5 kV, 7-Channel,

SPIsolator Digital Isolators for SPI

Data Sheet

ADuM4151/ADuM4152/ADuM4153

FEATURES

Supports up to 17 MHz SPI clock speed

4 high speed, low propagation delay, SPI signal isolation

channels

Three 250 kbps data channels

20-lead SOIC_IC package with 8.3 mm creepage

High temperature operation: 125°C

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

Safety and regulatory approvals

UL recognition per UL 1577

5000 V rms for 1 minute SOIC long package

CSA Component Acceptance Notice 5A

VDE certificate of conformity

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

APPLICATIONS

Industrial programmable logic controllers (PLCs)

Sensor isolation

GENERAL DESCRIPTION

The ADuM4151/ADuM4152/ADuM41531 are 7-channel,

SPIsolator™ digital isolators optimized for isolated serial peripheral

interfaces (SPIs). Based on the Analog Devices, Inc., iCoupler®

chip scale transformer technology, the low propagation delay in

the CLK, MO/SI, MI/SO, and SS SPI bus signals supports SPI

clock rates of up to 17 MHz. These channels operate with 14 ns

propagation delay and 1 ns jitter to optimize timing for SPI.

The ADuM4151/ADuM4152/ADuM4153 isolators also provide

three additional independent low data rate isolation channels in

three different channel direction combinations. Data in the slow

channels is sampled and serialized for a 250 kbps data rate with

up to 2.5 µs of jitter in the low speed channels.

FUNCTIONAL BLOCK DIAGRAMS

ENCODE

CONTROL

BLOCK

DECODE

DECODE

ENCODE

ENCODE

DECODE

ENCODE

DECODE

MCLK

MO

MI

MSS

SCLK

SI

SO

SSS

1

2

3

4

5

6

7

8

20

19

18

17

16

15

14

13

9

10

12

11

ADuM4151

CONTROL

BLOCK

Figure 1. ADuM4151 Functional Block Diagram

ENCODE

DECODE

DECODE

ENCODE

ENCODE

DECODE

ENCODE

DECODE

MCLK

MO

MI

MSS

SCLK

SI

SO

SSS

1

2

3

4

5

6

7

8

20

19

18

17

16

15

14

13

9

10

12

11

ADuM4152

CONTROL

BLOCK

CONTROL

BLOCK

Figure 2. ADuM4152 Functional Block Diagram

ENCODE

DECODE

DECODE

ENCODE

ENCODE

DECODE

ENCODE

DECODE

MCLK

MO

MI

MSS

SCLK

SI

SO

SSS

1

2

3

4

5

6

7

8

20

19

18

17

16

15

14

13

9

10

12

11

ADuM4153

CONTROL

BLOCK

CONTROL

BLOCK

Figure 3. ADuM4153 Functional Block Diagram

1

Protected by U.S. Patents 5,952,849; 6,873,065; 6,262,600; and 7,075,329. Other patents are pending.

Rev. A

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