This document introduces Analog Devices' new portfolio of SPI digital isolators based on their iCoupler digital isolator technology. It provides an overview of Analog Devices' dedicated SPI isolator products, including small package sizes, multiple slave control and high speed operation. It also summarizes the benefits of migrating from optocoupler-based or discrete component-based SPI isolation solutions to Analog Devices' SPI isolator integrated circuits.

1. The World Leader in High Performance Signal Processing Solutions
Dedicated Digital
Isolator for SPI Communications
Based on iCoupler® Digital Isolator Technology
www.analog.com/SPIsolator
June 2014
®

2. ADI has your SPI Bus Covered with a New
Portfolio of SPI Digital Isolators
2 www.analog.com/SPIsolator

3. Dedicated SPI Isolators
Small Footprint, Simple Design, Fast Speed, High Data Integrity
 Small Package
 20-lead SSOP with 3.75kV Isolation rating
 Multiple Slave Control Options
 High Speed (Up to 40MHz)
 Low Propagation Delay
 Extended Temperature Range to 125°C
 Proven iCoupler Isolation (>1 Billion Channels Shipped)
 UL, CSA, VDE regulatory approvals (Pending)
 Serves Variety of Applications
 Control (PLC, Automotive, etc.)
 High Data Integrity; Multiple Slaves; Auxiliary Data Lines
 Sensor Monitoring (Instrumentation, Motor Control, etc.)
 High Data Rates; Tight Timing Control; Single Slave; Auxiliary Data Lines
3 www.analog.com/SPIsolator

4. Optocoupler to SPIsolator Migration
4
iCoupler SolutionOptocoupler Solution
Optocoupler SPIsolator
Components 33 3
Area 816 mm2 108 mm2
Cost $16.11 $2.80
(10K OEM pricing)
3.75 kVrms Withstand
17Mhz
www.analog.com/SPIsolator

5. Digital Isolator to SPIsolator Migration
5
iCoupler SolutionDigital + Opto Solution
Digital + Opto SPIsolator
Components 18 3
Area 595 mm2 108 mm2
Cost $4.83 $2.80
www.analog.com/SPIsolator
(10K OEM pricing)
3.75 kVrms Withstand
17Mhz

6. ADuM315x Block Diagrams
www.analog.com/SPIsolator6
Common Low-Latency,
High Speed SPI Path
Different Integrated
Low-Speed
Channel Configurations
Retimed
Clock

7. ADuM3150 SPI Digital Isolator
Enables High Bus Speed
www.analog.com/SPIsolator
 Supports up to 40MHz SPI Clock
 Delayed SCLK generated by SPIsolator based on SCLK
 Factory calibrated
 Requires additional MCU register
 Standard SPI port or GPIOs + shift register
 Fastest systems today perform this function discretely
7

8. ADuM3151/2/3 SPI Digital Isolator
Functional Integration Reduces Size and Cost
 Supports 17MHz Clock
 3 Auxiliary Low-Speed Channels
 Integrates isolation of auxiliary/control signals
www.analog.com/SPIsolator8

9. ADuM3154 SPI Digital Isolator
Quad Slave Select Feature Simplifies Board Layout
 Supports 17MHz Clock
 4 Slave Select Lines
 2 Pins to Address the Slave Select Mux on Slave Side
 Slave Select gated by fast SS channel for accurate timing
www.analog.com/SPIsolator9

10. SPIsolator™ Selection Guide
ADuM315x released now! ADuM415x to be released in September.

11. Compatible with All SPI Converters
11
For more information on our precision converter products, visit: www.analog.com/adc
ADC Model
Resolution
(Bits)
ADC
Sample Rate
(Msps)
SPIsolator
Throughput
(Msps)
AD7984 18 1.33 1.05
AD7982 18 1.00 0.86
AD7690 18 0.40 0.39
AD7691* 18 0.25 0.25
AD7983 16 1.33 1.11
AD7980 16 1.00 0.90
AD7902 16 1.00 0.90
AD7903 16 1.00 0.90
AD7693* 16 0.50 0.50
AD7699* 16 0.50 0.50
AD7606-4* 16 0.20 0.20
AD7091R* 12 1.00 1.00
AD7091R-2* 12 1.00 1.00
AD7091R-4* 12 1.00 1.00
AD7091R-8* 12 1.00 1.00
Here are the latest 12-bit to 18-bit Precision ADCs
* Maximum ADC Throughput Supported

12. SPIsolator™ Family Resources
www.analog.com/SPIsolator
Training Video
Evaluation Boards
EVAL-ADUM3150Z
EVAL-ADUM3151Z
EVAL-ADUM3154Z
Product Data Sheets
•ADuM3150
•ADuM3151/2/3
•ADuM3154
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• Access to all data channels
• Multiple Connection Options
• Support forTektronixActive Probes
• Provision for cable terminations
• Support for PCB edge mounted coax connectors
• Easy Configuration
Evaluate for
$49 USD

13. Learn More About iCoupler Digital Isolators
www.analog.com/iCoupler
Resources Include:
 Webcast and Training videos
 Interface and Isolation Newsletter Archives and Subscription Link
 Circuits from the Lab™
 Application Notes
 Technical Articles
 Digital Isolator Product Selector Guide 
 Regulatory Agency Certifications
 Datasheets
 Evaluation Boards
And Much More!
www.analog.com/SPIsolator13