Digital isolators configured for SPI communications links

June 25, 2014 // By Graham Prophet
Based on ADI’s iCoupler digital isolator technology, the ADuM315x SPIsolator family delivers six times the clock speed at as little as 1/5th the area and cost of competing optocoupler and digital isolator solutions.

Analog Devices has added a family of digital isolator devices optimised for serial peripheral interface (SPI) communications systems. The ADuM315x SPIsolator digital isolator family handles up to 40-MHz SPI clock speeds, making these digital isolators over six times faster, over 80% smaller and as much as 85% less expensive than competing optocoupler- or digital isolator-based solutions. Faster SPI clock speeds enable higher throughout in data acquisition systems, allowing for higher performance and more rapid system response times. A high level of functional integration provides system designers with a simple solution for isolating high-speed SPI signals along with commonly required low-speed status and control signals in a single package.

The ADuM315x family supports a range of high-data-rate, SPI communications applications including distributed control systems, programmable logic controllers, and sensor monitors used in industrial automation, instrumentation equipment and motor controls.

Product

Sample Availability

Price Each per 1,000

Package

ADuM3150A

July

$3.10

20-lead SSOP

ADuM3151A

July

$2.15

20-lead SSOP

ADuM3152A

July

$2.15

20-lead SSOP

ADuM3153A

July

$2.15

20-lead SSOP

ADuM3154A

July

$2.15

20-lead SSOP

ADuM3150B

July

$3.10

20-lead SSOP

ADuM3151B

July

$2.80

20-lead SSOP

ADuM3152B

July

$2.80

20-lead SSOP

ADuM3153B

July

$2.80

20-lead SSOP

ADuM3154B

July

$2.80

20-lead SSOP

Product

Availability

Price Each

Package

EVAL-ADUM3150Z

Now

$49

Evaluation Board

EVAL-ADUM3151Z

Now

$49

Evaluation Board

EVAL-ADUM3154Z

Now

$49

Evaluation Board

A video is at www.analog.com/SPIsolatorVideo

Analog Devices; www.analog.com/SPIsolator