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ADUM3471:  Isolated Switching Regulators (3/1 Channel Directionality)

Product Details

Product Status:Recommended for New Designs

The ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 devices are quad-channel, digital isolators with an integrated PWM controller and transformer driver for an isolated DC/DC converter. Based on the Analog Devices, Inc., iCoupler® technology, the DC/DC converter provides up to 2 W of regulated, isolated power at 3.3 V to 24 V from a 5.0 V input supply or from a 3.3 V supply. This eliminates the need for a separate, isolated DC/DC converter in 2 W isolated designs. The iCoupler chip-scale transformer technology is used to isolate the logic signals, and the integrated transformer driver with isolated secondary side control provides higher efficiency for the isolated DC/DC converter. The result is a small form factor, total isolation solution.

The ADuM347x isolators provide four independent isolation channels in a variety of channel configurations and data rates.

Applications

  • RS-232/RS-422/RS-485 transceivers
  • Industrial field bus isolation
  • Power supply startup bias and gate drives
  • Isolated sensor interfaces
  • Process controls

FEATURES and BENEFITS

  • Isolated PWM Controller
  • Integrated transformer driver
  • Regulated adjustable output: 3.3 V to 24 V
  • 2 W output power
  • 70% efficiency at guaranteed load of 400 mA at 5.0 V output
  • Quad dc-to-25 Mbps (NRZ) signal isolation channels
  • 20-lead SSOP package
  • High temperature operation: 105°C
  • High common-mode transient immunity: >25 kV/μs
  • 200 kHz to 1 MHz adjustable oscillator frequency
  • Soft start function at power-up
  • Pulse-by-pulse overcurrent protection
  • Thermal shutdown
  • 2500 V rms isolation
  • Evaluation Board available
  • Automotive Qualified

Functional Block Diagram for ADuM3471

Documentation

Title Content Type File Type
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474: PWM Controller and Transformer Driver with Quad-Channel Isolators Data Sheet (Rev B, 05/2014) (pdf, 741 kB) Data Sheets PDF
CN0292: Completely Isolated, Robust, 4-Channel, Multiplexed Data Acquisition System for Industrial Level Signals  (pdf, 500 kB) Circuit Note PDF
CN0278: Complete 4 mA to 20 mA HART Solution with Additional Voltage Output Capability  (pdf, 442 kB) Circuit Note PDF
CN-0254: Low Cost, 16-Bit, 250 kSPS, 8-Channel, Isolated Data Acquisition System  (pdf, 394 kB) Circuit Note PDF
CN-0321: Fully Isolated, Single Channel Voltage and 4 mA to 20 mA Output with HART Connectivity  (pdf, 282 kB) Circuit Note PDF
CN-0233: 16-Bit Isolated Industrial Voltage and Current Output DAC with Isolated DC-to-DC Supplies  (pdf, 197 kB) Circuit Note PDF
ADuM347x Isolated DC/DC Controller Overview
(Digi-Key Corporation)
Videos HTML
ADuM347x: Quad-Channel Digital Isolator with PWM Controller
iCoupler® Digital Isolator by Analog Devices. The ADuM347x is the industry's first digital isolator with an integrated transformer driver and PWM (pulse-width-modulation) controller in a sigle package.
Videos HTML
Solving Isolation Challenges in Power Conversion Applications
This webcast will present solutions to isolation challenges in power conversion applications. Among the topics to be discussed are the limitations of traditional methods of isolation (such as utilization of optocouplers and pulse transformers) vs. more efficient and cost effective solutions that utilize digital isolators. If you are currently using optocouplers and pulse transformers, this is a webcast you should attend.
Webcasts WEBCAST
UG-197: iCoupler ADuM347x Quad-Channel Isolators with Integrated Transformer Driver  (pdf, 653 kB) User Guides PDF
Inside iCoupler® Technology: ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary  (pdf, 0)
By Flow Zhao, Design Engineer
Technical Articles PDF
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary  (pdf, 291 kB)
By Flow Zhao, Design Engineer
Technical Articles PDF
NAppkin Note: Lowering the Power of the ADuM524x  (pdf, 223 kB)
By Mark Cantrell, Senior Applications Engineer
Technical Articles PDF
Digital Isolator Product Selection and Resource Guide  (pdf, 640 kB) Product Selection Guide PDF
Analog Devices Achieves Major Milestone by Shipping 1 Billionth Channel of iCoupler Digital Isolation (19 Sep 2013) Press Releases HTML
ADuM347x Family: PWM Controller and Transformer Drivers with Quad-Channel Isolators Overview HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

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Price, packaging, availability

ADUM3471 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADUM3471ARSZ Status: Production 20 ld SSOP 20 Ind Tube, 66 $3.32 $2.88 Y  Material Info PCN Purchase Sample
ADUM3471ARSZ-RL7 Status: Production 20 ld SSOP 20 Ind Reel, 500 - $2.88 Y  Material Info PCN Purchase
ADUM3471CRSZ Status: Production 20 ld SSOP 20 Ind Tube, 66 $4.53 $3.93 Y  Material Info PCN Purchase Sample
ADUM3471CRSZ-RL7 Status: Production 20 ld SSOP 20 Ind Reel, 500 - $3.93 Y  Material Info PCN Purchase
ADUM3471WARSZ Status: Production SSOP 5.3 MM 20 Auto Tube, 66 - - Y  Material Info PCN Sample
ADUM3471WARSZ-RL7 Status: Production SSOP 5.3 MM 20 Auto Reel, 500 - - Y  Material Info PCN Contact ADI
ADUM3471WCRSZ Status: Production SSOP 5.3 MM 20 Auto Tube, 66 - - Y  Material Info PCN Sample
ADUM3471WCRSZ-RL7 Status: Production SSOP 5.3 MM 20 Auto Reel, 500 - - Y  Material Info PCN Contact ADI
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

EVAL-ADUM3471: Evaluation Board for the ADUM3470/3471/3472/3473/3474
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADUM3471EBZ Status: Production Evaluation Board $60.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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