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)