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GENERAL DESCRIPTION

The ADN4620/ADN46211 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.

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).

FEATURES

? 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

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)