minute per UL 1577

CSA Component Acceptance Notice #5A

IEC 60601-1: 250 V rms (reinforced)

IEC 60950-1: 400 V rms (reinforced)

VDE Certificate of Conformity

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

VIORM = 846 V peak

Pin-compatible with ADuM220x and ADuM221x families

APPLICATIONS

General-purpose, high voltage, multichannel isolation

Medical equipment

Power supplies

RS-232/RS-422/RS-485 transceiver isolation