ADN4621

RECOMMENDED FOR NEW DESIGNS

7.5 kV RMS/3.75 kV RMS, Dual-Channel LVDS 2.5 Gigabit Isolator (1 Reverse Channel)

Data Sheet (Rev. B) Product Selection Table
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Overview

  • 7.5 kV rms/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
  • Up to ±8 kV IEC 61000-4-2 ESD protection across isolation barrier
  • High common-mode transient immunity: 70 kV/μs typical
  • Safety and regulatory approvals
    • UL 1577
      • VISO = 3750 VRMS (20-lead SSOP)
      • VISO = 17500 VRMS (16-lead SOIC_IC)
    • IEC/EN/CSA 62368-1
    • IEC/CSA 60601-1
    • IEC/CSA 61010-1
    • CQC GB4943.1
    • DIN EN IEC 60747-17 (VDE 0884-17) (pending)
      • VIORM = 1500 VPEAK
  • Enable or disable refresh (20-lead SSOP package)
  • Operating temperature range: −40°C to +125°C
  • Compact SSOP package with 5.3 mm creepage or wide SOIC_IC package with 16 mm creepage

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) or a wide SOIC_IC package with 16 mm creepage (for high working insulation voltages up to 1500 VPEAK, reinforced).

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.
ADN4621
7.5 kV RMS/3.75 kV RMS, Dual-Channel LVDS 2.5 Gigabit Isolator (1 Reverse Channel)
ADN4621 Functional Block Diagram ADN4621 Pin Configuration ADN4621 Pin Configuration ADN4621 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

Safety and Regulatory Compliance 1

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Evaluation Kits

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EVAL-ADN4621

Evaluating the ADN4621 3.75 kV RMS, Dual-Channel LVDS 2.5 Gigabit Isolator

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Features and Benefits

  • Isolated ground planes (logic side and bus side)
  • High speed layout supports 2.5 Gigabit operation and precision jitter measurements (<1 ps rms for random jitter)
  • Convenient connections through SMA terminals
    • 1.8 V power on Side 1 (VDD1) and Side 2 (VDD2)
    • 3.3 V power for LVDS receivers on Side 1 (VIO1) and Side 2 (VIO2, used with ADN4621 only)
    • Ground on Side 1 (GND1) and ground on Side 2 (GND2)
    • Side 1 LVDS signals: DIN1+, DIN1−, DIN2+ or DOUT2+, DIN2− or DOUT2−
    • Side 2 LVDS signals: DOUT1+, DOUT1−, DOUT2+ or DIN2+, DOUT2− or DIN2−
  • Jumper-selectable refresh mode
  • Termination resistors on all LVDS receivers

Product Details

The EVAL-ADN4620EBZ and EVAL-ADN4621EBZ allow quick and easy evaluation of the ADN4620/ADN4621 low voltage differential signaling (LVDS) isolators without the need for external components. The ADN4620/ADN4621 employ the Analog Devices, Inc., iCoupler® technology to combine a 2-channel isolator with LVDS receivers and drivers into a single, 20-lead SSOP package. The ADN4620/ADN4621 are capable of running at data rates of up to 2.5 Gbps with low jitter.

The EVAL-ADN4620EBZ/EVAL-ADN4621EBZ have separate ground and power planes for each side of the isolator, with individual 1.8 V power supplies required on each side of  the ADN4620/ADN4621. This separation enables the evaluation of the ADN4620/ADN4621 with galvanic isolation between both sides of the devices. An additional power supply providing 3.3 V is required on Side 1 (and also Side 2 for the ADN4621).

For full details on the ADN4620/ADN4621, see the ADN4620/ADN4621 data sheet, which must be consulted in conjunction with the user guide when using the EVAL-ADN4620EBZ or EVALADN4621EBZ.
EVAL-ADN4621
Evaluating the ADN4621 3.75 kV RMS, Dual-Channel LVDS 2.5 Gigabit Isolator
EVAL-ADN4621EBZ Evaluation Board EVAL-ADN4621EBZ Evaluation Board - Top View EVAL-ADN4621EBZ Evaluation Board - Bottom View

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