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GENERAL DESCRIPTION

The ADN4654/ADN4655/ADN46561 are signal isolated, low voltage differential signaling (LVDS) buffers that operate at up to 1.1 Gbps with low jitter. The devices integrate Analog Devices, Inc., iCoupler? technology, enhanced for high speed operation to provide galvanic isolation of the TIA/EIA-644-A compliant LVDS drivers and receivers. This integration allows drop-in isolation of an LVDS signal chain. The ADN4654/ADN4655/ADN4656 comprise multiple

channel configurations, and the LVDS receivers on the ADN4655 and ADN4656 include a fail-safe mechanism to ensure a Logic

1 on the corresponding LVDS driver output when the inputs are floating, shorted, or terminated but not driven.

For high speed operation with low jitter, the LVDS and isolator circuits rely on a 2.5 V supply. An integrated on-chip low dropout

(LDO) regulator can provide the required 2.5 V from an external 3.3 V power supply. The devices are fully specified over a wide

industrial temperature range and come in a 20-lead, wide body SOIC_W package with 5 kV rms isolation or in a 20-lead SSOP

package with 3.75 kV rms isolation.

FEATURES 5 kV rms and 3.75 kV rms LVDS isolators

Complies with TIA/EIA-644-A LVDS standard Multiple dual-channel configurations

Any data rate up to 1.1 Gbps switching with low jitter

4 ns typical propagation delay 2.6 ps rms typical random jitter, rms 90 ps typical peak-to-peak total jitter at 1.1 Gbps

2.5 V or 3.3 V supplies ?75 dBc power supply ripple rejection, phase spur level Glitch immunity ±8 kV IEC 61000-4-2 ESD protection across isolation barrier

High common-mode transient immunity: >25 kV/μs Passes EN 55022 Class B radiated emissions limits with

1.1 Gbps PRBS

Safety and regulatory approvals (20-lead SOIC_W package)

UL (pending): 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A (pending) VDE certificate of conformity (pending)

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

VIORM = 424 VPEAK

Fail-safe output high for open, short, and terminated input conditions (ADN4655/ADN4656) Operating temperature range: ?40°C to +125°C 7.8 mm minimum creepage and clearance

APPLICATIONS

Isolated video and imaging data

Analog front-end isolation

Data plane isolation

Isolated high speed clock and data links