Quad-Channel Digital Isolators, 5KV

Preliminary Technical Data

ADuM2400/ADuM2401/ADuM2402

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FEATURES

Low power operation

5 V operation:

1.0 mA per channel max @ 0–2 Mbps

3.5 mA per channel max @ 10 Mbps

31 mA per channel max @ 90 Mbps

3 V operation:

0.7 mA per channel max @ 0–2 Mbps

2.1 mA per channel max @ 10 Mbps

20 mA per channel max @ 90 Mbps

Bidirectional communication

3 V/5 V level translation

High temperature operation: 105°C

High data rate: DC–90 Mbps (NRZ)

Precise timing characteristics:

2 ns max. pulsewidth distortion

2 ns max. channel-to-channel matching

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

Output enable function

Wide body SOIC 16-lead package

Safety and regulatory approvals (pending)

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

CSA component acceptance notice #5A

VDE certificate of conformity

DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01

DIN EN 60950 (VDE 0805):2001-12;EN 60950:2000

IEC 60601-1

APPLICATIONS

General-purpose, high voltage, multichannel isolation

Medical Equipment

Motor Drives

Power Supplies

GENERAL DESCRIPTION

The ADuM240x are four-channel digital isolators based on

Analog Devices’ 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. In comparison to the 2.5KV ADuM140x product

family, ADuM240x models have increased insulation thickness

to achieve the higher 5.0KV isolation rating.

By avoiding the use of LEDs and photodiodes, iCoupler devices

remove the design difficulties commonly associated with

optocouplers. The 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 discretes

is eliminated with these iCoupler products. Furthermore,

iCoupler devices run at one-tenth to one-sixth the power

consumption of optocouplers at comparable signal data rates.

The ADuM240x isolators provide four independent isolation

channels in a variety of channel configurations and data rates (see

Ordering Guide). All ADuM240x models operate with the supply

voltage of 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. In

addition, the ADuM240x provides low pulse width distortion (<2

ns for CRWZ grade), and tight channel-to-channel matching (<2

ns for CRWZ grade). Unlike other optocoupler alternatives, the

ADuM240x isolators have a patented refresh feature that ensures

dc correctness in the absence of input logic transitions and during

power-up/power-down conditions.

FUNCTIONAL BLOCK DIAGRAMS

ENCODE

DECODE

ENCODE

DECODE

ENCODE

DECODE

ENCODE

DECODE

NC

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

Figure 1. ADuM2400 Functional Block Diagram

16

15

10

9

DECODE

ENCODE

3

14

DECODE

ENCODE

4

13

DECODE

ENCODE

6

11

ENCODE

DECODE

12

Figure 2. ADuM2401 Functional Block Diagram

DECODE

DECODE

ENCODE

ENCODE

ENCODE

DECODE

ENCODE

DECODE

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

Figure 3. ADuM2402 Functional Block Diagram