Overview

Features and Benefits

  • 3.75 kV rms LVDS isolators
  • Complies with TIA/EIA-644-A LVDS signal levels
  • Dual-channel configuration (ADN4620: 2 + 0, ADN4621: 1 + 1)
  • Any data rate up to 2.5 Gbps switching with low jitter
    • 5 Gbps total bandwidth across two channels
    • 2.15 ns typical propagation delay
    • Typical jitter: 0.82 ps rms random, 40 ps total peak-to-peak
  • Lower power 1.8 V supplies with 3.3 V supplies for I/O
  • ±7 kV IEC 61000-4-2 ESD protection across isolation barrier
  • High common-mode transient immunity: 70 kV/μs typical
  • Safety and regulatory approvals (20-lead SSOP package)
    • UL (pending): 3750 V rms for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A (pending)
    • VDE certificate of conformity, reinforced insulation (pending)
      • DIN V VDE V 0884-11 (VDE V 0884-11):2017-01
      • VIORM = 1500 VPEAK (maximum working insulation voltage)
  • Enable or disable refresh (low speed output correctness check)
  • Operating temperature range: −40°C to +125°C
  • Compact SSOP package with 5.3 mm creepage

Product Details

The ADN4620/ADN4621 are dual-channel, signal isolated, low voltage differential signaling (LVDS) buffers that operate at up to 2.5 Gbps with very low jitter. The devices integrate Analog Devices, Inc., iCoupler® technology, enhanced for high speed operation to provide drop-in galvanic isolation of LVDS signal chains. AC coupling and/or level shifting to the LVDS receivers and from the LVDS drivers allows isolation of other high speed signals, such as current mode logic (CML).

The ADN4620/ADN4621 include a refresh mechanism to monitor the input and output states and ensure that they remain the same in the absence of data transitions (for example, at power-on). For lower power consumption and high speed operation with low jitter, the isolator circuits rely on 1.8 V supplies, while 3.3 V supplies are used for LVDS receivers to support the full common-mode range with an input voltage range (input common mode plus differential input voltage) of 0 V to 2.4 V per Table 2 in the data sheet.

The devices are fully specified over a wide industrial temperature range and are available in a compact SSOP package with 5.3 mm creepage (for reinforced insulation at ac mains voltages).

APPLICATIONS

  • Analog front-end isolation
  • Data plane isolation
  • Isolated high speed clock and data links
  • Multigigabit serialization/deserialization (SERDES)
  • PCB-to-PCB optical replacement (for example, short reach fiber)

Protected by U.S. Patents 7,075,329; 9,941,565; and 10,205,442. Other patents are pending.

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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.

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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.