Quad-Channel, Digital Isolators,

Enhanced System-Level ESD Reliability

Data Sheet

ADuM3400/ADuM3401/ADuM3402

Rev. B

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FEATURES

Enhanced system-level ESD performance per IEC 61000-4-x

Low power operation

5 V operation

1.4 mA per channel maximum @ 0 Mbps to 2 Mbps

4.3 mA per channel maximum @ 10 Mbps

34 mA per channel maximum @ 90 Mbps

3 V operation

0.9 mA per channel maximum @ 0 Mbps to 2 Mbps

2.4 mA per channel maximum @ 10 Mbps

20 mA per channel maximum @ 90 Mbps

Bidirectional communication

3 V/5 V level translation

High temperature operation: 105°C

High data rate: dc to 90 Mbps (NRZ)

Precise timing characteristics

2 ns maximum pulse width distortion

2 ns maximum channel-to-channel matching

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

Output enable function

16-lead SOIC wide body, RoHS-compliant package

Safety and regulatory approvals

UL recognition: 2500 V rms for 1 minute per UL 1577

CSA Component Acceptance Notice #5A

VDE Certificate of Conformity

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

APPLICATIONS

General-purpose multichannel isolation

SPI/data converter isolation

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

Industrial field bus isolation

GENERAL DESCRIPTION

The ADuM340x1 are 4-channel digital isolators based on the

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.

iCoupler devices remove the design difficulties commonly

associated with optocouplers. Typical optocoupler concerns

regarding uncertain current transfer ratios, nonlinear transfer

functions, and temperature and lifetime effects are eliminated

with the simple iCoupler digital interfaces and stable performance

characteristics. The need for external drivers and other discrete

components is eliminated with these iCoupler products. Further-

more, iCoupler devices consume one-tenth to one-sixth the

power of optocouplers at comparable signal data rates.

The ADuM340x isolators provide four independent isolation

channels in a variety of channel configurations and data rates

(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. The

ADuM340x isolators have a patented refresh feature that ensures dc

correctness in the absence of input logic transitions and during

power-up/power-down conditions.

In comparison to the ADuM140x isolators, the ADuM340x

isolators contain various circuit and layout changes to provide

increased capability relative to system-level IEC 61000-4-x testing

(ESD/burst/surge). The precise capability in these tests for either

the ADuM140x or ADuM340x products is strongly determined

by the design and layout of the user’s board or module. For more

information, see the AN-793 Application Note, ESD/Latch-Up

Considerations with iCoupler Isolation Products.

FUNCTIONAL BLOCK DIAGRAMS

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Figure 1. ADuM3400 Functional Block Diagram

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Figure 2. ADuM3401 Functional Block Diagram

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Figure 3. ADuM3402 Functional Block Diagram