1 kV, Dual Channel Digital Isolators

Data Sheet

ADuM7240/ADuM7241

Rev. A

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FEATURES

Narrow-body, RoHS-compliant, 8-lead SOIC

Safety and regulatory approvals

UL recognition (pending)

UL 1577: 1000 V rms for 1 minute

Low power operation

5 V operation

2.4 mA per channel maximum at 0 Mbps to 1 Mbps

11.8 mA per channel maximum at 25 Mbps

3.3 V operation

1.7 mA per channel maximum at 0 Mbps to 1 Mbps

8.2 mA per channel maximum at 25 Mbps

Bidirectional communication

Up to 25 Mbps data rate (NRZ)

3 V/5 V level translation

High temperature operation: 105°C

High common-mode transient immunity: >15 kV/μs

APPLICATIONS

General-purpose multichannel isolation

Data converter isolation

Industrial field bus isolation

FUNCTIONAL BLOCK DIAGRAMS

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ADuM7240

Figure 1. ADuM7240

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ADuM7241

Figure 2. ADuM7241

GENERAL DESCRIPTION

The ADuM7240/ADuM72411 are dual channel digital isolators

based on the Analog Devices, Inc., iCoupler® technology.

Combining high speed CMOS and monolithic air core trans-

former technologies, these isolation components provide

outstanding performance characteristics superior to the alterna-

tives, such as optocoupler devices and other integrated couplers.

The ADuM7240/ADuM7241 dual 1 kV digital isolation devices

are packaged in a narrow-body 8-lead SOIC. The ADuM7240/

ADuM7241 offer a cost-effective option compared to 2.5 kV or

5 kV isolators where only functional isolation is needed.

Like other Analog Devices isolators, the ADuM7240/ADuM7241

offer very low power consumption, consuming one-tenth to

one-sixth the power of comparable isolators at data rates up to

25 Mbps. Despite the low power consumption, all models of the

ADuM7240/ADuM7241 provide low pulse width distortion

(<5 ns for C grade). In addition, every model has an input glitch

filter to protect against extraneous noise disturbances.

The ADuM7240/ADuM7241 provide two independent

isolation channels and are available in two channel configura-

tions with 1 Mbps or 25 Mbps data rates (see the Ordering

Guide). All models operate with the supply voltage on either

side ranging from 3.0 V to 5.5 V, providing compatibility with

lower voltage systems as well as enabling voltage translation

functionality across the isolation barrier. The ADuM7240/

ADuM7241 also have an output default high logic state in the

absence of input power.

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Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.