1. Products
  2. Interface and Isolation
  3. Digital Isolation Technology
  4. USB Isolators
  5. ADUM4165


Features and Benefits

  • USB 2.0 signaling with automatic detection of low, full, and high speed connections
    • 1.5 Mbps, 12 Mbps, and 480 Mbps data rates
  • Bidirectional USB isolator for upstream or downstream ports
    • Redriving and high speed data retiming for input jitter removal and an open eye
    • Flexible clock input options
  • 4.5 V to 5.5 V VBUSx or 3 V to 3.6 V operation on each side
    • 21 mA typical idle, low or full speed mode supply current
    • 48 mA typical idle, high speed mode supply current
  • Ultra low power standby in USB 2.0 suspend (L2) or disconnect
    • 1.7 mA typical low power standby, upstream supply current
    • 20 μA typical low power standby, downstream supply current
  • ±8000 V IEC 61000-4-2 ESD protection across the isolation barrier
  • Passed CISPR32/EN55032 Class B emissions
  • High common-mode transient immunity: 50 kV/μs typical
  • Safety and regulatory approvals (pending)
    • UL (pending): 5700 V rms for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A (pending)
      • IEC 62368-1, IEC 61010-1 and IEC60601‑1
    • VDE certificate of conformity (pending)
      • DIN V VDE V 0884-11 (VDE V 0884-11):2017-01
      • VIORM = 849 VPEAK
  • Operating temperature range: −55°C to +125°C
  • 20-lead, wide-body, increased creepage SOIC_IC package with 8.3 mm creepage and clearance

Product Details

The ADuM4165/ADuM41661 are USB 2.0 port isolators, utilizing Analog Devices, Inc., iCoupler® technology to dynamically support all USB 2.0 data rates; low (1.5 Mbps), full (12 Mbps), or high (480 Mbps), as required. The devices support host isolation with automatic speed negotiation as well as peripheral isolation.

High speed data is retimed for jitter reduction, requiring an external clock signal or crystal input. The ADuM4165 supports the clock or crystal input on the upstream side, and the ADuM4166 supports the clock or crystal input on the downstream side, offering two options to best suit the system design.

The low power standby mode for downstream (Side 2) supports applications with limited available power, such as battery-operated peripherals. The upstream (Side 1) standby current meets USB 2.0 requirements for suspended operation.

The isolators are specified over an extended industrial temperature range of −55°C to +125°C and are available in a 20-lead, wide-body, increased creepage SOIC_IC with 8.3 mm creepage and clearance.


  • USB peripheral, USB host, and USB hub isolation
  • Electronic test and measurement equipment
  • Medical devices and integrated PCs
  • Industrial PCs and isolated USB ports for debug or upgrade
  • USB isolator modules and USB cable isolators

1 Protected by U.S. Patents 7,075,329; 8,432,182; 8,525,547; and 8,564,327. Other patents are pending.

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations

IBIS Model

Product Recommendations

ADUM4165 Companion Parts

Recommended isoPower

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
ADUM4165BRIZ Material Declaration Reliability Data 20-Lead SOIC (Increased Creepage)
ADUM4165BRIZ-RL Material Declaration Reliability Data 20-Lead SOIC (Increased Creepage)
Wafer Fabrication Data

Sample & Buy

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Buy Now Pricing

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List Pricing

(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.