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)